Torx cylindrical head screws are a common screw fastener on the market. It also called Hexalobular Socket Cheese Head Screw.They use a plum-shaped groove to allow the screwdriver to better embed into the thread groove, making it easier to tighten or loosen. The materials generally include stainless steel, carbon steel, and alloy steel. The strength grades of carbon steel include 4.8, 5.8, etc. and the strength grades of stainless steel include A2-50, A2-70, A3-50, A3-70, etc. The specifications of ISO14580 Torx socket head screw mainly include M2-M10, similar to the standard GB /T 2671.1, DIN EN ISO 14580. Mainly used in electronic products such as cars, motorcycles, bicycles, hard drives, computer systems, etc,with anti-theft function.
The Specification Form of ISO14580 is as bellow
| ISO14580 | M | ||||||||||
| d | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 8 | 10 | ||
| P | Pitch | 0.4 | 0.45 | 0.5 | 0.6 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | |
| a | max | 0.8 | 0.9 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | |
| dk | max=nominal size | 3.8 | 4.5 | 5.5 | 6 | 7 | 8.5 | 10 | 13 | 16 | |
| min | 3.62 | 4.32 | 5.32 | 5.82 | 6.78 | 8.28 | 9.78 | 12.73 | 15.73 | ||
| da | max | 2.6 | 3.1 | 3.6 | 4.1 | 4.7 | 5.7 | 6.8 | 9.2 | 11.2 | |
| k | max=nominal size | 1.55 | 1.85 | 2.4 | 2.6 | 3.1 | 3.65 | 4.4 | 5.8 | 6.9 | |
| min | 1.41 | 1.71 | 2.26 | 2.46 | 2.92 | 3.47 | 4.1 | 5.5 | 6.54 | ||
| r | min | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.4 | 0.4 | |
| w | min | 0.5 | 0.7 | 0.75 | 1 | 1.1 | 1.3 | 1.6 | 2 | 2.4 | |
| x | max | 1 | 1.1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3.2 | 3.8 | |
| Socket No. | 6 | 8 | 10 | 15 | 20 | 25 | 30 | 45 | 50 | ||
| A | Ref. | 1.75 | 2.4 | 2.8 | 3.35 | 3.95 | 4.5 | 5.6 | 7.95 | 8.95 | |
| t | max | 0.84 | 0.91 | 1.27 | 1.33 | 1.66 | 1.91 | 2.29 | 3.05 | 3.43 | |
| min | 0.71 | 0.78 | 1.01 | 1.07 | 1.27 | 1.52 | 1.9 | 2.66 | 3.04 | ||
Product standard of this physical picture: ISO14580
Spec:M4-0.7*10 Strength Class： Material:SUS304 Surface treatment :Plain
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