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Screw drive types |
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Slotted |
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Cruciform |
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Internal polygon |
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Hexalobular |
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Three-pointed |
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Special |
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Size | Point-to-point distance | Maximum torque range | ~ E Torx | ||
---|---|---|---|---|---|
(in) | (mm) | (lb·ft) | (N·m) | ||
T1 | 0.031 | 0.81 | 0.01–0.02 | 0.02–0.03 | |
T2 | 0.036 | 0.93 | 0.05–0.07 | 0.07–0.09 | |
T3 | 0.046 | 1.10 | 0.10–0.13 | 0.14–0.18 | |
T4 | 0.050 | 1.28 | 0.16–0.21 | 0.22–0.28 | |
T5 | 0.055 | 1.42 | 0.32–0.38 | 0.43–0.51 | E2 |
T5.5[8] | |||||
T6 | 0.066 | 1.70 | 0.55–0.66 | 0.75–0.90 | |
T7 | 0.078 | 1.99 | 1.0–1.3 | 1.4–1.7 | |
T8 | 0.090 | 2.31 | 1.6–1.9 | 2.2–2.6 | |
T9 | 0.098 | 2.50 | 2.1–2.5 | 2.8–3.4 | |
T10 | 0.107 | 2.74 | 2.7–3.3 | 3.7–4.5 | |
T15 | 0.128 | 3.27 | 4.7–5.7 | 6.4–7.7 | |
T20 | 0.151 | 3.86 | 7.74–9.37 | 10.5–12.7 | E4 |
T25 | 0.173 | 4.43 | 11.7–14.0 | 15.9–19 | E5 |
T27 | 0.195 | 4.99 | 16.6–19.8 | 22.5–26.9 | |
T30 | 0.216 | 5.52 | 22.9–27.6 | 31.1–37.4 | E6 |
T35[9] | 0.232 | 5.90 | E7 | ||
T40 | 0.260 | 6.65 | 39.9–48.0 | 54.1–65.1 | E8 |
T45 | 0.306 | 7.82 | 63.4–76.1 | 86–103.2 | |
T47[10][11] | GM-Style | ||||
T50 | 0.346 | 8.83 | 97.4–117 | 132–158 | E10 |
T55 | 0.440 | 11.22 | 161–189 | 218–256 | E12 |
T60 | 0.519 | 13.25 | 280–328 | 379–445 | E16 |
T70 | 0.610 | 15.51 | 465–516 | 630–700 | E18 |
T80 | 0.690 | 17.54 | 696–773 | 943–1048 | E20 |
T90 | 0.784 | 19.92 | 984–1094 | 1334–1483 | |
T100 | 0.871 | 22.13 | 1359–1511 | 1843–2048 | E24 |
Size | Point-to-point distance [6] | Standard fastener selection [7] | ||
---|---|---|---|---|
(in) | (mm) | SAE | Metric | |
E4 | 0.15 | 3.8 | #6 | M3 |
E5 | 0.18 | 4.7 | #8 | M4 |
E6 | 0.22 | 5.6 | #10 | M5 |
E7 | 0.24 | 6.1 | ||
E8 | 0.29 | 7.4 | 1/4' | M6 & M7 |
E10 | 0.36 | 9.3 | 5/16' | M8 |
E12 | 0.43 | 11.1 | 3/8' | M10 & M11 |
E14 | 0.50 | 12.8 | 7/16' | M12 |
E16 | 0.57 | 14.7 | 1/2' | |
E18 | 0.65 | 16.6 | 9/16' | M14 |
E20 | 0.72 | 18.4 | 5/8' | M16 |
E24 | 0.87 | 22.1 | 3/4' | M18 & M20 |
E28 | 7/8' | M22 | ||
E32 | 1' | M24 & M27 | ||
E36 | 1-1/8' | M30 | ||
E40 | 1-1/4' | M33 | ||
E44 | 1-3/8' | M36 |