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Description / Abstract:
This Standard covers the general, dimensional, material, and
mechanical requirements for metric throughhardened (property
classes 8.8, 9.8, and 10.9) machine screws and case-hardened
tapping screws from 5 mm to 12 mm captivated washer assemblies
(SEMS). The covered washer types are helical, plain, conical, and
toothed.
This Standard describes two different methods of SEMS
manufacturing. It also covers standard and modified hardness
requirements for machine screw SEMS.
The inclusion of dimensional data in this Standard is not
intended to imply that all of the products described herein are
stock production items. Consumers should consult with respective
suppliers concerning the availability of products.
In addition, this Standard includes Nonmandatory Appendices that
contain information considered of significant importance to both
purchaser and manufacturer.