ASME B18.3 Torx Button Head Cap Screw
ASME B18.3 Torx Button Head Cap Screws feature a rounded, low-profile head and a six-lobe Torx drive. The smooth head profile provides a neat finish, while the Torx recess offers reliable driver engagement and efficient torque transmission during installation. These screws are suitable for applications where a compact head design, secure fastening, and a clean appearance are required.
Our production capabilities include cold heading, thread rolling, and precision machining to manufacture button head screws with consistent dimensions and reliable quality. We can produce a range of sizes and specifications to meet different application requirements, with quality checks covering critical dimensions, thread accuracy, and overall product consistency.
Specification:
| Item | Specification |
|---|---|
| Standard | ASME B18.3 |
| Product Type | Torx Button Head Cap Screw |
| Size Range | #1-5/8" |
| Thread | UNC,UNF |
| Thread Standard | ASME B1.1 |
| Thread Tolerance | 2A |
| Material | Carbon Steel,Alloy Steel, Stainless Steel |
| Surface | Black Oxidation,Zinc Plated,Bright Finish,Passivation |
| Inspection | Dimensions, Thread,Mechanical Property,Coating |
Dimension Chart of ASME B18.3 Torx Button Head Cap Screw:
| Mon | #1 | #2 | #4 | #5 | #6 | #8 | #10 | 1/4 | 5/16 | 3/8 | 1/2 | 5/8 |
| P | 64 | 56 | 40 | 40 | 32 | 32 | 24 | 20 | 18 | 16 | 13 | 11 |
| dk max | 0.139 | 0.164 | 0.213 | 0.238 | 0.262 | 0.312 | 0.361 | 0.437 | 0.547 | 0.656 | 0.875 | 1 |
| dk min | 0.129 | 0.154 | 0.201 | 0.226 | 0.25 | 0.298 | 0.347 | 0.419 | 0.527 | 0.636 | 0.851 | 0.97 |
| k max | 0.039 | 0.046 | 0.059 | 0.066 | 0.073 | 0.087 | 0.101 | 0.132 | 0.166 | 0.199 | 0.265 | 0.331 |
| k min | 0.033 | 0.038 | 0.051 | 0.058 | 0.063 | 0.077 | 0.091 | 0.122 | 0.152 | 0.185 | 0.245 | 0.311 |
| No. | T5 | T6 | T8 | T10 | T10 | T15 | T25 | T27 | T40 | T45 | T55 | T60 |
| e | 0.058 | 0.069 | 0.094 | 0.111 | 0.111 | 0.132 | 0.178 | 0.2 | 0.266 | 0.312 | 0.446 | 0.529 |
| t min | 0.015 | 0.022 | 0.03 | 0.035 | 0.035 | 0.04 | 0.05 | 0.06 | 0.09 | 0.105 | 0.14 | 0.14 |
Mechanical Property:
ASTM F835 – Alloy Steel Torx Button Head Screws
ASTM F835 specifies material and mechanical property requirements for alloy steel button head screws. Relevant requirements include hardness and strength, depending on the applicable grade and specification.
ASTM F879 – Stainless Steel Torx Button Head Screws
ASTM F879 specifies material and mechanical property requirements for stainless steel button head screws. Applicable requirements depend on the stainless steel material and specified condition.