Hex socket button head cap screws with collar partially / fully threaded — M 4 x 8

Bossard · Screws and Bolts with Internal Drive. d1: M4 | d2 max.: 9,4 | d3 max.: 7,2 | k max.: 2,2 | c max.: 0,8 | t min.: 1,3 | s: 2,5 | b: - | L: 8