Star screwdriver is also known as Torx key. Torx keys with an internal socket-head screw design. The cross-section resembles a star. Commonly used in automobiles, automated equipment, and computer components as it is resistant to wrench cam-out and so suitable for use in the types of powered tools used in production-line assembly. Ever Hardware provides custom-made fasteners and customizable packaging.

Heat treating makes the star screwdriver hardened or high tensile. Heat treating is a group of industrial and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are also used in the manufacture of many other materials, such as glass. Heat treatment involves the use of heating or chilling, normally to extreme temperatures, to achieve the desired result such as hardening or softening of a material.

Properties of various Star screwdriver
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 1.1 0.10–0.13 0.14–0.18
T4 0.05 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
T6 0.066 1.7 0.55–0.66 0.75–0.90
T7 0.078 1.99 1.0–1.3 1.4–1.7
T8 0.09 2.31 1.6–1.9 2.2–2.6
T9 0.098 2.5 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
T40 0.26 6.65 39.9–48.0 54.1–65.1 E8
T45 0.306 7.82 63.4–76.1 86–103.2
T47 GM-Style
T50 0.346 8.83 97.4–117 132–158 E10
T55 0.44 11.22 161–189 218–256 E12
T60 0.519 13.25 280–328 379–445 E16
T70 0.61 15.51 465–516 630–700 E18
T80 0.69 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

Ever Hardware makes the world a better place

Category Star Screwdriver
Finish Electro-Plating
Thread type Metric/Imperial/According to Request
Material Stainless Steel/Carbon Steel/Aluminum/Brass/Copper, etc.
Brand Ever Hardware
Place of origin China Mainland
Size option M1.0 to M18/#0 to 1/2″
Star screwdriver security L shaped torx screwdriver torx plus wrench

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What Client’s Say

Those look great! All the specs look perfect.
Kent De Mond
Perfect ! This is that I need.
Hernán Balboa
Thank you very much.
The bolts are perfect and they’re fits good.
Ashley
The nut fits perfect on our M2.5 screw part.
Height is also ok.
Mirjam
I tested the bolts this morning and they are perfect. Thank you so much.
Bill McDonald

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