Tri-Wing
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Slotted (flat or straight) |
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Phillips ("crosshead") PH |
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Pozidriv (SupaDriv) PZ |
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Square |
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Robertson (square) |
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Hex |
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Hex socket (Allen) |
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Torx T, TS, TX |
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Tri-Wing |
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Torq-set |
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Spanner head (Snake-eye) |
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Triple square XZN |
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Polydrive |
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One-way - Clutch |
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Spline drive |
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Double hex |
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Bristol |
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The Tri-Wing is a type of screw and screw head. It is sometimes called a triangular slotted screw. It is used as a tamper-resistant screw on various products, typically electronics. The Tri-Wing is a tamper-resistant screw due to the rarity of Tri-Wing screwdrivers in hardware stores, although they can be legally bought online.
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[edit] Appearance
Tri-Wing, as the name suggests, is a screw with three "wings" and a small triangular hole in the center. A variation is a kind in which the three "wings" are joined in the center (with no triangular hole). A somewhat similar-looking design in which three short radial slots are not joined in the center is called a Tri-groove screw head.
[edit] Examples of applications
[edit] Discouraging home repair or modifications
- Black & Decker uses Tri-Wing screws on irons.
- Kyocera uses Tri-Wing screws on their phones.
- Nintendo uses Tri-Wing screws in its Game Boy, DS, DS Lite, GameCube, and Wii products.
- Sanyo uses them in its cell phones.
- Nokia formerly used them in some older phones and chargers.
- Fujifilm used them in some of their digital cameras.
- Sony uses them some of their PDAs and laptop computers.
- Apple Inc. uses them on their older wireless keyboards and for securing the battery to the case in their entire MacBook Pro line of laptops, beginning June 2009.
- Telecom New Zealand uses them on household external junction boxes.
- Microdrives (Type II CompactFlash Cards) often use them.
- Panasonic uses them in some of its cell phones.
- Microsoft uses them on the backside of the Zune HD.
- Hori uses them on the Tekken 6 Wireless joystick.
[edit] Discouraging vandalism or theft
- They have been used on light fixtures in common areas of apartment buildings, schools, subways, etc., to prevent the theft of lightbulbs, fluorescent tubes, CFLs, etc.
