IHARA VTF Series Metal Gasket Seal Fitting

Product Made In Japan
Manufacturer: IHARA SCIENCE CORPORATION
Model: VTF Series

◆Features

１．Wide range applications from ultra high vacuum to high pressure, lower and higher temperature through metal gasket seal.
２．Spacing when install and uninstall can be minimized.
３．As the nut thread is silver plated and lubricated, tightening torque is reduced and also free from galling.
４．Thrust washer (VSTW) and thrust bearing (VTJR) are available for the protection from co-rotation of the tube when tightening female nut.
５．Material of the parts to be welded is SUS316 and is machined highly accurate.
６．For customers demanding high purity and ultra-high performance fittings, we offer products that come standard with W melt (VIM+VAR) materials, double melt material with almost no non-metallic inclusion and vey low impurities such as Mn.
７．After the precision cleaning, protect seal surface of the fitting and vacuum packed one by one inside clean room.
８．Identification label showing product type, part symbol, inner roughness etc. is put on each product package.

◆Specification of Fitting

Part No	Material
Gland Tube butt weld Connector Tube butt weld Elbow Tube butt weld Tee	SUS316L Single melt material Double melt material
Tube butt weld Connector Connector, Union Coupling, Adapter Elbow, Tee, Cross Nut, Plug	SUS316
Gasket / Holder	Ni, SUS316LW double melted / SUS316
Thrust Washer	Metal mesh + Fluorine resin
Thrust Bearing	SUS304 • SUS440C

Working Pressure

Condition	Pressure
Vacuum	VAC ~ 0 Pa
Positive	0 ~ 20.6 Mpa

As the temperature rises, allowable service pressure may decrease.

Working Temperature Range

Component	Temperature Range
Gland, etc.	-269 ~ 450℃
Connector, etc.	-253 ~ 450℃
Gasket Ni	-196 ~ 315℃
Gasket SUS316L	-269 ~ 450℃
Thrust Washer	-196 ~ 180℃
Thrust Bearing	-196 ~ 350℃

◆Nomenclature

◆Types

To ensure that our customers are satisfied with the applications and cost performance of our products, we also offer the three types beyond our standard combination.
①Thrust bearing inserted type
Smooth tightening keeps tightening torque low for the female nut. Useful for preventing co-rotation with the gland, and minimal twisting during piping work.

②Compact (High flow) type
Very compact, but realized high flow.

Reference: Data of gland co-rotation (in-house test data)

Size	Standard	Thrust washer/bearing inserted
	Tightened 1/8 turn	Tightened 1/6 turn
1/4″	2° ~ 2°30′	0°18′ ~ 0°30′
1/2″	2°30′ ~ 3°	0°30′ ~ 1°

Any type of customized products are available, for instance, with less fittings and less welding.
Feel free to inquire your customized requirement.

Long Gland for Male Nut

VTF− GD

Part No	Size of VTF	Tube size (φA)	Tube Thickness (t)	φD	φB	L	ℓ
VTGD 2-2~※	1/8	3.18	0.72	1.74	5.1	17.8	7.1
VTGD 4-2~※	1/4	3.18	0.72	1.74	8.8	33.3	10.4
VTF-GD4-43A~※	1/4	6.35	1.0	4.35	8.8	43.2	19.05
VTF-GD4-43B~※	1/4	6.35	1.0	4.35	8.8	43.2	19.05
VTF-GD4-43C~※	1/4	6.35	1.0	4.35	8.8	43.2	19.1
VTGD 4-4~※	1/4	6.35	1.0	4.35	8.8	44.2	20.5
VTF-GDB-4-46C~※	1/2 (3/8)	6.35	1.0	4.35	15.1	45.7	19.1
VTGD 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	47.2	20.5
VTF-GDB-6-45A~※	1/2 (3/8)	9.53	1.0	7.5	15.1	45.5	19.05
VTF-GDB-6-45B~※	1/2 (3/8)	9.53	1.0	7.5	15.1	45.5	19.05
VTF-GDB-6-45C~※	1/2 (3/8)	9.53	1.0	7.5	15.1	45.5	19.1
VTGD 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	47.2	20.5
VTF-GDB-45A~※	1/2 (3/8)	12.7	1.24	10.2	15.1	45.5	19.05
VTF-GDB-45B~※	1/2 (3/8)	12.7	1.24	10.2	15.1	45.5	19.05
VTF-GDB-45C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	45.5	19.1
VTGD 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	47.2	20.5
VTGD 8-8T~※	1/2 (3/8)	12.7	1.0	10.7	15.1	47.2	20.5
VTGD 12-4~※	3/4	6.35	1.0	7.5	22.2	52.0	20.5
VTGD 12-6~※	3/4	9.53	1.0	7.5	22.2	52.0	20.5
VTGD 12-8~※	3/4	12.7	1.24	10.2	22.2	52.0	20.5
VTGD 12-12~※	3/4	19.05	1.65	15.75	22.2	52.0	20.5
VTGD-GD12-52B~※	3/4	19.05	1.24	16.57	22.2	51.6	19.05
VTGD 16-16~※	1	25.4	1.65	22.1	30.2	58.9	19.05

VTGM、VTGL

Part No	Size of VTF	Tube size (φA)	Tube Thickness (t)	φD	φB	L	ℓ
VTGM 4-4~※	1/4	6.35	1.0	4.35	8.8	30.5	6.35
VTGL 4-4~※	1/4	6.35	1.0	4.35	8.8	31.8	7.0
VTF-GM4-30C~※	1/4	6.35	1.0	4.35	8.8	30.5	6.4
VTF-GM4-33A~※	1/4	6.35	1.0	4.35	8.8	33.5	6.35
VTF-GM4-33C~※	1/4	6.35	1.0	4.35	8.8	33.5	9.7
VTF-GM8-4-37A~※	1/2 (3/8)	6.35	1.0	4.35	15.1	37.5	6.35
VTGM 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	32.8	6.35
VTGL 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	34.7	7.0
VTF-GM8-6-33C~※	1/2 (3/8)	9.53	1.0	7.5	15.1	32.8	6.4
VTF-GM8-6-37A~※	1/2 (3/8)	9.53	1.0	7.5	15.1	37.5	6.35
VTGM 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	32.8	6.35
VTGL 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	34.7	7.5
VTF-GM8-33C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	32.8	6.4
VTF-GM8-30C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	35.8	6.7
VTF-GM8-37A~※	1/2 (3/8)	12.7	1.24	10.2	15.1	37.5	6.35

VTGE、VTF−GE

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φD	φB	L	ℓ
VTGE 2-2~※	1/8	3.18	0.72	1.74	5.1	12.2	7.1
VTF-GE2-27B~※	1/8	3.18	0.72	1.74	5.1	27.4	19.05
VTF-GE2-27C~※	1/8	3.18	0.72	1.74	5.1	27.4	19.1
VTGE 4-2~※	1/4	3.18	0.72	1.74	8.8	28.5	7.1
VTF-GE4-28A~※	1/4	6.35	1.0	4.35	8.8	28.5	7.1
VTF-GE4-28B~※	1/4	6.35	1.0	4.35	8.8	27.9	19.05
VTF-GE4-28C~※	1/4	6.35	1.0	4.35	8.8	27.9	19.1
VTGE 4-4~※	1/4	6.35	1.0	4.35	8.8	29.0	20.5
VTF-GE4-31A~※	1/4	6.35	1.0	4.35	8.8	31.0	19.05
VTGE 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	28.4	19.05
VTF-GE8-4-28B~※	1/2 (3/8)	6.35	1.0	4.35	15.1	28.4	19.05
VTF-GE8-4-28C~※	1/2 (3/8)	6.35	1.0	4.35	15.1	28.4	19.1
VTGE 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	30.0	20.5
VTF-GE8-6-28B~※	1/2 (3/8)	9.53	1.0	7.5	15.1	28.5	19.05
VTF-GE8-6-28C~※	1/2 (3/8)	9.53	1.0	7.5	15.1	28.5	19.1
VTGE 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	28.4	19.05
VTGE 8-8T~※	1/2 (3/8)	12.7	1.0	10.7	15.1	28.5	19.1
VTGE 12-4~※	3/4	6.35	1.0	4.35	22.2	36.5	22.0
VTGE 12-6~※	3/4	9.53	1.0	7.5	22.2	36.5	22.0
VTGE 12-12~※	3/4	19.05	1.65	15.75	22.2	35.0	20.5
VTGE 12-12T~※	3/4	19.05	1.24	16.57	22.2	35.0	20.5
VTGE-GE12-30B~※	3/4	19.05	1.24	16.57	22.2	30.0	19.05
VTGE 16-16~※	1	25.4	1.65	22.1	30.2	40.0	19.05

VTGN、VTGT、VTF−GN

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φD	φB	L	ℓ
VTF-GN2-12B~※	1/8	3.18	0.72	1.74	?	12.2	7.0
VTGT 4-2~※	1/4	3.18	0.72	1.74	8.8	18.0	7.0
VTGN 4-4~※	1/4	6.35	1.0	4.35	8.8	15.2	6.35
VTGT 4-4~※	1/4	6.35	1.0	4.35	8.8	18.0	7.0
VTF-GN4-15C~※	1/4	6.35	1.0	4.35	8.8	15.2	6.4
VTF-GN4-18A~※	1/4	6.35	1.0	4.35	8.8	18.2	6.35
VTF-GN4-18C~※	1/4	6.35	1.0	4.35	8.8	18.3	9.7
VTGN 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	15.2	6.35
VTGT 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	20.1	7.0
VTGN 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	15.2	6.35
VTF-GN8-6-16C~※	1/2 (3/8)	9.53	1.0	7.5	15.1	15.7	6.4
VTGT 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	20.1	7.0
VTF-GN8-6-19A~※	1/2 (3/8)	9.53	1.0	7.5	15.1	19.3	6.35
VTGN 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	15.2	6.35
VTF-GN8-16C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	15.7	6.4
VTF-GN8-19C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	18.8	9.7
VTGT 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	20.1	7.5

VTGC、SVTGC（Short type）

Part No	Size of VTF	Tube size (φA)	φD	φB	L	ℓ
VTGC 2-1~※	1/8	1.59	1.3	5.1	17.8	2.5
VTGC 2-2~※	1/8	3.18	1.74	5.1	17.8	2.5
VTGC 4-2~※	1/4	3.18	2.3	8.8	33.3	2.5
VTGC 4-4~※	1/4	6.35	4.35	8.8	33.3	7.1
VTGC 8-4~※	1/2 (3/8)	6.35	4.35	15.1	38.1	7.1
VTGC 8-6~※	1/2 (3/8)	9.53	7.5	15.1	38.1	7.9
VTGC 8-8~※	1/2 (3/8)	12.7	10.2	15.1	38.1	9.7
VTGC 12-12~※	3/4	19.05	15.7	22.2	50.8	11.2
VTGC 16-16~※	1	25.4	22.1	30.2	56.4	15.7
SVTGC 4-4~※	1/4	6.35	4.35	8.8	19.1	7.1
SVTGC 4-12C~※	1/4	6.35	4.35	8.8	12.7	7.1
SVTGC 8-4~※	1/2 (3/8)	6.35	4.35	15.1	24.1	7.1
SVTGC 8-6~※	1/2 (3/8)	9.53	7.5	15.1	24.1	7.9
SVTGC 8-8~※	1/2 (3/8)	12.7	10.2	15.1	24.1	9.7

VTF−＊−BL

Part No	Size of VTF	φB	L
VTF-GC2-BL~※	1/8	5.1	17.8
VTF-GC4-BL~※	1/4	8.8	33.3
VTF-GC8-BL~※	1/2 (3/8)	15.1	38.1
VTF-GC12-BL~※	3/4	22.2	50.8
VTF-GC16-BL~※	1	30.2	56.4

VTGB、VTF−GB

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φD	φB	L	ℓ
VTGB 2-2~※	1/8	3.18	0.72	1.74	5.1	17.8	7.1
VTGB 4-2~※	1/4	3.18	0.72	1.74	8.8	33.3	10.4
VTF-GB4-2-33C~※	1/4	3.18	0.72	1.74	8.8	33.3	7.1
VTGB 4-4~※	1/4	6.35	1.0	4.35	8.8	33.3	10.4
VTF-GB4-33C~※	1/4	6.35	1.67	3.0	8.8	33.3	10.4
VTGB 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	38.1	10.4
VTF-GB8-4-38C~※	1/2 (3/8)	6.35	1.67	3.0	15.1	38.1	10.4
VTGB 8-6~※	1/2 (3/8)	9.53	1.0	7.5	15.1	38.1	10.4
VTF-GB8-6-38C~※	1/2 (3/8)	9.53	1.21	7.1	15.1	38.1	10.4
VTF-GB8-38C~※	1/2 (3/8)	12.7	1.24	10.2	15.1	38.1	12.7
VTGB 8-8~※	1/2 (3/8)	12.7	1.24	10.2	15.1	38.1	12.7
VTGB 12-8~※	3/4	12.7	1.24	10.2	22.2	50.8	15.7
VTGB 12-12~※	3/4	19.05	1.65	15.75	22.2	50.8	15.7
VTGB 16-16~※	1	25.4	1.65	22.1	30.2	56.4	20.6

VTGAD

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φD	φB	L	ℓ
VTGAD 2-2~※	1/8	3.18	0.72	1.74	5.1	36.0	15.5
VTGAD 4-4~※	1/4	6.35	1.0	4.35	8.8	41.0	16.2
VTGAD 8-4~※	1/2 (3/8)	6.35	1.0	4.35	15.1	46.0	16.2
VTGAD 8-6~※	1/2 (3/8)	9.53	1.36	6.8	15.1	46.0	17.8
VTGAD 8-8~※	1/2 (3/8)	12.7	1.65	9.4	15.1	49.3	24.4
VTGAD 12-8~※	3/4	12.7	1.65	9.4	22.2	57.2	24.4
VTGAD 12-12~※	3/4	19.05	1.65	15.75	22.2	58.0	25.2

VTCT（NPT thread）

Part No	Size of VTF	T₁ NPT thread	φD	φD₁	H Hex. size	L
VTCT 2-1~※	1/8	1/16	2.3	2.3	9.53	26.2
VTCT 2-2~※	1/8	1/8	2.3	4.4	11.11	26.2
VTCT 4-2~※	1/4	1/8	4.35	4.35	15.88	32.5
VTCT 4-4~※	1/4	1/4	4.35	6.0	15.88	37.8
VTCT 4-6~※	1/4	3/8	4.35	7.5	19.05	38.0
VTCT 8-4~※	1/2 (3/8)	1/4	10.2	6.0	23.81	41.0
VTCT 8-6~※	1/2 (3/8)	3/8	10.2	9.7	23.81	41.1
VTCT 8-8~※	1/2 (3/8)	1/2	10.2	10.2	23.81	46.0
VTCT 8-12~※	1/2 (3/8)	3/4	10.2	15.75	33.34	47.8
VTCT 8-16~※	1/2 (3/8)	1	10.2	22.1	34.93	55.8
VTCT 12-4~※	3/4	1/4	15.75	6.0	33.34	48.7
VTCT 12-6~※	3/4	3/8	15.75	9.7	33.34	48.8
VTCT 12-8~※	3/4	1/2	15.75	10.2	33.34	53.8
VTCT 12-12~※	3/4	3/4	15.75	15.75	33.34	53.8
VTCT 16-16~※	1	1	22.1	22.1	41.28	62.6

Male Connector (R thread) VTCT（R thread）

Part No	Size of VTF	T₁ R thread	φD	φD₁	H Hex. size	L
VTCT 2-R1~※	1/8	1/16	2.3	2.3	9.53	26.2
VTCT 2-R2~※	1/8	1/8	2.3	4.4	11.11	26.2
VTCT 4-R2~※	1/4	1/8	4.35	4.35	15.88	32.5
VTCT 4-R4~※	1/4	1/4	4.35	6.0	15.88	37.8
VTCT 4-R6~※	1/4	3/8	4.35	7.5	19.05	40.0
VTCT 4-R8~※	1/4	1/2	4.35	10.2	23.81	43.7
VTCT 8-R4~※	1/2 (3/8)	1/4	10.2	6.0	23.81	41.0
VTCT 8-R6~※	1/2 (3/8)	3/8	10.2	9.7	23.81	42.1
VTCT 8-R8~※	1/2 (3/8)	1/2	10.2	10.2	23.81	46.0
VTCT 8-R12~※	1/2 (3/8)	3/4	10.2	15.75	33.34	47.8
VTCT 8-R16~※	1/2 (3/8)	1	10.2	22.1	34.93	55.8
VTCT 12-R4	3/4	1/4	15.75	6.0	33.34	48.7
VTCT 12-R6	3/4	3/8	15.75	9.7	33.34	48.8
VTCT 12-R8	3/4	1/2	15.75	10.2	33.34	53.8
VTCT 12-R12	3/4	3/4	15.75	15.75	33.34	53.8
VTCT 16-R16	1	1	22.1	22.1	41.28	62.6

Male Connector (Straight thread) VTCU

Part No	Size of VTF	T₁ unified thread	φD	φD₁	ℓ	H Hex. size	L	O-ring AS568
VTCU 4-4~※	1/4	7/16-20	4.35	5.2	9.1	19	33.0	-904
VTCU 4-6~※	1/4	9/16-18	4.35	7.1	9.9	19	33.8	-906
VTCU 8-6~※	1/2 (3/8)	9/16-18	7.5	7.5	9.9	23.81	37.6	-906
VTCU 8-8~※	1/2 (3/8)	3/4-16	10.2	10.2	11.1	23.81	38.8	-908
VTCU 8-10~※	1/2 (3/8)	7/8-14	7.5	15.0	12.7	25.4	42.2	-910
VTCU 12-6~※	3/4	9/16-18	15.75	7.1	9.9	33.34	45.1	-906
VTCU 12-12~※	3/4	1 1/16-12	15.75	15.75	15.09	33.34	52.3	-912

*O-ring is a standard accessory. (Material is FKM)

VTSA（NPT thread）

Part No	Size of VTF	T₁ NPT thread	φD	H Hex. size	L
VTSA 2-1~※	1/8	1/16	2.3	11.11	29.5
VTSA 2-2~※	1/8	1/8	2.3	14.29	30.2
VTSA 4-2~※	1/4	1/8	4.35	15.88	35.8
VTSA 4-4~※	1/4	1/4	4.35	19	36.6
VTSA 8-4~※	1/2 (3/8)	1/4	10.2	23.81	38.0
VTSA 8-6~※	1/2 (3/8)	3/8	10.2	23.81	41.1
VTSA 8-8~※	1/2 (3/8)	1/2	10.2	26.99	48.5
VTSA 8-16~※	1/2 (3/8)	1	10.2	41.28	55.0
VTSA 12-12~※	3/4	3/4	15.75	33.34	55.6
VTSA 16-16~※	1	1	22.1	41.28	63.8

Female Connector (Rc thread)

VTSA（Rc thread）

Part No	Size of VTF	T₁ NPT thread	φD	H Hex. size	L
VTSA 2-R1~※	1/8	1/16	2.3	11.11	29.5
VTSA 2-R2~※	1/8	1/8	2.3	14.29	30.2
VTSA 4-R2~※	1/4	1/8	4.35	15.88	35.8
VTSA 4-R4~※	1/4	1/4	4.35	19	36.6
VTSA 8-R4~※	1/2 (3/8)	1/4	10.2	23.81	38.0
VTSA 8-R6~※	1/2 (3/8)	3/8	10.2	23.81	41.1
VTSA 8-R8~※	1/2 (3/8)	1/2	10.2	26.99	48.5
VTSA 12-R8~※	3/4	1/2	15.75	33.34	54.6
VTSA 12-R12~※	3/4	3/4	15.75	33.34	55.6
VTSA 16-R12~※	1	3/4	22.1	41.28	63.8
VTSA 16-R16~※	1	1	22.1	41.28	63.8

BI-LOK Fitting Connector VTUB

Part No	Size of VTF	Tube size (φA)	φD	H Hex. size	H₁ Hex. size	ℓ₁	L
VTUB 2-2~※	1/8	3.18	2.3	15.88	11.11	13	37.9
VTUB 4-2~※	1/4	3.18	4.35	15.88	11.11	13	38.6
VTUB 4-4~※	1/4	6.35	4.35	15.88	14.29	15.4	40.7
VTUB 4-8~※	1/4	12.7	4.35	23.81	22.23	23	46.3
VTUB 8-4~※	1/2 (3/8)	6.35	7.5	23.81	14.29	15.4	45.5
VTUB 8-6~※	1/2 (3/8)	9.53	7.5	23.81	17.46	17	46.3
VTUB 8-8~※	1/2 (3/8)	12.7	10.2	23.81	22.23	23	49.6
VTUB 8-12~※	1/2 (3/8)	19.05	10.2	26.99	28.58	24.6	55.3
VTUB 12-8~※	3/4	12.7	15.75	33.34	22.23	23	57.4
VTUB 12-12~※	3/4	19.05	15.75	33.34	28.58	24.6	57.4
VTUB 12-16~※	3/4	25.4	15.75	38.1	38.1	31	66.6
VTUB 4-4~※	1	6.35	22.1	41.27	14.29	15.4	56.5
VTUB 4-6M~※	1/4	6.0	4.35	15.88	14	15.4	40.7

BI-LOK Bulkhead Fitting Connector VTSB

Part No	Size of VTF	Tube size (φA)	T₁ unified thread	φD	H Hex. size	H₁ Hex. size	ℓ₂	H₂ Hex. size	L
VTSB 4-4~※	1/4	6.35	7/16 – 20	4.35	15.88	14.29	15.4	15.88	57.5
VTSB 4-4S~※	1/4	6.35	7/16 – 20	4.35	15.88	14.29	15.4	15.88	48.1
VTSB 4-6~※	1/4	9.53	9/16 – 20	4.35	19.00	17.46	17.0	19.00	58.3
VTSB 8-6~※	1/2 (3/8)	9.53	9/16 – 20	7.5	23.81	17.46	23.0	23.81	64.9
VTSB 8-8~※	1/2 (3/8)	12.7	3/4 – 20	10.2	23.81	22.23	23.0	23.81	70.0
VTSB 8-12~※	1/2 (3/8)	19.05	1 – 20	10.2	30.16	28.58	24.6	30.16	87.1
VTSB 12-12~※	3/4	19.05	1 – 20	15.75	33.34	28.58	24.6	33.34	93.3
VTSB 16-16~※	1	1 5/16 – 20	22.1	41.28	31.8	41.28	36.1	41.28	96.3

BI-LOK Fitting Bore Through Connector

Part No	Size of VTF	Tube size (φA)	φD	H Hex. size	H₁ Hex. size	L
VTUB 4-1-BT~※	1/4	1.58	4.35	15.88	7.93	34.12
VTUB 4-2-BT~※	1/4	3.17	4.35	15.88	11.11	38.45
VTUB 8-8M-BT~※	1/2 (3/8)	8	10.2	23.81	17.0	46.0

Union VTUA、VTF−UA

Part No	Size of VTF	φD	H Hex. size	L
VTUA 2~※	1/8	2.3	9.53	27.7
VTUA 4~※	1/4	4.35	15.88	38.9
VTUA 8~※	1/2 (3/8)	10.2	23.81	46.0
VTUA 12~※	3/4	15.75	33.34	60.5
VTUA 16~※	1	22.1	41.27	64.6
VTF-UA2~※	1/8	2.3	9.53	28.7
VTF-UA4~※	1/4	4.35	15.88	39.4
VTF-UA8~※	1/2 (3/8)	10.2	23.81	46.7

Reduced Union VTUR

Part No	Size of VTF	Size of VTF	φD	φD₁	H Hex. size	L
VTUR 4-2~※	1/4	1/8	4.35	2.3	15.88	35.1
VTUR 8-4~※	1/2 (3/8)	1/4	7.5	4.35	23.81	43.4
VTUR 12-4~※	3/4	1/4	15.75	4.35	33.34	51.0
VTUR 12-8~※	3/4	1/2	15.75	10.2	33.34	55.0
VTUR 16-4~※	1	1/4	22.1	4.35	41.28	55.0
VTUR 16-8~※	1	1/2	22.1	10.2	41.28	58.0
VTUR 16-12~※	1	3/4	22.1	15.75	41.28	65.0

Bulkhead Union VTSU、VTF−SU

Part No	Size of VTF	T unified thread	φD	ℓ	S Max	H Hex. size	L	Diameter of wall through hole
VTSU 2~※	1/8	5/16 – 24	2.3	23.5	6	11.11	41.0	9.0
VTSU 4~※	1/4	9/16 – 18	4.35	31.8	11.2	19	54.9	15.0
VTSU 8~※	1/2 (3/8)	7/8 – 14	10.2	36.6	12.7	26.99	63.5	23.0
VTSU 12~※	3/4	1 1/4 – 18	15.75	46.6	17.46	38.1	82.0	32.5
VTSU 16~※	1	1 1/2 – 20	22.1	50.0	17.46	47.63	88.5	39.0
VTF-SU4~※	1/4	9/16 – 18	4.35	33.0	11.2	19	56.6	15.0
VTF-SU4S~※	1/4	9/16 – 18	4.35	25.1	3.3	19	46.2	15.0
VTF-SU8~※	1/2 (3/8)	7/8 – 14	10.2	37.6	12.7	26.99	65.3	23.0
VTF-SU8S~※	1/2 (3/8)	7/8 – 14	10.2	28.2	3.3	26.99	54.4	23.0

Bulkhead Connector for Tube Butt Weld VTST

Part No	Size of VTF	T unified thread	φD	ℓ	S Max	H Hex. size	L	Diameter of wall through hole
VTSU 2~※	1/8	5/16 – 24	2.3	23.5	6	11.11	41.0	9.0
VTSU 4~※	1/4	9/16 – 18	4.35	31.8	11.2	19	54.9	15.0
VTSU 8~※	1/2 (3/8)	7/8 – 14	10.2	36.6	12.7	26.99	63.5	23.0
VTSU 12~※	3/4	1 1/4 – 18	15.75	46.6	17.46	38.1	82.0	32.5
VTSU 16~※	1	1 1/2 – 20	22.1	50.0	17.46	47.63	88.5	39.0
VTF-SU4~※	1/4	9/16 – 18	4.35	33.0	11.2	19	56.6	15.0
VTF-SU4S~※	1/4	9/16 – 18	4.35	25.1	3.3	19	46.2	15.0
VTF-SU8~※	1/2 (3/8)	7/8 – 14	10.2	37.6	12.7	26.99	65.3	23.0
VTF-SU8S~※	1/2 (3/8)	7/8 – 14	10.2	28.2	3.3	26.99	54.4	23.0

Coupling VTCG

Part No	Size of VTF	H Hex. size	L
VTCG 2~※	1/8	11.11	16.8
VTCG 4~※	1/4	19	30.2
VTCG 8~※	1/2 (3/8)	26.99	33.3
VTCG 12~※	3/4	38.1	42.7
VTCG 16~※	1	44.45	51.8

Reduced Adapter VTSS

Part No	Size of VTF	Size of VTF	φD	φD₁	H Hex. size	L
VTSS 2-4~※	1/8	1/4	2.3	–	19	30.2
VTSS 4-2~※	1/4	1/8	4.35	3.3	15.88	29.1
VTSS 4-4~※	1/4	1/4	4.35	–	19.0	35.0
VTSS 4-8~※	1/4	1/2	4.35	10.2	26.99	38.5
VTSS 4-12~※	1/4	3/4	4.35	15.75	38.1	44.8
VTSS 8-4~※	1/2 (3/8)	1/2	10.2	4.35	23.81	38.2
VTSS 8-12~※	1/2 (3/8)	3/4	10.2	15.75	38.1	48.0
VTSS 12-4~※	3/4	1/4	15.75	4.35	33.34	45.0
VTSS 12-8~※	3/4	1/2	15.75	10.2	33.34	48.0

Male Elbow (NPT thread) VTLN（NPT thread）

Part No	Size of VTF	T₁ NPT thread	φD	h Width flats	L	L₁
VTLN 4-2~※	1/4	1/8	4.35	17.5	28.7	22.4
VTLN 4-4~※	1/4	1/4	4.35	17.5	28.7	26.9
VTLN 8-4~※	1/2 (3/8)	1/4	10.2	20.6	33.3	26.9
VTLN 8-6~※	1/2 (3/8)	3/8	10.2	20.6	33.3	28.2
VTLN 8-8~※	1/2 (3/8)	1/2	10.2	20.6	33.3	33.3
VTLN 12-12~※	3/4	3/4	15.75	31.8	46.0	39.7

Male Elbow (R thread) VTLN（R thread）

Part No	Size of VTF	T₁ R thread	φD	h Width flats	L	L₁
VTLN 4-R2~※	1/4	1/8	4.35	17.5	28.7	22.4
VTLN 4-R4~※	1/4	1/4	4.35	17.5	28.7	26.9
VTLN 4-R6~※	1/4	3/8	4.35	20.6	28.7	28.2
VTLN 8-R6~※	1/2 (3/8)	3/8	10.2	20.6	33.3	28.2
VTLN 8-R8~※	1/2 (3/8)	1/2	10.2	20.6	33.3	33.3
VTLN 12-R4~※	3/4	1/4	15.75	31.8	46.0	36.7
VTLN 12-R8~※	3/4	1/2	15.75	31.8	46.0	39.7
VTLN 12-R12~※	3/4	3/4	15.75	31.8	46.0	39.7

Union Elbow VTLA、VTF−LA

(mm)

Part No	Size of VTF	φ D	h Width flats	L
VTLA 2-※	1/8	2.3	11.11	19.8
VTLA 4-※	1/4	4.35	17.5	28.7
VTLA 8-※	1/2 (3/8)	10.2	20.6	33.3
VTF-LA 2-※	1/8	2.3	11.11	22.6
VTF-LA 4-※	1/4	4.35	17.5	27.2
VTF-LA 8-※	1/2 (3/8)	10.2	25.0	36.8
VTF-LA 12-※	3/4	15.7	34.0	48.8
VTF-LA 16-※	1	22.1	42.9	50.8

Union Tee VTTA、VTF−TA

(mm)

Part No	Size of VTF	φ D	h Width flats	L
VTTA 2-※	1/8	2.3	11.1	19.8
VTTA 4-※	1/4	4.35	17.5	28.7
VTTA 8-※	1/2 (3/8)	10.2	20.6	33.3
VTF-TA 2-※	1/8	2.3	11.0	22.6
VTF-TA 4-※	1/4	4.35	17.5	27.2
VTF-TA 8-※	1/2 (3/8)	10.2	25.0	36.8
VTF-TA 12-※	3/4	15.7	34.0	48.8
VTF-TA 16-※	1	22.1	42.9	50.8

Reducing Tee VTTR

Part No	Size of VTF	Size of VTF	φ D	h Width flats	L	L₁	D2
VTTR8-4-※	1/2 (3/8)	1/4	10.2	20.6	33.3	30	4.35
VTTR12-4-※	3/4	1/4	15.75	35.0	41.8	34	4.35

Union Cross VTXA、VTF− XA

Part No	Size of VTF	φ D	h Width flats	L
VTXA 2-※	1/8	2.3	11.11	19.8
VTXA 4-※	1/4	4.35	17.5	28.7
VTXA 8-※	1/2 (3/8)	10.2	20.6	33.3
VTF-XA 2-※	1/8	2.3	11.1	22.6
VTF-XA 4-※	1/4	4.35	17.5	27.2
VTF-XA 8-※	1/2 (3/8)	10.2	25.0	36.8

Connector For Resin Tube Fitting VTEP

Part No	Size of VTF	Resin tube fitting Size	φ D	h Width flats	L	D1
VTEP4 – 6.35×4.35 – ※	1/4	φ 6 × φ 4	4.35	15.88	34.2	3.9

Elbow for Butt Weld VTLT

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φ D	h Width flats	φ D1	L	L1	ℓ
VTLT 4-4-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	25.0	16.5
VTLT 4-4S-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	14.9	6.4
VTLT 8-4-※	1/2 (3/8)	6.35	1.0	10.2	25.0	4.35	33.3	33.3	19.0
VTLT 8-6-※	1/2 (3/8)	9.53	1.0	10.2	25.0	7.5	33.3	33.3	19.0

We also manufacture other dimensions/sizes.

Tee for Butt Weld VTTT

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φ D	h Width flats	φ D1	L	L1	ℓ
VTTT 4-4-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	25.0	16.5
VTTT 6-4-※	1/4	9.53	1.0	7.5	17.0	7.5	27.2	25.0	16.5
VTTT 4-8-※	1/2 (3/8)	6.35	1.0	7.5	25.0	4.35	33.3	33.3	19.0
VTTT 6-8-※	1/2 (3/8)	9.53	1.0	7.5	25.0	7.5	33.3	33.3	19.0

We also manufacture other dimensions/sizes.

Tee for Butt Weld VTKT

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φ D	h Width flats	φ D1	L	L1	ℓ
VTKT 4-4-4-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	25.0	16.5
VTKT 4-4S-4-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	15.0	6.35

We also manufacture other dimensions/sizes.

Bulkhead Tee for Butt Weld VTNT

Part No	Size of VTF	Tube size (φA)	Thickness (t)	φ D	h Width flats	φ D1	L	L1	ℓ
VTNT 4-4-※	1/4	6.35	1.0	4.35	17.0	4.35	27.2	25.0	16.5

Additionally, it mentions: “We also manufacture other dimensions/sizes.

Welded Connector (R thread)

Part No	Size of VTF	T (R thread)	φ D	H (Hex. size)	H₁ (Hex. size)	L
WVTC T 4-R2-※	1/4	1/8	4.35	19	12	39.4
WVTC T 4-R4-※	1/4	1/4	4.35	19	14.29	45.5
WVTC T 4-R6-※	1/4	3/8	4.35	19	19	46
WVTC T 8-R4-※	1/2 (3/8)	1/4	4.35	26.99	14.29	45.5
WVTC T 8-R6-※	1/2 (3/8)	3/8	7.5	26.99	19	50.2
WVTC T 8-R8-※	1/2 (3/8)	1/2	10.2	26.99	22.23	53.2
WVTC T 12-R12-※	3/4	3/4	15.75	38.1	30	96.3

Welded Connector (NPT thread)

Part No	Size of VTF	T (NPT thread)	φ D	H (Hex. size)	H₁ (Hex. size)	L
WVTC T 4-R2-※	1/4	1/8	4.35	19	12	39.4
WVTC T 4-R4-※	1/4	1/4	4.35	19	14.29	45.5
WVTC T 4-R6-※	1/4	3/8	4.35	19	19	46
WVTC T 8-R4-※	1/2 (3/8)	1/4	4.35	26.99	14.29	45.5
WVTC T 8-R6-※	1/2 (3/8)	3/8	7.5	26.99	19	50.2
WVTC T 8-R8-※	1/2 (3/8)	1/2	10.2	26.99	22.23	53.2
WVTC T 12-R12-※	3/4	3/4	15.75	38.1	30	96.3

Welded Connector (Rc thread)

Part No	Size of VTF	T (RC thread)	φ D	H (Hex. size)	H₁ (Hex. size)	L
WVTSA 4-R2-※	1/4	1/8	4.35	19	14	42.5
WVTSA 4-R4-※	1/4	1/4	4.35	19	19	45.5
WVTSA 4-R6-※	1/4	3/8	4.35	19	22.23	49.8
WVTSA 8-R4-※	1/2 (3/8)	1/4	10.2	26.99	19	45.5
WVTSA 8-R6-※	1/2 (3/8)	3/8	10.2	26.99	22.23	49.8
WVTSA 8-R8-※	1/2 (3/8)	1/2	10.2	26.99	26.99	55.4
WVTSA 12-R12-※	3/4	3/4	15.75	38.1	33.34	85
WVTSA 16-R16-※	1	1	22.1	44.45	41.28	98

Welded Connector (NPT thread)
WVTSA（NPT thread）

Part No	Size of VTF	T (NPT thread)	φ D	H (Hex. size)	H₁ (Hex. size)	L
WVTSA 4-2-※	1/4	1/8	4.35	19	14	42.5
WVTSA 4-4-※	1/4	1/4	4.35	19	19	45.5
WVTSA 4-6-※	1/4	3/8	4.35	19	22.23	49.8
WVTSA 8-4-※	1/2 (3/8)	1/4	10.2	26.99	19	45.5
WVTSA 8-6-※	1/2 (3/8)	3/8	10.2	26.99	22.23	49.8
WVTSA 8-8-※	1/2 (3/8)	1/2	10.2	26.99	20.99	55.4
WVTSA 12-12-※	3/4	3/4	15.75	38.1	33.34	85
WVTSA 16-16-※	1	1	22.1	44.45	41.28	98

Welded BI-LOK Fitting Connector
WVTUB

Part No	Size of VTF	Size of BHLOK (φA)	φ D	H₁ (Hex. size)	H₂ (Hex. size)	H₃ (Hex. size)	L₁	L₂	L
WVTUB 4-4-※	1/4	6.35	4.35	19.05	12.7	14.29	15.4	41.8	49.3
WVTUB 4-6-※	1/4	9.53	4.35	19.05	15.88	17.46	17	42.5	50
WVTUB 4-8-※	1/4	12.7	4.35	19.05	20.64	22.23	23	43.5	53.8
WVTUB 8-4-※	1/2 (3/8)	6.35	10.2	26.99	15.88	14.29	15.4	43.1	50.6
WVTUB 8-6-※	1/2 (3/8)	9.53	10.2	26.99	15.88	17.46	17	45	52.5
WVTUB 8-8-※	1/2 (3/8)	12.7	10.2	26.99	20.64	22.23	23	47	57.3
WVTUB 12-6-※	3/4	9.53	15.75	38.1	20.64	17.46	17	68.6	76.1
WVTUB 12-8-※	3/4	12.7	15.75	38.1	20.64	22.23	23	68.6	78.9
WVTUB 12-12-※	3/4	19.05	15.75	38.1	26.99	25.88	24.6	88.9	99.2
WVTUB 16-8-※	1	12.7	22.1	44.45	26.99	22.23	23	84.6	94.9
WVTUB 16-16-※	1	25.4	22.1	44.45	34.93	38.1	31.6	87	100

Closed Coupling WVTGE

Part No	Size of VTF	φ D	H (Hex. size)	L
WVTGE 4-4-※	1/4	4.35	19	43.4
WVTGE 8-8-※	1/2 (3/8)	10.2	26.99	47.0
WVTGE 12-12-※	3/4	15.75	38.1	70.0

Reducing Closed Coupling WVTRGE

Part No	Size of VTF	Size of VTF	φ D	H (Hex. size)	H₁ (Hex. size)	L
WVTRGE 8-4-※	1/2	1/4	4.35	26.99	19	30.4

Welded Female Elbow WVTLA

Part No	Size of VTF	φ D	H (Hex. size)	L
WVTLA 4-4-※	1/4	4.35	19	25.4
WVTLA 8-8-※	1/2 (3/8)	10.2	26.99	28.6

Welded Female Tee WVTTA

Part No	Size of VTF	φ D	H (Hex. size)	L	2L
WVTTA 4-4-※	1/4	4.35	19	25.4	50.8
WVTTA 8-8-※	1/2 (3/8)	10.2	26.99	28.3	56.6

Welded Female Cross

Part No	Size of VTF	φ D	H (Hex. size)	L	2L
WVTXA 4-4-※	1/4	4.35	19	25.4	50.8
WVTXA 8-8-※	1/2 (3/8)	10.2	26.99	28.3	56.6

Welded Male-Female Elbow

Part No	Size of VTF	T (unified thread)	φ D	H (Hex. size)	h (Width flats)	L
WVTLS 4-4-※	1/4	9/16-18	4.35	19.05	17.0	30.0

Welded Male-Female Tee

Part No	Size of VTF	φ D	H (Hex. size)	h (Width flats)	L
WVTTS 4-4-※	1/4	4.35	19.05	17.0	30.0

Female Nut Adapter with NW Flange Welded VTF−NW＊−＊VF

Part No	Size of VTF	Size of NW Flange (φB)	t	H (Hex. size)	L
VTF-NW16-4VF-※	1/4	30	1.0	19.05	31.0
VTF-NW16-8VF-※	1/2 (3/8)	30	1.24	26.99	31.5
VTF-NW25-4VF-※	1/4	40	1.0	19.05	31.0
VTF-NW25-8VF-※	1/2 (3/8)	40	1.24	26.99	31.5
VTF-NW25-12VF-※	3/4	40	1.65	38.1	38.0
VTF-NW40-4VF-※	1/4	55	1.0	19.05	31.0
VTF-NW40-8VF-※	1/2 (3/8)	55	1.24	26.99	31.5
VTF-NW40-12VF-※	3/4	55	1.65	38.1	38.0
VTF-NW50-4VF-※	1/4	75	1.0	19.05	31.0
VTF-NW50-8VF-※	1/2 (3/8)	75	1.24	26.99	31.5

Male Nut Adapter with NW Flange Welded VTF−NW＊−＊VM

Part No	Size of VTF	Size of NW Flange (φB)	t	H (Hex. size)	L
VTF-NW16-4VM-※	1/4	30	1.0	15.88	46.2
VTF-NW16-8VM-※	1/2 (3/8)	30	1.24	23.81	48.5
VTF-NW25-4VM-※	1/4	40	1.0	15.88	46.2
VTF-NW25-8VM-※	1/2 (3/8)	40	1.24	23.81	48.5
VTF-NW25-12VM-※	3/4	40	1.65	33.34	54.6
VTF-NW40-4VM-※	1/4	55	1.0	15.88	46.2
VTF-NW40-8VM-※	1/2 (3/8)	55	1.24	23.81	48.5
VTF-NW40-12VM-※	3/4	55	1.65	33.34	54.6
VTF-NW50-4VM-※	1/4	75	1.0	15.88	46.2
VTF-NW50-8VM-※	1/2 (3/8)	75	1.24	23.81	48.5

Tube-end Adapter with NW Flange Welded VTF−NW＊−＊TW

Part No	Size of NW Flange (φB)	φ A	t	L
VTF-NW16-4TW-※	30	6.35	1.0	100
VTF-NW16-6TW-※	30	9.53	1.0	100
VTF-NW25-4TW-※	40	6.35	1.0	100
VTF-NW25-6TW-※	40	9.53	1.0	100
VTF-NW40-4TW-※	55	6.35	1.0	100
VTF-NW40-6TW-※	55	9.53	1.0	100
VTF-NW50-4TW-※	75	6.35	1.0	100
VTF-NW50-6TW-※	75	9.53	1.0	100

Female Nut VTNA

Part No	Size of VTF	φ M	H (Hex. size)	L
VTNA 2	1/8	5.15	11.1	13.5
VTNA 4	1/4	9.1	19	20.6
VTNA 8	1/2 (3/8)	15.5	26.99	22.4
VTNA 12	3/4	22.6	38.1	28.4
VTNA 16	1	30.5	44.45	34.0

Male Nut VTNB

Part No	Size of VTF	φ M	H (Hex. size)	L
VTNB 2	1/8	5.15	9.53	12.7
VTNB 4	1/4	8.9	15.88	18.3
VTNB 8	1/2 (3/8)	15.2	23.81	20.6
VTNB 12	3/4	22.4	33.34	25.4
VTNB 16	1	30.5	41.27	30.2

Short Male Nut VTNB＊S

Part No	Size of VTF	φ M	H (Hex. size)	L
VTNB 4S	1/4	8.9	15.88	13.7
VTNB 8S	1/2 (3/8)	15.2	23.81	15.6

Lock Nut VTNN

Part No	Size of VTF	T (unified thread)	H (Hex. size)	L
VTNN 2	1/8	5/16-24	11.11	6.0
VTNN 4	1/4	9/16-18	19	6.0
VTNN 8	1/2 (3/8)	7/8-14	26.99	8.0
VTNN 12	3/4	1・1/4-18	38.1	10.0
VTNN 16	1	1・1/2-20	47.63	12.5

Cap VTCA

Part No	Size of VTF	H (Hex. size)	L
VTCA 2	1/8	11.11	15.7
VTCA 4	1/4	19	23.5
VTCA 8	1/2 (3/8)	26.99	25.9
VTCA 12	3/4	38.1	31.2
VTCA 16	1	44.45	39.2

Plug VTBA

Part No	Size of VTF	H (Hex. size)	L
VTBA 2	1/8	9.53	17.3
VTBA 4	1/4	15.88	23.1
VTBA 8	1/2 (3/8)	23.81	27.4
VTBA 12	3/4	33.34	35.8
VTBA 16	1	41.27	38.6

IHARA SCIENCE CORPORATION

◆Features

◆Specification of Fitting

Working Pressure

Working Temperature Range

◆Nomenclature

◆Types

Long Gland for Male Nut

VTF− GD

VTGM、VTGL

VTGE、VTF−GE

VTGN、VTGT、VTF−GN

VTGC、SVTGC（Short type）

VTF−＊−BL

VTGB、VTF−GB

VTGAD

VTCT（NPT thread）

Male Connector (R thread) VTCT（R thread）

Male Connector (Straight thread) VTCU

VTSA（NPT thread）

Female Connector (Rc thread)

VTSA（Rc thread）

BI-LOK Fitting Connector VTUB

BI-LOK Bulkhead Fitting Connector VTSB

BI-LOK Fitting Bore Through Connector

Union VTUA、VTF−UA

Reduced Union VTUR

Bulkhead Union VTSU、VTF−SU

Bulkhead Connector for Tube Butt Weld VTST

Coupling VTCG

Reduced Adapter VTSS

Male Elbow (NPT thread) VTLN（NPT thread）

Male Elbow (R thread) VTLN（R thread）

Union Elbow VTLA、VTF−LA

Union Tee VTTA、VTF−TA

Reducing Tee VTTR

Union Cross VTXA、VTF− XA

Connector For Resin Tube Fitting VTEP

Elbow for Butt Weld VTLT

Tee for Butt Weld VTTT

Tee for Butt Weld VTKT

Bulkhead Tee for Butt Weld VTNT

Welded Connector (R thread)

Welded Connector (Rc thread)

Welded Connector (NPT thread) WVTSA（NPT thread）

Welded BI-LOK Fitting Connector WVTUB

Closed Coupling WVTGE

Reducing Closed Coupling WVTRGE

Welded Female Elbow WVTLA

Welded Female Tee WVTTA

Welded Female Cross

Welded Male-Female Elbow

Welded Male-Female Tee

Female Nut Adapter with NW Flange Welded VTF−NW＊−＊VF

Male Nut Adapter with NW Flange Welded VTF−NW＊−＊VM

Tube-end Adapter with NW Flange Welded VTF−NW＊−＊TW

Female Nut VTNA

Male Nut VTNB

Short Male Nut VTNB＊S

Lock Nut VTNN

Cap VTCA

Plug VTBA

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CONSTRUCTION

STEEL MATERIAL

LINK

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Weight Calculation

Welded Connector (NPT thread)
WVTSA（NPT thread）

Welded BI-LOK Fitting Connector
WVTUB