Detail & Specs
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M4 Metric Torx Socket Flat Head Cap Screw, Stainless Black Oxide
Flat head torx cap screws have a 90 degree angle underneath the head. When installed, the head of this screw is meant to sit flush with the surface of the work in a countersunk hole. Measured by overall length, including the head.
Torx drive screws provide higher torque transfer because the driving forces are transferred to each surface of the six lobes (wobble-free), instead of the four edges of the four edges on a phillips drive. Additional benefits include less wear on tools and no damage to the stainless steel surface coating.
Material: Stainless Steel
Suitable for damp locations
Corrosion resistant
Finish: Black Oxide
Attractive matte black finish
Abrasion resistant, does not peel, chip or rub off
Reduces friction, prevents galling
Does not change the strength of the stainless steel
Practically no dimensional change to base fastener
The black oxide coating per MIL-DTL-13924, Class 4 on 300 series corrosion resistant steel will show no signs of corrosion after 96 hours of exposure in a 5% salt spray (fog) test in accordance with ASTM B117.
Torx drive flat head screws are fully threaded, meant to engage with a tapped hole. These bolts can be used with many different styles of locking and non-locking nuts, tightly clamping together whatever the cap screw is being used to secure. Also known as a countersunk multi-tooth SL-drive machine screw, six lobe drive flat head countersunk socket cap bolt.
Alternative Specification
ISO 10642
