BSF, 5/8" x 2", Hex-Set Screw (R), 4 pack.
BSF, 5/8" x 2", Set Screw/ Bolt, Hexagon Head, High Tensile (R), 4 pack.
The term is used to describe a fully threaded hexagon bolt in the UK.
- High Tensile
- High Tensile – Zinc
- High Tensile – Galvanised
- A2 Stainless Steel
- A4 Stainless Steel
The term is also used to describe a threaded fastener that is typically used to hold a sleeve, collar or gear on a shaft to prevent relative motion. It is a threaded body that usually has no head. Unlike most other threaded fasteners it is basically a compression device normally used to generate axial thrust. Various drive types are provided to allow the set screw to be rotated. These types include hexagon socket, fluted socket, screwdriver slot and square head. Various point designs are available (the part of the set screw that rotates against the shaft being secured) and include:
British Standard Fine (BSF)
A thread form based upon the British Standard Whitworth form but with a finer thread; more threads per inch and has the same thread angle as the BSW and smaller thread depth.
BSF was developed by R E B Crompton and his assistant George Field and was first introduced in 1908, the thread form is specified in BS 84: 1956
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