NPFC - FF-S-85
SCREW, CAP, SLOTTED AND HEXAGON HEAD
| Organization: | NPFC |
| Publication Date: | 5 May 1969 |
| Status: | inactive |
| Page Count: | 26 |
scope:
This specification covers the types and styles of slotted and hexagon head cap screws, classified in 1.2.1 (see 6.1).
Cap screws shall be of the following types and styles (see 6.2).
Type I - Slotted head. Style 1s - Round head (see fig. 5). Style 2s - Flat countersunk head, 82° (see fig. 5). Style 4s - Fillister head (see fig. 5). Type II - Plain head. Style 10p - Hexagon head (see fig. 5).
Cap screws of steel material shall be of the following grades (see 6.2).
Grade 2 - Low carbon steel.
Grade 5 - Medium carbon steel.
Grade 8 - Alloy steel.
Grade 9 - Optional alloy steel.
The sizes of cap screws shall be classified by the nominal body diameter from ¼ inch thru 3 inches as specified (see 6.2).
intended Use:
Hexagon head and slotted head cap screws are designed primarily for use in precision machine tools and similar applications. They are commonly used in tapped holes, but may be used with nuts.
Document History
