Kacang keling baja tahan karat (countersunk/kepala datar);Countersunk sirah / sirah flat narik kuku;Hexagon nut / bolt) - apa nomer standar nasional?

Countersunk sirah hexagon soket: GB70.3 DIN7991

Bukak pucuk sirah narik pucuk: GB12618

Kacang hexagon: GB6170 DIN934

Hexagon njaba bolt thread lengkap: GB5783 DIN933

Kacang keling: GB17880.1