ASME B18.6.3 Torx Socket Head Cap Screws
ASME B18.6.3 Torx socket head cap screws feature a cylindrical head and a six-lobe star-shaped drive designed for secure tool engagement and efficient torque transmission. The Torx drive helps reduce cam-out during installation and provides reliable performance in repetitive assembly operations. These screws are available in a range of inch sizes and lengths to meet different fastening requirements in machinery, equipment, and general industrial applications.
We manufacture Torx socket head screws using specialized cold heading and thread rolling equipment to ensure consistent dimensions and thread quality. Depending on the application, different materials, finishes, and dimensional specifications can be supplied. We also support customized requirements based on customer drawings, providing fastener solutions for a variety of industrial assembly needs.
Specification:
| Item | Specification |
|---|---|
| Standard | ASME/ANSI B18.3 |
| Product Type | Torx Socket Head Cap Screws |
| Head Style | Cylindrical Head |
| Drive Type | Torx/6-Lobe |
| Thread Standard | ASME B1.1 |
| Thread Series | UNC/UNF |
| Material | Alloy Steel,Stainless Steel |
| Alloy Steel Standard | ASTM A574 |
| Stainless Steel Standard | ASTM F837 |
| Surface Treatment | Zinc Plated, Black Oxidation,Bright Finish,Passivation |
Dimension Chart of ASME B18.6.3 Torx Socket Head Cap Screws:
| Mon | #2 | #3 | #4 | #5 | #6 | #8 | #10 | #12 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 1 |
| P | 56|64 | 48|56 | 40|48 | 40|44 | 32|40 | 32|36 | 24|32 | 24|28|32 | 20|28|32 | 18|24|32 | 16|24|32 | 14|20|28 | 13|20|28 | 12|18|24 | 11|18|24 | 10|16|20 | 9|14|20 | 8|12|20 |
| dk max | 0.14 | 0.161 | 0.183 | 0.205 | 0.226 | 0.27 | 0.312 | 0.324 | 0.375 | 0.469 | 0.562 | 0.656 | 0.75 | 0.843 | 0.938 | 1.125 | 1.312 | 1.5 |
| dk min | 0.134 | 0.154 | 0.176 | 0.198 | 0.216 | 0.257 | 0.298 | 0.314 | 0.354 | 0.446 | 0.54 | 0.631 | 0.725 | 0.827 | 0.914 | 1.094 | 1.291 | 1.476 |
| k max | 0.086 | 0.099 | 0.112 | 0.125 | 0.138 | 0.164 | 0.19 | 0.216 | 0.25 | 0.312 | 0.375 | 0.438 | 0.5 | 0.562 | 0.625 | 0.75 | 0.875 | 1 |
| k min | 0.083 | 0.095 | 0.108 | 0.121 | 0.134 | 0.159 | 0.185 | 0.21 | 0.244 | 0.306 | 0.368 | 0.43 | 0.492 | 0.554 | 0.616 | 0.74 | 0.864 | 0.988 |
| No. | T8 | T8 | T10 | T10 | T15 | T25 | T27 | T27 | T30 | T45 | T50 | T55 | T55 | T60 | T70 | T90 | T100 | T100 |
| e | 0.094 | 0.094 | 0.111 | 0.111 | 0.132 | 0.178 | 0.2 | 0.2 | 0.221 | 0.312 | 0.352 | 0.446 | 0.446 | 0.529 | 0.619 | 0.795 | 0.882 | 0.882 |
| t min | 0.033 | 0.038 | 0.05 | 0.05 | 0.06 | 0.08 | 0.085 | 0.085 | 0.115 | 0.13 | 0.166 | 0.19 | 0.205 | 0.23 | 0.31 | 0.34 | 0.43 | 0.49 |
Application:
Machinery and Industrial Equipment
Torx socket head cap screws are used in machinery, mechanical assemblies, and industrial equipment where secure fastening and consistent installation are required.
Automotive and Transportation Equipment
These screws can be used in vehicle components, transport equipment, and related mechanical assemblies where reliable torque transmission and secure tool engagement are important.
Electrical and Electronic Equipment
Torx socket head screws are suitable for fastening components, housings, and structural parts in electrical equipment and electronic assemblies.