The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-255-2278, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-255-2278 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.620 INCHES NOMINAL IN |
| Fastener Length | 11.880 INCHES NOMINAL IN |
| Thread Length | 10.000 INCHES NOMINAL IN |
| First Diameter From Head | 0.760 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.945 INCHES NOMINAL IN |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.880 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.657 INCHES MINIMUM AND 0.662 INCHES MAXIMUM IN |
| Width Between Flats | 0.606 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.849 INCHES NOMINAL IN |
| Thread Class | 2G G |
| Thread Quantity Per Inch | 5 |
| Material | STEEL COMP 1018 OVERALL |
| Third Diameter From Head | 0.760 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 |
|---|---|
| 435987-001 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-255-2278 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-255-2278: Head Height: 0.620 INCHES NOMINAL IN; Fastener Length: 11.880 INCHES NOMINAL IN; Thread Length: 10.000 INCHES NOMINAL IN; First Diameter From Head: 0.760 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.