External Torx Size Chart

Torx is a relatively new type of bolt that was designed in 1967. It has a unique head pattern that has 6 points which makes it unique and also very capable. There are many different types of torx bolts but they can be categorized in internal and external. With internal bolts, the head has the pattern implemented into the inside of the bolt, making it internal type. As such, you will need specific or internal screwdrivers and sockets. A second and a newer type of torx is external torx. It has the entire head shaped in the well-known torx pattern, hence the name. These bots are more common in large sizes and they are commonly used in the car industry. The sizes of the internal and external torx bolts do not match in anyway and you will obviously need different tools to get the job done. Anyway, we will take a look at both types and explain each one.

Various torx drives chart. You can see the type, point to point distance and also torque range (minimum and highest).

Size/NamePoint to point in inchesPoint to point in mmMaximum torque lb-ftMaximum torque N mE torx
T10.0310.810.01–0.020.02–0.03
T20.0360.930.05-0.070.07-0.09
T30.0461.100.10–0.130.14–0.18
T40.0501.280.16–0.210.22–0.28
T50.0551.420.32–0.380.43–0.51E2
T5.5
T60.0661.700.55–0.660.75–0.90
T70.0781.991.0–1.31.4–1.7
T80.0902.311.6–1.92.2–2.6
T90.0982.502.1–2.52.8–3.4
T100.1072.742.7–3.33.7–4.5
T150.1283.274.7–5.76.4–7.7
T200.1513.867.74–9.3710.5–12.7E4
T250.1734.4311.7–14.015.9–19E5
T270.1954.9916.6–19.822.5–26.9
T300.2165.5222.9–27.631.1–37.4E6
T350.2325.90E7
T400.2326.6539.9–48.054.1–65.1E8
T450.2327.8263.4–76.186–103.2
T47GM-Style
T500.3468.8397.4–117132–158E10
T550.44011.22161–189218–256E12
T600.51913.25280–328379–445E16
T700.61015.51465–516630–700E18
T800.69017.54696–773943–1048E20
T900.78419.92984–10941334–1483
T1000.87122.131359–15111843–2048E24

The second chart here is an external torx size table focused on this specific type. The same point to point measurements are used while there is no torque info.

Size/NamePoint to point distance in inchesPoint to point distance in mmSAE fastener selectionMetric fastener selection
E40.153.8#6M3
E50.184.7#8M4
E60.225.6#10M5
E70.246.1
E80.297.41/4"M6 & M7
E100.369.35/16"M8
E120.4311.13/8"M10 & M11
E140.512.87/16"M12
E160.5714.71/2"
E180.6516.69/16"M14
E200.7218.45/8"M16
E240.8722.13/4"M18 & M20
E287/8"M22
E321"M24 & M27
E361-1/8"M30
E401-1/4"M33
E441-3/8"M36