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NIPPON STEEL BOLTEN – SHTB Torque Type Super High Strength Bolt

Made in Japan
Manufacturer: Nippon Sumikin Bolten
Model: SHTB

Features

  • SHTB is an epoch-making bolt that overcomes delayed fracture by adopting bolt shape and new thread shape which can mitigate stress concentration, development of material excellent in delayed fracture resistance, and about 1.5 of conventional bolt (F10T) We realized ultrahigh strength as doubled.
  • I obtained the certification of the Minister of Land, Infrastructure, Transport and Tourism (certification number: MBLT – 0113).
  • By adopting SHTB, many merits such as compact bolt joint, reduced bolt tightening cost, shortened construction period, etc. are obtained.
  • Construction has the same efficient tightening workability as the conventional Torsha type high-strength bolt.

Conceptual diagram of fitting compactification

Size Chart

Weight of bolt (unit: g)

Neck LengthBolt type
SHTB 16SHTB 20SHTB 22SHTB 24
50222
55230378
60238391526
65246404541714
70254417556732
75262430571750
80270443586768
85278456601786
90286469616804
95294482631822
100302495646840
105310508661858
110521676876
115534691894
120547706912
125560721930
130573736948
135751966
140766984
1457811002
1501020
1551038
1601056

Bolt length

Please choose the bolt’s neck length by adding the following length to the tightening length (the total thickness of the steel to be tightened).

Bolt typeAdd length (mm)(Note)
It is 5 mm longer than the “added length” of the conventional TC bolt.
SHTB 1630
SHTB 2035
SHTB 2240
SHTB 2445

standard

Mechanical properties of bolt

standardProof stress (N / mm²)Tensile strength (N / mm²)Elongation (%)Aperture (%)Hardness (HRC)
SHTB1,260 or more1,400 to 1,49014 or more40 or more39 – 47

Design proof

Bolt typeLong-term tolerable capacity (kN)Short term permissible proof stress (kN)
1-sided shearTwo-sided shearTension1-sided shearTwo-sided shearTension
SHTB 1646929269138139
SHTB 2072143144107215217
SHTB 2287173175130260262
SHTB 24103206208155309312
Bolt typeMaximum yield strength (kN)
1-sided shearTwo-sided shearTension
SHTB 16169338230
SHTB 20264528358
SHTB 22319639442
SHTB 24380760517

Design bolt tension

Bolt typeEffective cross section (mm²)Reference tensionTensile long-term permissible stressDesign bolt tension (kN)Standard bolt tension (kN)
SHTB 16164760 (N / mm²)460 (N / mm²)155171
SHTB 20256242266
SHTB 22316299329
SHTB 24369349384

Here, the reference value of material strength (specified proof stress) = 1260 (N / mm²).
Remarks: Design bolt tension = effective cross-sectional area × specified proof stress × 75%
standard bolt tension = 10% increase of design value (same concept as S10T)

Introduction tension

Bolt typeIntroduced tension average value at normal temperature (kN)Introduced tension average value (kN) other than room temperature
SHTB 16161 to 193155 to 203
SHTB 20252 to 302242 to 317
SHTB 22311 to 373299-391
SHTB 24363 to 435349 to 457

Standard sign (Certification number of the Minister of Land, Infrastructure, Transport and Tourism)

standardRemarksCertification number
SHTBMinister of Land, Infrastructure, Transport and Tourism General Certification StandardMBLT-0113

Construction

It has the same efficient tightening workability as the conventional Torsha type high-strength bolt.

  1. Fully insert the inner sleeve into the bolt grip, then gently press the clamping machine and snap the outer sleeve onto the nut.
  2. Switch on the clamping machine.
    The outer sleeve is rotated and tightened, and when the specified torque is reached the rupture groove is cut.
  3. When the fracture groove breaks, switch off, simultaneously pull the tightening machine toward you and remove the outer sleeve.
  4. Pull the tip lever and pull out the pin tail of the inner sleeve.

【Precautions for use】

  • Please use SHTB in indoor environment. Also, please do not use it indoors under the corrosive environment such as hot spring facilities, hot water pool etc. (For delayed breakdown prevention) If you are unsure about the use environment, please consult us.
  • 12 G SHTB (12 G hot dip galvanized high strength hexagon bolt) is available for outdoor use, so please consult us separately.
  • Since the introduction tension of SHTB is higher than ordinary high tension bolt, please use the corresponding tightening machine.
  • When tightening, please check the mark of the bolt head.

SHTB compliant tightening machine list

Primary tightening model list
Bolt typeShear runner typeShear wrench type
SR-31SR-51KS-2024-1KS-4001 B6922K
SR-32SR-52KS-2024-2KS-4002B
SHTB 16
SHTB 20
SHTB 22
SHTB 24
Torque range150 to 300 N · m300 to 500 N · m160 to 310 N · m300 to 500 N · m118 to 225 N · m
Machine type list for final tightening
Bolt typeM-201 RATGM-201ATGM-221 ATGH-241ATV301T6924N
M-202 RATGM-202ATGM-222ATGH-242ATV302T
SHTB 16
SHTB 20
SHTB 22
SHTB 24

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