FORD WM921

Description / Abstract: FORD WM921, 2009 Edition, December 8, 2009 - DIMENSIONAL REQUIREMENTS FOR METRIC PORT

This specification describes the dimensional requirements for metric ports to be used with stud or plug ends per WM200, ISO 6149-2, ISO 6149-3, and ISO 6149-4.

The port dimensions in this standard conform to ISO 6149-1 and SAE J2244/1 except:

Angle tolerance for use with plug which seats on the angled surface

Drill depth increased to accommodate modified bottom tap in place of bottom tap

Identification groove is not permitted

Addition of M30 size per SAE J2244/1