ISO 8733
ISO 8733 - Parallel pins with internal thread, of unhardened steel and austenitic stainless steel
Unhardened parallel pins with internal thread, without the types of the hardened ISO 8735. A screw or a puller in the tapped hole of one end pulls the pin out. The pin is a cylinder toleranced m6 with a surface finish of Ra 0,8 micrometres, a 15 degree lead-in chamfer at the plain end and a chamfer at the threaded end. The tapped hole has a 6H metric coarse thread with a counterbore and a 120 degree countersink at its mouth, and a slight flat or small groove for air escape is allowed at the manufacturer's discretion. The standard has no types: steel St, 125 HV30 to 245 HV30, and austenitic stainless steel A1 to ISO 3506-1, 210 HV30 to 280 HV30, share one dimension table. Covers nominal diameters from 6 to 50 mm with threads M4 to M24 and lengths from 16 to 200 mm.