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GMW GMW3362
M Point for External Metric Thread, Coarse Pitch Fastenersstandard by General Motors Worldwide , 07/01/2024
Purpose.
This standard specifies the characteristics of M Points for external metric threaded fasteners with coarse pitch; M4, M5, M6, M8, M10, M12, M14, M16, M18, M20 and M22.
Designation.
Type A: Bolts, screws, studs, and double end studs with a standard end point.
Type B: Bolts, screws, and double end studs with an external hex driver end point.
Type C: Bolts, screws, and double end studs with an external six-lobe driver end point.
Type D: Bolts, screws, studs, and double end studs with a long radiused end point to assist locating.
Note: When not explicitly specified, the default shall be Type A.