, ,

HARDLOCK Thin Type Nut Basic

Product: Made in Japan
Manufacturer: HARDLOCK
Basic Thin Type M16,M18,M20,M22,M24,M27,M30,M33,M36,M39,M42,M45,M48,M52,M56,M64,M68,M72,M76,M80,M85,M90,M95,M100,M105,M110,M115,M120,M125,M130

HARDLOCK Nut provides unparalleled self locking performance even in the toughest environments and applications

When you need fail safe fastening performance in the most demanding vibration environment, trust HARDLOCK Nuts (HLN) to meet or exceed your expectations.

The primary reason for loosening in bolted joints is a drop in the initial clamp load occurring due to external forces such as impact and vibration, to battle this you need to eliminate the play (gap) between the threads of the bolt and nut.
Play will lead to not only shortened life span but also bolt brakeage which can result in catastrophic accidents.

We hit on the idea of utilizing the wedge principle, widely used in ancient Japanese architecture.

Thanks to the design inspired by the principle, HLN completely eliminates the play between the threads and
withstands severe vibration longer than any other nuts in the world.
HLN consists of two nuts, the first nut 1 “Convex Nut” (clamping nut) has an eccentric protrusion on the upper surface.

The second nut 2 “Concave Nut” (locking nut) is designed with a concentric recess for
locking the two nuts together. By tightening the Concave Nut onto the Convex Nut, a strong
perpendicular load will be applied to the bolt from both sides locking the HLN and making it resistant to
vibrations and impacts from any direction.

After installing HLN you will realize a significant decrease in maintenance related work due to its exceptional self locking effect. This will offer improvement of running cost, though HLN is a high end product, in combination with the advantage that it can be reused multiple times without almost any decrease in performance. HLN is entirely made from metal only unlike other common self locking nuts and is available in various materials and surface treatment suitable for any environment. HLN is predominantly used in applications which require safety at higher level in extreme conditions and environments, including but not limited to; Railway, Mining, Civil engineering and Machinery, just to name a few.

 

HARDLOCK NUT INSTALLATION

      1. Use a tightening tool (spanner, torque wrench etc.) to tighten
        the Convex Nut to the appropriate torque for the applicationThe convex nut has the same strength class as a regular
        hexagon nut and can therefore be tightened to its maximum
        limit.
      2. Install the Concave nut onto the Convex nut manually by
        hand until it no longer turns (in other words, until prevailing
        torque is generated). Make sure that there is a gap of more
        than 1 thread pitch between the nuts.
        If the gap is less than 1 pitch, there may be a chance that
        sufficient locking effect will not be produced so please
        refrain from using HARDLOCK NUT with the bolt.
        (The same conditions apply for reuse.)
      3. Use a torque wrench to tighten the Concave nut with the
        recommended torque set by HARDLOCK Industry Co., Ltd
        Even after correctly tightening the Concave nut with the
        torque within the range of recommended tightening
        torque, there may remain a gap between the nuts due to the tolerance of bolt diameter.
        Even in this condition, sufficient locking effect is secured but the Concave nut can be further tightened to come into one sided contact or full contact even with more torque than the recommended torque to better ensure locking effect. If it is difficult to manage the tightening torque of the Concave nut, please use “one sided contact” as a guide for ensuring locking power. When tightening the Concave nut on to the Convex nut, one side of the nuts will first come into contact, which gives an indication of sufficient locking effect (The Concave nut will slightly incline after the contact between the protrusion and the recess.). When one sided contact is achieved, the tightening torque rapidly increases. By applying additional torque , the nuts will come into full contact . This state produces the ultimate locking effect of the HARDLOCK NUT, but further tightening may cause the breakage of bolt threads. It is recommended to stop tightening the concave nut when the nuts come into full contact even though the applying torque is less than the maximum of recommended tightening torque.

Standard materials and coatings

Material Coating
Class 4/low-carbon steel (JIS SS400 equivalent) Electrogalvanized (trivalent chromate)
Hot-dip galvanized (HDZ35)
Class 8/medium-carbon steel (JIS S45C) Manganese Phosphate coating
A2/stainless steel (JIS SUS304 or equivalent) Unplated/plain

Dimension table (M16–M130)

d Pitch Convex nut Convex nut Width across flats e Overall height Unit weight
P m m1 s g
Nominal size Coarse Fine Basic Tolerance Basic Tolerance Basic Tolerance Approx Approx
Approx
M16 2.0 1.5 10 0
-0.8
10 0
-0.8
24 0
-0.8
27.7 16.3 36
M18 2.5 1.5 11 0
-0.9
11 0
-0.9
27 0
-0.8
31.2 17.8 52
M20 2.5 1.5 12 0
-0.9
12 0
-0.9
30 0
-0.8
34.6 19.3 67
M22 2.5 1.5 13 0
-0.9
13 0
-0.9
32 0
-1.0
37.0 21.4 81
M24 3.0 2.0 14 0
-0.9
14 0
-0.9
36 0
-1.0
41.6 22.9 116
M27 3.0 2.0 16 0
-1.4
16 0
-1.4
41 0
-1.0
47.3 25.9 176
M30 3.5 2.0 18 0
-1.4
18 0
-1.4
46 0
-1.0
53.1 29.9 260
M33 3.5 2.0 20 0
-1.5
20 0
-1.5
50 0
-1.0
57.7 33.4 344
M36 4.0 3.0 21 0
-1.5
21 0
-1.5
55 0
-1.2
63.5 33.9 424
M39 4.0 3.0 23 0
-1.5
23 0
-1.5
60 0
-1.2
69.3 37.5 556
M42 4.5 4.0 25 0
-1.5
25 0
-1.5
65 0
-1.2
75.0 41.0 730
M45 4.5 4.0 27 0
-1.5
27 0
-1.5
70 0
-1.2
80.8 45.0 923
M48 5.0 4.0 29 0
-1.5
29 0
-1.5
75 0
-1.2
86.5 49.0 1,169
M52 5.0 4.0 31 0
-1.5
31 0
-1.5
80 0
-1.2
92.4 52.5 1,428
M56 5.5 4.0 34 0
-1.5
34 0
-1.5
85 0
-1.4
98.1 57.5 1,687
M64 6.0 4.0 38 0
-1.5
38 0
-1.5
95 0
-1.4
110 63.5 2,304
M68 40 0
-1.7
40 0
-1.7
100 0
-1.4
115 66.6 3,030
M72 42 0
-1.7
42 0
-1.7
105 0
-1.4
121 68.6 3,060
M76 46 0
-1.7
46 0
-1.7
110 0
-1.4
127 76.6 3,740
M80 48 0
-1.7
48 0
-1.7
115 0
-1.4
133 80.6 4,250
M85 50 0
-1.7
50 0
-1.7
120 0
-1.4
139 82.6 4,610
M90 54 0
-2.0
54 0
-2.0
130 0
-1.6
150 90.6 5,900
M95 57 0
-2.0
57 0
-2.0
135 0
-1.6
156 95.6 6,770
M100 60 0
-2.0
60 0
-2.0
145 0
-1.6
167 100.6 8,430
M105 63 0
-2.0
63 0
-2.0
150 0
-1.6
173 105.6 9,250
M110 65 0
-2.0
65 0
-2.0
155 0
-1.6
179 107.6 11,750
M115 69 0
-2.0
69 0
-2.0
165 0
-1.6
191 115.6 12,280
M120 72 0
-2.0
72 0
-2.0
170 0
-1.6
196 120.6 13,330
M125 76 0
-2.0
76 0
-2.0
180 0
-1.6
208 128.6 16,290
M130 78 0
-2.0
78 0
-2.0
185 0
-1.6
214 130.6 17,150

• Nut shape: JIS B1181 (2004)/ISO 4032
• Screw precision: JIS B0209 (2001)/ISO 261 – 6H

Tightening torque table (M16–M130)

Nominal size Pitch Reference tightening torque for convex nut
*70% of the bolt yield point
Recommended tightening torque for convex nut
Class 4 (SS400 or equivalent) Class 8 (S45C) A2/stainless steel
(JIS SUS304 or equivalent)
Common to all materials
(min.–max.)
4.8
(320 N/mm²)
8.8
(640 N/mm²)
A2-50 A2-70
Trivalent chromate HDZ35 Manganese Phosphate coating Plain
M16 2.0 84 197 170 55 120 70–100
M18 2.5 115 270 230 76 165 100–150
M20 2.5 165 384 330 110 230 120–200
M22 2.5 225 523 450 145 315 150–250
M24 3.0 285 664 570 185 400 160–300
M27 3.0 415 972 835 275 585 250–390
M30 3.5 565 1,319 1,130 370 790 270–440
M33 3.5 770 1,795 1,540 505 1,080 290–490
M36 4.0 990 2,305 1,975 650 1,390 340–590
M39 4.0 1,280 2,985 2,555 840 1,800 390–640
M42 4.5 1,580 3,690 3,160 1,035 2,225 440–690
M45 4.5 1,980 4,620 3,960 1,300 2,785 490–740
M48 5.0 2,370 5,530 4,740 1,555 3,335 540–780
M52 5.0 3,075 7,175 6,150 2,020 4,325 590–830
M56 5.5 3,820 8,915 7,640 2,505 5,370 640–880
M64 6.0 5,765 13,445 11,525 3,780 8,105 690–930
M68 6,980 16,287 13,960 4,581 9,816 Tighten about 1 turn after tightening manually
M72 8,370 19,531 16,741 5,493 11,771
M76 9,931 23,172 19,862 6,517 13,965
M80 11,677 27,246 23,353 7,663 16,420
M85 14,131 32,973 28,263 9,274 19,872
M90 16,907 39,450 33,814 11,095 23,776
M95 20,023 46,721 40,047 13,140 28,158
M100 23,503 54,841 47,006 15,424 33,051
M105 27,363 63,847 54,726 17,957 38,479
M110 31,623 73,787 63,246 20,753 44,470
M115 36,302 84,705 72,605 23,823 51,050
M120 41,425 96,658 82,850 27,185 58,254
M125 47,006 109,682 94,013 30,848 66,103
M130 53,067 123,823 106,134 34,825 74,625

Kouei is Distributor/Agent of Hard Lock Nut

Other items of Hard Lock Nut

Request the quotation for Hard Lock Nut

REQUEST QUOTATION

PAYMENT

payment-methods

 

TOOLS & EQUIPMENT

Lifting
Eagle Clamp | Eagle Jack | Elephant | Endo Kogyo
Japan Clamp | Kanetec | Jung | KITO | Katsuyama Kikai
Kondotec | Miki Netsuren | Sanei Seiki | Taiyo

Hand Tools
Bix | Miyakawa | Nakatani Kikai | Ogura | Osakada Tool
Super Tool | TONE | Yutani

Tape
Kamoi | Kikusui | Misuzu | Nirei | Okamoto | Taiho | Teraoka

Measurement
Hasegawa | Kawaki | Kett | KGK | Line Seiki | Nagano Keiki
Niigata Seiki | Obishi Keiki | RSK | Ryoden Shonan | Sanko
Sanwa Supply | Showa Seisakusho | Showa Sokki
SK Sato | Tokyo Keiso | Tokyo Sokushin

Safety Tools
Fujii Denko | Shigematsu | Titan

Welding
Asahi Weldex | Daihen | Koike | Nissan Tanaka

Drilling
Dijet | Kansai Kogu | Nitto Kohki | Okazaki Seiko | Takeda

Chemical
Cemedine | DaitoNippon Grease | Taseto

Other Tools
Hammer Caster | Kitagawa | Matsuda Seiki | Misuz | Sanritsu
Sanyutec | Shizuoka Seiki | Toyo Kensetsu Kohki | Yamamoto
Yamari

PLANT FACILITIES

Facilities
Acokk | Bunkaboeki | Horiuchi | Konan | Murakoshi
Murakoshi Industries | Nesstech | Nihon Flux | Nikkin Flux
NFK | Omega System | Organo | Taiyo Parker | Toyo Mic

Pump
Dynaflo | Ebara | Honda Kiko | KyowaMusashino
Tsurumi

Valve
Astam | Kyowa Iron | Nachi | Nippon Daiya | Sawada
Wasino Kiki | Yoshitake

Electricity
Arkon | Asahi Bagnal | Gentos | Iwasaki | Kokosha | U_RD

CONSTRUCTION

Concrete Work
Daia | EXEN | Japan Life | Mikasa | Okasan Kiko | Taiheiyo

Railway Work
Kyoei | Sanwa Tekki | Teikoku | Toko

Scaffolding
Bullman | Okabe | Rikiman | Tsugaru

High Tension Bolt
Dong Ah | KPF | Nippon Steel Bolten | Nippon Fastener

Bolt & Nut & Washer
Hard Lock | Kishu Fastener | Matsukin | Mori Kozai
Nakaumi | Naniwa | Ogawa | Otani | Sudo | Toneji

STEEL MATERIAL

Steel & other Material
Dongil | JIS Standard | DSR | Sumitomo Wire | Winoa IKK

Pipe
Benkan

Return Top