ASME B18.16.4 Serrated Hex Flange Locknuts
Product introduction
ASME B18.16.4 specifies serrated hex flange locknuts with a performance requirement of 90,000 psi. These nuts feature an integrated flange with serrated teeth that provide prevailing torque locking action, eliminating the need for separate lock washers. The standard covers both Grade 5 and Grade 8 strength levels.
Common Specifications
|
Materials |
Carbon steel |
|
Class |
5, 6, 8, 10 |
|
Range |
#6 - 5/8″ |
|
Thread |
Coarse , Fine, Extra Fine, Special-Fine |
|
Surface |
Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Serrated flange provides prevailing torque locking
- 90,000 psi performance requirement
- Integrated flange eliminates separate lock washers
- Conforms to ASME B18.16.4 specifications
- Available in Grade 5, 6, 8, 10
Application industry
- Automotive suspension and chassis
- Heavy equipment manufacturing
- Industrial machinery with vibration
- North American fastener market
data table
| Size | 6# | 8# | 10# | 12# | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 |
| UNC | 32 | 32 | 24 | 24 | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 |
| s Min (inch) | 0.302 | 0.334 | 0.365 | 0.428 | 0.428 | 0.489 | 0.551 | 0.675 | 0.736 | 0.861 | 0.922 | 1.088 |
| s Max (inch) | 0.312 | 0.344 | 0.375 | 0.438 | 0.438 | 0.500 | 0.562 | 0.688 | 0.750 | 0.875 | 0.938 | 1.125 |
| e Min (inch) | 0.342 | 0.381 | 0.416 | 0.488 | 0.488 | 0.557 | 0.628 | 0.768 | 0.840 | 0.982 | 1.051 | 1.240 |
| e Max (inch) | 0.361 | 0.397 | 0.433 | 0.505 | 0.505 | 0.577 | 0.650 | 0.794 | 0.866 | 1.010 | 1.083 | 1.299 |
| m Min (inch) | 0.156 | 0.187 | 0.203 | 0.222 | 0.222 | 0.268 | 0.330 | 0.375 | 0.437 | 0.483 | 0.545 | 0.627 |
| m Max (inch) | 0.171 | 0.203 | 0.219 | 0.236 | 0.236 | 0.283 | 0.347 | 0.395 | 0.458 | 0.506 | 0.569 | 0.675 |
| dc Min (inch) | 0.406 | 0.452 | 0.480 | 0.574 | 0.574 | 0.660 | 0.728 | 0.910 | 1.000 | 1.155 | 1.248 | 1.460 |
| dc Max (inch) | 0.422 | 0.469 | 0.500 | 0.594 | 0.594 | 0.680 | 0.750 | 0.937 | 1.031 | 1.188 | 1.281 | 1.500 |
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