The Screw,machine, cataloged under National Stock Number 5305-01-475-8178, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-475-8178 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.016 INCHES NOMINAL IN |
| Fastener Length | 0.951 INCHES NOMINAL IN |
| Thread Length | 0.389 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 316 |
| Internal Drive Style | CROSS RECESS TYPE II |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Head Diameter | 0.371 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS24694-58 | 3/2 Design control — primary reference U.S. Government activity |
| NASM24694 | 5/1 Secondary reference U.S. Government activity |
NSN 5305-01-475-8178 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-520-5056, 5305-01-520-5063. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-475-8178: Head Height: 0.016 INCHES NOMINAL IN; Fastener Length: 0.951 INCHES NOMINAL IN; Thread Length: 0.389 INCHES NOMINAL IN; Nominal Thread Diameter: 0.190 INCHES IN. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.