BSF Thread Socket Capscrews Self Colour

British Standard Fine Also Known As BSF Thread 

Socket Capscrews To ASNI 1936 Series BS2470 Grade: 36 - 44HRc Self Colour Finish

Range From 1/4" - 5/8"

Thread Per Inch Index Below

1/4" - 26 TPI, 5/16" - 22 TPI, 3/8 - 20 TPI, 7/16 - 18 TPI, 1/2 - 16 TPI, 5/8" - 14 TPI