Detail & Specs
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M4 Metric Allen Socket Head Bolt, Black Stainless Steel
A2-70 Stainless / Full Head Height
Socket head bolts are great for limited space installation areas. An allen wrench is used to install these screws, allowing access into tight locations where a traditional external hex drive bolt would not fit.
Partially threaded socket cap bolts have an unthreaded length under the head that is stronger than the threaded portion of the bolt. The unthreaded / threaded length dimensions vary by diameter. Fully threaded socket cap screws are meant to engage the entire length with a tapped hole. The socket head may be smooth or knurled.
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.
Material: Stainless Steel
Suitable for damp locations
Corrosion resistant
Finish: Black Oxide
- 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 spray applied during the coating process wears off over time, revealing an attractive matte black finish
The black oxide coating per MIL-DTL-13924, Class 4 on 300 series corrosion resistant steel meets 96 hours of resistance in a 5% salt spray (fog) test in accordance with ASTM B117. We recommend using stainless steel installation tools to prevent extraneous rust.
Also known as allen cap screw, hex drive screw, socket head bolt, hexagon socket head cap screw. Cylindrical head screw meant to be used with an allen wrench.
Alternative Specification
ISO 4762
