ASME B18.3 Low Cap Torx Screws
ASME B18.3 low cap Torx screws feature a reduced head height and a six-lobe Torx drive, providing a compact fastening solution for assemblies with limited clearance. The Torx drive helps improve tool engagement during installation, while the low-profile head is suitable for applications where space above the fastened surface is restricted.
Our production capabilities include precision cold heading, thread rolling and controlled heat treatment for alloy steel fasteners, along with manufacturing options for stainless steel screws. Material selection and production processes are controlled according to the specified dimensions, material requirements and mechanical properties to ensure consistent quality across different screw sizes.
Specification:
| Item | Specification |
|---|---|
| Standard | ASME B18.3 |
| Product Type | Low Cap Torx Screws |
| Thread Standard | ASME B1.1 |
| Thread Tolerance | 2A |
| Size Range | #0-5/16" |
| Material | Carbon Steel, Stainless Steel |
| Alloy Steel Standard | ASTM A574 |
| Stainless Steel Standard | ASTM F837 |
| Surface Treatment | Black Oxidation,Zinc Plated,Bright Finish |
| Inspection | Dimensions,Thread,Hardness,Coating |
Dimension Chart:
| Mon | #8 | #10 | 1/4 | 5/16 | 3/8 | 1/2 |
| P | 32|36 | 24|32 | 20|28|32 | 18|24|32 | 16|24|32 | 13|20|28 |
| dk max | 0.27 | 0.312 | 0.375 | 0.437 | 0.562 | 0.75 |
| dk min | 0.262 | 0.303 | 0.365 | 0.431 | 0.55 | 0.743 |
| k max | 0.085 | 0.098 | 0.127 | 0.158 | 0.192 | 0.254 |
| k min | 0.079 | 0.092 | 0.121 | 0.152 | 0.182 | 0.244 |
| No. | T15 | T20 | T27 | T30 | T40 | T50 |
| e | 0.132 | 0.155 | 0.2 | 0.221 | 0.266 | 0.352 |
| t min | 0.04 | 0.038 | 0.055 | 0.08 | 0.1 | 0.12 |
- RELATED SCREWS LISTS:
- Torx Socket Cap Screw
- ISO14579 Torx Socket Screw
- ISO14580 Torx Socket Screw
- ASME B18.3 Low Cap Torx Screws
- Countersunk Head Torx Screw
- ISO14581 Countersunk Torx Screw
- ASME B18.3 Countersunk Torx Screw
- Button Head Torx Screw
- ISO7380-3 Torx Button Screw
- ASME B18.3 Torx Button Screw
- ISO14583 Torx Pan Head Screw
- Cylindrical Head Torx Screw with Pin
- Cuntersunk Head Torx Screws with Pin
- Button Head Torx Screws with Pin
Mechanical Property:
Alloy Steel Low Cap Torx Screws — ASTM A574
Alloy steel low cap Torx screws are designed for compact fastening applications requiring high mechanical strength. ASTM A574 specifies mechanical requirements for quenched and tempered alloy steel socket head cap screws, including tensile strength, yield strength, proof load and hardness. Applicable requirements should be confirmed according to the specified product design and dimensions.
Stainless Steel Low Cap Torx Screws — ASTM F837
Stainless steel low cap Torx screws are suitable for applications requiring corrosion resistance and reliable fastening performance. ASTM F837 specifies the material and mechanical requirements for inch-series stainless steel socket head cap screws, including tensile strength, yield strength, elongation and hardness. The applicable requirements depend on the stainless steel alloy and condition.