Grub Screw 1/4 x 5/16 BSF Black Gr.10.9 BS 2470

Grub Screw
Hexagon Head
Black Imperial BSF
High Tensile Grade 10.9
Dia: 1/4'
TPI: 26
Length: 5/16'
BS 2470
Allen Key Size: 1/8'
A BSF (British Standard Fine) grub screw, also known as a socket set screw, is a headless, fully threaded imperial fastener used to secure components—such as gears, pulleys, or collars—onto a shaft. It features the BSF fine thread pitch, which is closer together than the coarse BSW (British Standard Whitworth) thread.