INTERN MPAPS-S-D-100.101-GS/PL PDF

GENERAL: This specification covers the mechanical and quality requirements for carbon steel tapping screws as used in automotive and related industries. It does not apply to corrosion resistant (stainless) steel screws.

The primary objective of the specification is to insure that screws form or cut mating threads in materials of construction into which they are normally driven, without deforming their own thread and without breaking during assembly or service.

Note: Certain limitations on basic material and manufacturing processes have been incorporated because the size and configuration of the parts under consideration make them vulnerable to relatively small variations in chemistry, heat treatment, etc.; and because experience has shown that in processing it is difficult to keep these variables consistently "in balance." Until improved performance tests are developed these limitations will supplement the "performance" features of the specifications.

RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification.