scope:

This specification covers slotted, cross-recessed and hexagon head machine screws.

Machine screws shall be of the following types and styles (see 6.2).

Type I - Slotted (see fig. 1) Style 1s - Round head Style 6s - Oval head, 82° Style 2s - Flat head, 82° Style 7s - Truss head Style 3s - Flat head, 100° Style 8s - Binding head Style 4s - Fillister head Style 9s - Pan head Style 5s - Fillister head, Style 10s - Hexagon head drilled Type II - Hexagon, Plain (see fig. 1) Style 10p - Hexagon Type III - Cross-Recessed, Recess Designs I and II (see fig. 2). Style 1c - Round head Style 6c - Oval head, 82° Style 2c - Flat head, 82° Style 7c - Truss head Style 3c - Flat head, 100° Style 8c - Binding head Style 4c - Fillister head Style 9c - Pan head NOTE: Use of cross-recess design II is not recommended.

Machine screws shall be classified according to size by the nominal diameter of the body.

intended Use:

Machine screws are intended to be used in the assembling of parts in relation to each other, either permanently or temporarily.