M4 Set Screws (Full Threaded Bolts)

M4 set screws are fully threaded hex head bolts great for fastening smaller components. Made from A2 stainless steel to DIN 933 specifications, 4mm set screws are a practical choice for equipment assembly, metalwork and everyday maintenance. Choose from a range of lengths to suit your project.

M4 Stainless Steel Set Screws from Fixabolt

The M4 size is useful for smaller brackets, fittings and assemblies. These 4mm set screws can be installed using a 7mm spanner or socket, and their A2 stainless steel composition provides good resistance to rust and corrosion without the need for additional protective coatings.

Common Uses for M4 Set Screws

M4 full thread bolts are commonly found in:
- Electrical cabinets, control panels and enclosures
- Small machinery and mechanical assemblies
- Metal brackets, clips and mounting plates
- Equipment repairs and replacement fixings
- Light fabrication and workshop projects

DIN 933 Specifications

M4 set screws have a nominal thread diameter of 4 mm and a standard coarse thread pitch of 0.7 mm.

DIN 933, now superseded by ISO 4017, covers fully threaded hexagon head screws. Unlike part-threaded hex bolts, the thread extends along the shank to the underside of the head, allowing the fastener to clamp thinner components without relying on an unthreaded section. 

For a complete fixing, pair your M4 set screws with compatible M4 stainless steel nuts and washers.

Trade Supply from Fixabolt

Order M4 set screws from Fixabolt quantities from 1 to 10,000, with UK delivery available. For A4 stainless steel options or help sourcing a particular length, contact our team through live chat.

FAQs

What spanner size do M4 set screws require?

DIN 933 M4 set screws have a 7 mm hex head, suitable for a matching spanner or socket.

Are M4 set screws suitable for outdoor use?

A2 stainless steel performs well in many outdoor environments. For coastal or more corrosive conditions, ask a human advisor about A4 (316) alternatives through our live chat.