BSF, 7/16", Cap Head, Socket Screw (12.9).

BSF, 7/16", Cap Head, Bolt/ Socket Screw/ Allen Bolt/, High Tensile (12.9), BS 2470. Fixaball.co.uk sells all lengths of BSF, 7/16" cap screws at the best internet prices with free, first class delivery....
£2.79

BSF, 7/16", Cap Head, Bolt/ Socket Screw/ Allen Bolt/, High Tensile (12.9), BS 2470.

Fixaball.co.uk sells all lengths of BSF, 7/16" cap screws at the best internet prices with free, first class delivery.

Orders placed before 2pm are usually dispatched same day (Mon-Fri).

The term, 'socket screw', is used to describe a fastener which has a hexagonal indentation in the head. This feature is for an Allen Key (Hexagonal Profiled Key) which you use to tighten and loosen the fastener. An allan bolt is also used to describe this type of fastener when the fastener has a part plain shank or 'shoulder'. This is recognisable by finding an area below the head which is unthreaded. If, the plain shoulder is critical, please call and we will measure it for you, per length.

Thread Type

British Standard Fine (BSF)

BSF was developed by R. E. B. Crompton, and his assistant George Field. BSF threads use the 55 degree Whitworth thread form. It was introduced by the British Engineering Standards Association in 1908.

British Standard Fine (BSF) is an imperial screw thread form and has a finer-pitch to it's alternative to British Standard Whitworth (BSW) thread. They are most commonly used to fasten components found in British machinery, including cars. The British Standard threads were used before Unified, the American version of imperial threads.

Today, fasteners with a BSF thread are particularly hard to find as they are no longer mass produced.  

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