Hobson Metric Socket Head Cap Screw, M22 / 80mm

The Hobson metric socket head cap screw has a metric thread and is alloy steel (per the Hobson guide for this class), plain finish, grade 12.9. There are 58 items: M22 to M36, in lengths from 40mm to 300mm. Head style: SHCS, Socket Head Cap Screw.

The head carries a socket, so the screw is driven with a key or bit instead of a spanner. This item is G12.9.

Where this product is used

• Jigs, fixtures and die sets that are assembled and re-set with a hex key
• Clamping plates, covers and housings down onto tapped holes
• Motor, pump and gearbox mounting where the head is recessed below the surface
• Assemblies that will be painted, oiled or enclosed after fitting
• Tooling and machine building where a high-strength alloy fastener is wanted
• The 58 items cover diameters from M22 to M36 and lengths from 40mm to 300mm, confirm the size against your drawing before ordering

Features

• 58 items: M22 to M36
• Metric thread, socket head cap screw
• Alloy steel, quenched and tempered for this class
• Plain finish
• Plain finish: suited to dry indoor, oiled, painted or enclosed use
• Class 12.9 alloy steel for heavy-duty, high-load work

Key specifications

Choosing the right option

Choose the thread form first: the screw must match its nut or tapped hole in thread form, diameter and pitch.

These socket head cap screws are plain steel, with no coating beyond a light oil film, so they rust quickly in moisture. That makes it a good fit for dry indoor work, machinery, and assemblies that are painted, oiled or enclosed after fitting. For anything outdoors or damp, choose a hot dip galvanised or 316 stainless option instead. Plain alloy steel socket screws are the normal choice for tooling and machine building, where the parts are usually oiled or enclosed.

Property class 12.9 is an alloy steel class for heavy-duty, high-load fixing. For load-critical, structural or lifting joints, confirm the fastener against the engineer's specification. Fasteners are not lifting rated unless marked.

Related socket screws: Hobson Metric Socket Head Cap Screw, Grade 12.9 Alloy Steel, Plain, M2 to M22, Hobson Metric Socket Head Cap Screw, Grade 12.9 Alloy Steel, Zinc, M3 to M24 and Hobson Metric Fine Socket Head Cap Screw, Class 12.9, Zinc Plated, M10 and M12.