BS970 316S11,BS970 304S11,BS970 431S29,BS970 321S31

BS970 is a Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels, several grades are covered including

  • BS970 316S11 – Austenitic stainless steel with good resistance to chloride corrosion.
  • BS970 304S11 – Austenitic stainless steel which is probably the most widely used. When annealed it is non magnetic. When cold worked it becomes slightly magnetic.
  • BS970 431S29 – Martensitic with good impact strength and corrosion resistance which is quench-hardenable.
  • BS970 321S31 – Austenitic stainless steel with added titanium.

West Special Fasteners are manufacturers of BS970 Fasteners.

BS970 Fasteners such as Nuts, Bolts, Washers, Socket Capscrews, Studs, Studbolts, Socket Setscrews, Socket Countersunk screws & bespoke machined components or Hot Forged items can all be produced at West Special Fasteners Limited.

Material selection will depend upon design, service condition, mechanical properties and high temperature characteristics.

West Special Fasteners specialises in BS970 bolting and have supplied major UK companies with bolts, nuts etc.

We look forward to helping with your bolting requirements and would welcome any enquiries by telephone on + 44 (0)1246 291111 or email