Socket Cap Screw Set
A2 stainless, 80 pieces, M4–M8
$42.00
USDStandard shipping $8.00, free over $75. Arrives in 3–5 business days. 30-day returns.
Eighty socket head cap screws in A2 stainless across four sizes, driven with a hex key rather than a screwdriver. The socket drive is the reason to choose these: it takes far more torque than a slot or a cross-head before it rounds out.
A2 is genuinely corrosion-resistant through the body rather than plated on the surface, so these survive outdoors, in damp, and in a bathroom. That is what you are paying the premium for.
One real caveat, stated plainly: stainless galls. Driven fast and dry into a stainless thread, the two surfaces cold-weld and the screw seizes solid halfway in. Drive them slowly, and use an anti-seize compound in a stainless-to-stainless joint.
The specification
Everything we know about this part, stated plainly — including what it is not rated for. The same record is printed on the card in the box.
- Material & finish
- A2 (AISI 304) austenitic stainless steel, self-coloured. Hexagon socket drive.
- Dimensions
- M4×16 (20 pcs) · M5×20 (20) · M6×25 (25) · M8×30 (15). 80 screws total. Drive sizes 3, 4, 5 and 6 mm hex.
- Weight
- 610 g
- Finish & tolerance
- Self-coloured stainless with a soft satin machined finish, not polished. Head height and socket depth are held to DIN 912; slight tool marks in the socket are normal.
- Made
- Machined and finished in the United States.
Care
- Drive slowly. Heat from a fast driver is what causes galling.
- Use anti-seize on any stainless-into-stainless thread, especially M8 and above.
- Seat the hex key fully before applying torque — a partly seated key is what rounds a socket.
Cautions
- Not rated for overhead lifting, rigging, towing, or any application where a failure drops a load on someone. Those need certified, individually traceable hardware and this is not that.
- Not structural. Do not use in load-bearing building work, vehicle suspension, brakes, or steering.
- No published proof load or torque spec is supplied with these, because they are a general-purpose assortment rather than a graded batch. If your application needs a number, buy graded fasteners with a certificate.
- Not as strong as high-tensile plated steel. A2 stainless is roughly grade 8.8 equivalent at best; do not substitute it where a 10.9 or 12.9 bolt is specified.
- Not for direct contact with aluminium in a wet environment without isolation — the galvanic pair corrodes the aluminium.
Shipping
$8.00 standard, free over $75. 3–5 business days. Full policy
30 DAYS
Returns
Unused and in original packaging. Refunded within 5 business days of reaching us. Full policy
Questions about this product
help@olympexsupply.comEvery message answered within one business day.
