The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-280-6687, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-280-6687 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.095 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 0.518 INCHES MINIMUM AND 0.522 INCHES MAXIMUM IN |
| Width Across Flats | 0.141 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Head Height | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Sixth Diameter From Head | 0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN |
| Fastener Length | 0.688 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.130 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.261 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.293 INCHES MINIMUM AND 0.302 INCHES MAXIMUM IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.095 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Sixth Diameter | 0.558 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.243 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN |
| Fifth Diameter From Head | 0.158 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 5 |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | IRON ALLOY 660 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.458 INCHES MINIMUM AND 0.462 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 3680498 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-280-6687 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-280-6687: Fourth Diameter From Head: 0.095 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 0.518 INCHES MINIMUM AND 0.522 INCHES MAXIMUM IN; Width Across Flats: 0.141 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Head Height: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN. 29 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.