The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-320-4499, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-320-4499 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Fastener Length | 0.107 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN |
| Thread Length | 0.072 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.080 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.029 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 48 |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.180 INCHES MINIMUM AND 0.186 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 |
|---|---|
| 14583 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-320-4499 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4920-01-391-4125, 5950-01-445-3535. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-320-4499: Head Height: 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Fastener Length: 0.107 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN; Thread Length: 0.072 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN; Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 15 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.