Spline drive
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| Part of the series on | |
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| Screw drive types | |
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Slotted |
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Phillips ("Crosshead") |
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Pozidriv (SupaDriv) |
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Torx |
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Hex (Allen) |
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Robertson |
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Tri-Wing |
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Torq-Set |
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Spanner Head |
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Triple Square (XZN) |
| Others: | |
| polydrive, spline drive, double hex | |
Spline drive, is a fastener specification.
A spline drive bit or socket has 12 teeth. Spline drives are sized via numbers. #5 is one common size. It is different from the 12-toothed triple square and double hex drivers
The primary advantage spline drive and other special fasteners (such as torx) have over older standards, such as the common Phillips head (and its sibling Pozidriv), is that it resists cam-out, and is thus used in higher-torque applications. Incidentally, the spline drive is also often used in tamper-proof lug nuts on cars.
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