Socket Head Cap Screws
12.9 socket caps to DIN 912 / ISO 4762, machined for special lengths and materials.
Socket caps in special lengths, materials or with modified heads - the standard catalogue sizes you can buy anywhere, the odd ones we machine.
How we make it: Swiss CNC machining service →
3–5 weeks
500 pieces
ISO 9001:2015 · IATF 16949
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Thread range | M2–M36 | metric |
| Property class | 12.9 / A2-70 / A4-80 | - |
| Head diameter | ±0.13 | mm |
| Hex socket | To DIN 912 / ISO 4762 | standard |
| Non-standard lengths | Machined from bar | - |
| Material certs | EN 10204 3.1 | on request |
Available Materials
- Alloy steel 12.9
- Stainless A2 / A4
- Stainless 17-4 PH
- Titanium 6Al-4V
- Monel 400
Typical Applications
- Machine assembly
- Tooling and dies
- Hydraulic manifolds
- Marine fittings
- Instrument assembly
Surface Finishes
- Black oxide (standard 12.9)
- Zinc-nickel plating
- Passivate
- PTFE coating
- Xylan
Industries Served
- Industrial Equipment
- Energy & Oil & Gas
- Marine
- Aerospace
- Automation
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Part size
- Thread range at M2–M36 metric decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Material
- The first material listed, Stainless Steel 17-4 PH (630), rates 4/10 on our machinability scale at 32 HRC (annealed) · 44 HRC (H900). On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 500 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Thread gauges over the full thread range on the drawing
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- When is it worth machining a screw instead of buying one?
- When the length is odd, the material is exotic or the head needs a modification. Below that, buying a standard part and cutting it is cheaper and stronger.
Related part families
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Custom Bolts & Screws
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