ASME B18.16.6:2017 Hex Flange Nylon Insert Lock Nut combines a flange bearing surface with nylon insert locking performance. The flange helps distribute clamping force, while the nylon insert provides prevailing torque to maintain thread engagement.
This product is suitable for vehicles, construction machinery, sheet-metal brackets, conveying equipment, and assemblies exposed to vibration. The integrated structure can reduce washer use and simplify the assembly process, making it practical for volume production.
Materials, strength levels, and surface coatings can be selected according to application conditions to balance rust protection, locking performance, and long-term reliability.

Dimensions unit: inch
|
Nominal diameter d |
1/4 |
5/16 |
3/8 |
7/16 |
1/2 |
9/16 |
5/8 |
3/4 |
|
|
d |
0.25 |
0.3125 |
0.375 |
0.4375 |
0.5 |
0.5625 |
0.625 |
0.75 |
|
|
PP |
Coarse teeth /UNC |
20 |
18 |
16 |
14 |
13 |
12 |
11 |
10 |
|
Fine Teeth/UNF |
28 |
24 |
24 |
20 |
20 |
18 |
18 |
16 |
|
|
s |
Max. |
0.4385 |
0.502 |
0.5645 |
0.6895 |
0.752 |
0.877 |
0.9395 |
1.127 |
|
Min. |
0.428 |
0.489 |
0.551 |
0.675 |
0.736 |
0.861 |
0.922 |
1.088 |
|
|
e |
Max. |
0.505 |
0.577 |
0.65 |
0.794 |
0.866 |
1.01 |
1.083 |
1.299 |
|
Min. |
0.488 |
0.557 |
0.628 |
0.768 |
0.84 |
0.982 |
1.051 |
1.24 |
|
|
h |
Max. |
0.3 |
0.365 |
0.425 |
0.495 |
0.555 |
0.625 |
0.69 |
0.825 |
|
mw |
Min. |
0.14 |
0.17 |
0.2 |
0.23 |
0.26 |
0.29 |
0.32 |
0.38 |
|
c |
Min. |
0.04 |
0.05 |
0.06 |
0.07 |
0.08 |
0.09 |
0.1 |
0.11 |
|
dc |
Max. |
0.56 |
0.68 |
0.81 |
0.93 |
1.07 |
1.19 |
1.33 |
1.585 |
|
dw |
Min. |
0.484 |
0.602 |
0.73 |
0.846 |
0.982 |
1.101 |
1.23 |
1.472 |
ABOUT US
Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010.
The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.
With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.
Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery
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