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BSF 5/16", Socket Screw, Cap Head, High Tensile/ 12.9, DIN 912.

BSF, 5/16", Allen/ Hexagon Socket, Cap Head, Screw/ Bolt, High Tensile (12.9), BS 2470. Socket Capscrews | Inch ANSI/BS 1936 | Here at Fixaball, we stock all available lengths of BSF, 5/16", Allen/...
£2.90 £4.35

BSF, 5/16", Allen/ Hexagon Socket, Cap Head, Screw/ Bolt, High Tensile (12.9), BS 2470. Socket Capscrews | Inch ANSI/BS 1936 |

Here at Fixaball, we stock all available lengths of BSF, 5/16", Allen/ Hexagon Socket, Cap Head, Screw/ Bolt, High Tensile (12.9), BS 2470 at the best internet prices and free delivery

Orders placed before 2pm are dispatched same day (Mon-Fri). Postal upgrades available at checkout.

5/16" BSF Socket Cap Screw/ Bolt Lengths Available

5/16 x 3/8
5/16 x 1/2
5/16 x 5/8
5/16 x 3/4
5/16 x 7/8
5/16 x 1”
5/16 x 1 1/4
5/16 x 1 1/2
5/16 x 1 3/4
5/16 x 2”
5/16 x 2 1/4
5/16 x 2 1/2
5/16 x 2 3/4
5/16 x 3”
5/16 x 3 1/4
5/16 x 3 1/2
5/16 x 3 3/4
5/16 x 4”

Allen/ Hexagonal Socket, Cap Head, Screw/ Bolt

Allen/ Hexagonal, Socket Cap Screw/ Bolts come as 'sets' and 'bolts'. The, ‘SET’, term is used to describe a fastener that is fully threaded in lengths up to and around 1 inch (from the underside of the head), depending on the diameter. As the diameter increases the set length will increase. Over around 1 inch (depending on the diameter) in length the fastener will have a, 'shoulder,' or unthreaded area (plain shank) under the head. This space of unthreaded area confirms that the fastener is now a bolt (cap head, bolt in this case). Some people might simply call them Allen or, 'Allan bolts,' in association with the Allen, Hexagonal Key which is used to tighten and loosen the fastener. So, ‘Socket,’ refers to the hexagon shaped indentation found on the top of the fasteners’ head. 

Available Materials: High Tensile (12.9 Grade) - Black/ Self-Colour

Material/ Finish

Appearance

Level of Corrosion Resistance

Typical Application

High Tensile Steel (12.9)

Black

Use oil/ grease on the fastener for corrosion resistance

Low moisture environments

 

British Standard Fine (BSF)

British Standard Fine (BSF) is a screw thread form, as a fine-pitch alternative to British Standard Whitworth (BSW) thread. It was used for steel bolts and nuts on much British machinery, including cars, prior to adoption of Unified, and later Metric, standards. For highly stressed conditions, especially in motorcycles, a finer thread, British Standard Cycle (BSC), was used as well.

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.

     


       

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