🔩 Product Overview: Socket Head Cap Screws – A2 Stainless Steel (M6 to M24)
When you need a high‑strength fastener that fits into counterbored holes and handles serious torque, these socket head cap screws are the industry standard. Made from A2 (304) stainless steel, they offer excellent corrosion resistance, oxidation resistance, and heat resistance – plus high strength and superior toughness. The cylindrical head allows for a low‑profile installation, and the internal hex drive (Allen key) gives you positive engagement with no cam‑out, even under heavy load. Available in metric sizes from M6 all the way up to M24, with lengths to suit your application. Fully threaded or partial thread depending on size (standard DIN 912). Perfect for machinery, automotive, industrial equipment, and structural assemblies where reliability and corrosion resistance are critical.
✨ Why A2 Stainless Socket Head Cap Screws Are a Shop Essential
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A2 stainless steel (304 grade) – Excellent corrosion, oxidation, and heat resistance. High strength and superior toughness for demanding applications.
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Hex socket (Allen) drive – Internal hex provides full contact engagement, eliminates cam‑out, and allows high torque without stripping the recess.
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Socket cap head (cylindrical) – Low‑profile, clean appearance. Designed for counterbored holes, leaving a flush or recessed finish.
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Wide metric range: M6, M8, M10, M12, M14, M16, M18, M20, M22, M24 – From medium‑duty fastening up to heavy structural bolts. One product line covers many industrial needs.
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Fully or partially threaded (DIN 912 standard) – Smaller sizes are fully threaded; larger sizes often have a partial thread shank. Check the specific length and size.
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Length measured under the head – Consistent with standard socket cap screw measurement. Example: M10 x 40mm = 40mm thread length below head.
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Wide application range – Machinery, automotive, industrial equipment, structural steel, marine hardware, and general fabrication.
📏 Technical Specifications – Socket Head Cap Screws (A2 Stainless)
| Specification |
Details |
| Product Type |
Socket Head Cap Screws (Hex socket / Allen drive) |
| Material |
A2 Stainless Steel (304 / 18-8) |
| Drive Style |
Hex key (Allen) – internal hex socket |
| Head Style |
Cylindrical socket cap head (low‑profile) |
| System of Measurement |
Metric |
| Screw Sizes (Diameter) |
M6, M8, M10, M12, M14, M16, M18, M20, M22, M24 |
| Thread Pitches (coarse) |
M6x1.0, M8x1.25, M10x1.5, M12x1.75, M14x2.0, M16x2.0, M18x2.5, M20x2.5, M22x2.5, M24x3.0 |
| Thread Type |
Fully threaded (for shorter lengths) / Partial thread (for longer lengths) – per DIN 912 |
| Length Measurement |
Under head – from flat bearing surface to tip (head not included) |
| Finish |
Natural stainless (unplated) |
| Standard |
DIN 912 / ISO 4762 |
❓ FAQs – Socket Head Cap Screws
🔸 What is the advantage of a socket head cap screw over a hex head bolt?
Socket head cap screws have a lower profile, allowing them to be used in counterbored holes or tight spaces. The internal hex drive provides better torque transfer and reduces the risk of cam‑out. They also look cleaner on finished assemblies. For high‑torque applications, the socket head is often preferred.
🔸 Are these screws fully threaded or partially threaded?
Per DIN 912 standard, smaller diameters (M6–M10) in shorter lengths are typically fully threaded. For larger sizes (M12 and above) or longer lengths, there is usually an unthreaded shank under the head. If you need a specific thread length, check the product options or contact us.
🔸 Will A2 (304) stainless steel rust in outdoor or coastal environments?
A2 stainless is highly resistant to moisture, rain, and humidity – perfect for most outdoor use. For direct saltwater immersion or heavy coastal spray, A4 (316) stainless is better, but for general outdoor machinery, automotive, and structural applications, 304 lasts for years without rust.
🔸 What hex key (Allen wrench) size do I need for M6 through M24?
Standard hex key sizes for socket cap screws: M6 uses 5mm, M8 uses 6mm, M10 uses 8mm, M12 uses 10mm, M14–M16 uses 12mm, M18–M20 uses 14mm, M22–M24 uses 17mm. Always use a good quality metric hex key set to avoid stripping the socket.
🔸 Can I use these screws with nuts, or are they for tapped holes only?
These are standard machine screws – they work perfectly with matching metric nuts or in pre‑tapped holes. For best corrosion resistance, pair them with A2 stainless nuts. Use flat washers under the head or nut as needed to protect surfaces.
🔸 What lengths are available for each diameter?
Lengths vary by size – typical ranges: M6: 10–60mm, M8: 12–80mm, M10: 16–100mm, M12: 20–120mm, M14–M24: 25–200mm (depending on size). Please select your desired length from the dropdown options. If you need a length not listed, contact us.
