Hard Lock Nut Teklif Al

  • Simple - Only a spanner wrench required for installation
  • Safe - Ideal for applications where reliability is critical
  • Secure - Exceedingly high anti-loosening effect

How the Hard Lock Nut Works:

 

Figure 1 - Forcing a wedge into the gap between the cylinder and its surrounding tube makes it possible to create a powerfully locked assembly.

 

Figure 2 - Creating matching key grooves in both the nut and bolt, and then using a hammer to drive a wedge into those grooves does provide a powerful self-locking effect. However, this method is unsatisfactory from the standpoint of operability.

 

Figure 3 - The solution is to use two nuts to play the roles of the hammer and wedge respectively. A small eccentricity in the sliding part of the convex top of the lower nut acts as the wedge. When the concave upper nut is tightened, the effect produced is exactly the same as that produced by a hammer driving in a wedge. Moreover, it is much more effective to use a screw as this makes it very easy to force the wedge into place.

Hard Lock Nut Standard Dimensions (inch)

Hard Lock Nut Standard Dimensions (mm)

SH (lower nut)H1 (upper nut)B (width)Cℓ (total height)hSet/
Weight
MarginCoarseFineStd. Dimen.Toler-anceStd. Dimen.Toler-anceStd. Dimen.Toler-anceApproxApproxApproxg
M61.0-50
-0.48
50
-0.48
100
-0.6
11.58.33.33.3
M81.251.06.50
-0.58
6.50
-0.58
130
-0.7
15114.58.6
M101.51.258//8//17//19.613.55.517.6
M121.751.510//10//190
-0.8
21.9177.027.3
M142.01.5110
-0.7
110
-0.7
22//25.418.57.539
M162.01.513//13//24//27.722.59.552.8
M182.51.515//15//27//31.225.510.580
M202.51.516//16//30//34.627.511.5105
M222.51.518//18//320
-1.0
3731.513.5130
M243.02.0190
-0.84
190
-0.84
36//41.63314180
M273.02.0220
-1.84
220
-1.84
41//47.33816246
M303.52.0240
-1.84
240
-1.84
46//53.14218375
M333.52.0260
-1.84
260
-1.84
50//57.74620480
M364.03.0290
-1.84
290
-1.84
550
-1.2
63.55021630
M394.03.0310
-2.0
310
-2.0
60&69.35423935
M424.54.0340
-2.0
340
-2.0
65//7559251080
M454.54.0360
-2.0
360
-2.0
70//80.863271330
M485.04.0380
-2.0
380
-2.0
75//86.567291595
M525.04.0420
-2.0
420
-2.0
80//92.475332055
M565.54.0450
-2.0
450
-2.0
850
-1.4
98.179342410
M646.04.0510
-2.2
510
-2.2
95//11089383172

 

Lower nut (tightening nut)Upper nut
(locking nut)
Material classification: Tightening torque
standard reference value list (Unit: Nm)
Materials are uniform
Class4 (SS400 or equivalent)Class8 (S45C or equivalent)Class10 (SCM435 or equivalent)A2,A4
(SUS304, 306 or equivalent)
Tightening torque (Unit Nm)
4.8(320N/m㎡8.8(640N/m㎡)10.9(900N/m㎡)50(210N/m㎡)70(450N/m㎡)
2.3~6--1.5~43.3~94~5
5.6~1511.2~3015.8~423.7~107.9~219~13
11~3022~5931~847~2016~4218~24
19~5239~10455~14613~3427~7327~39
31~8262~16587~23220~5444~11640~58
48~12997~257136~36232~8468~18170~100
66~177133~354187~49844~11693~249100~150
94~251188~502265~70662~165132~353120~200
128~341256~683360~96084~224180~480150~250
163~434325~868458~1220107~285229~610160~300
238~635458~1269669~1785156~416335~892250~390
323~862646~1723909~2424212~566454~1212270~440
440~1173879~23451237~3298289~770618~1649290~490
565~15061129~30121588~4235371~988794~2118340~590
731~19491462~38982056~5481480~12791028~2741390~640
904~24111808~48212542~6780593~15821271~3390440~690
1128~33092257~60183174~8463741~19751587~4231490~740
1358~36202715~72403818~10181891~23761909~5091540~780
1755~46813510~93614937~131641152~30722468~6582590~830
2183~58204365~116416139~163701432~38203069~8185640~880
3288~87696577~175379248~246622158~57554624~12331690~930

Thin Type Dimensions

SH (lower nut)H1 (upper nut)B (width)Cℓ (total height)hUper nut tight. torque SS400
Nm)
MarginCoarseStd. Dimen.ToleranceStd. Dimen.ToleranceStd. Dimen.ToleranceApproxApproxApprox
M162.0100
-0.58
100
-0.58
240 -0.827.716.56.570~100
M182.5110
-0.7
110
-0.7
27//31.217.56.2100~150
M202.512//12//30//34.619.57.5120~200
M222.513//13//320
-1.0
3721.58.5150~250
M243.014//14//36//41.6239.0160~300
M273.016//16//41//47.32610250~390
M303.518//18//46//53.13012270~440
M333.5200
-0.84
200
-0.84
50//57.73413290~490
M364.021//21//550
-1.2
63.53413340~590
M394.023//23//60//69.33814390~640
M424.525//25//65//754015440~690
M454.527//27//70//80.84518490~740
M485.029//29//75//86.54920540~780
M525.0310
-1.0
310
-1.0
80//92.45322590~830
M565.534//34//850
-1.4
98.15723640~880
M646.038//38//95//1106325690~930

*This product's lower nut tightening torque is approx. 60 ~ 80% of that of the «H-1» lower nut.

Semi Thin Type Dimensions

SH (lower nut)H1 (upper nut)B (width)Cℓ (total height)hUper nut tight. torque SS400
(Nm)
MarginCoarseStd. Dimen.ToleranceStd. Dimen.ToleranceStd. Dimen.ToleranceApproxApproxApprox
M162.0130
-0.7
100
-0.58
240 -0.827.719.59.570~100
M182.5150
-0.7
110
-0.7
27//31.221.510.5100~150
M202.516//12//30//34.623.511.5120~200
M222.518//13//320
-1.0
3726.513.5150~250
M243.0190
-0.84
14//36//41.62814160~300
M273.022//16//41//47.33216250~390
M303.524//18//46//53.13618270~440
M333.526//200
-0.84
50//57.74020290~490
M364.029//21//550
-1.2
63.54621340~590
M394.0310
-1.0
23//60//69.34623390~640
M424.534//25//65//755025440~690
M454.536//27//70//80.85427490~740
M485.038//29//75//86.55829540~780
M525.042//310
-1.0
80//92.46433590~830
M565.545//34//850
-1.4
98.16834640~880
M646.0510
-1.2
38//95//1107838690~930
dsem & m1L

Unit Weight

Normal Size or Basic Major Dia. of ThreadWidth Across FlatsWidth Across CornersThickness Hex NutsOverall Height
BasicMax.Min.Max.Min.BasicMax.Min.Approx.Approx.
UNC 1/40.25007/160.4380.4280.5050.4887/320.2260.2120.3703.3
UNC 5/160.31251/20.5000.4890.5770.55717/640.2730.2580.4337.9
UNC 3/80.37509/160.5620.5510.6500.62821/640.3370.3200.53517.6
UNC 7/160.437511/160.6880.6750.7940.7683/80.3850.3650.61020.8
UNC 1/20.50003/40.7500.7360.8660.8407/160.4480.4270.72428.1
UNC 5/80.625015/160.9380.9221.0831.05135/640.5590.5150.93752.8
UNC 3/40.75001-1/81.1251.0881.2991.24041/640.6650.5971.106105.0
UNC 7/80.87501-5/161.3121.2691.5161.4473/40.7760.7041.307130.0
UNC 11.00001-1/21.5001.4501.7321.65355/640.8870.8111.500246

 

Tightening Torque

SizeConcave Nut
UNC 1/44 - 5 N•m
UNC 5/169 -13 N•m
UNC 3/818 - 24 N•m
UNC 7/1627 - 39 N•m
UNC 1/240 - 58 N•m
UNC 5/870 - 100 N•m
UNC 3/4120 - 150 N•m
UNC 7/8150 - 250 N•m
UNC 1250 - 390 N•m

*This product's lower nut tightening torque is the same as that of the«H-1» lower nut.