The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-045-5543, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-045-5543 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.068 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN |
| Fastener Length | 0.198 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN |
| Thread Length | 0.038 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN |
| First Diameter From Head | 0.078 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.099 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.150 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | OXIDE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 48 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.166 INCHES MINIMUM AND 0.183 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 |
|---|---|
| 209210-3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 209210-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-045-5543 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 8470-01-681-0545. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-045-5543: Head Height: 0.068 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN; Fastener Length: 0.198 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN; Thread Length: 0.038 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN; First Diameter From Head: 0.078 INCHES NOMINAL IN. 16 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.