The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-453-4374, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-453-4374 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Head Height | 0.195 INCHES NOMINAL IN |
| Fastener Length | 1.078 INCHES NOMINAL IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| First Diameter From Head | 0.187 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.516 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.625 INCHES NOMINAL IN |
| Head Style | BEVEL-CONICAL |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.250 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.375 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | PAINT OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Third Diameter From Head | 0.109 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.438 INCHES NOMINAL 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 |
|---|---|
| 700-2-14154 | 3/9 Design control — primary reference British Aerospace Land & Sea Systems, Post Design Services |
| 700-2-14154 | C/1 Advisory reference — outside the item-of-supply concept Leonardo Uk Ltd |
NSN 5305-00-453-4374 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-453-4374: Width Across Flats: 0.156 INCHES NOMINAL IN; Head Height: 0.195 INCHES NOMINAL IN; Fastener Length: 1.078 INCHES NOMINAL IN; Thread Length: 0.469 INCHES NOMINAL IN. 21 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.