The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-407-9254, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-407-9254 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.016 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 1.342 INCHES MINIMUM AND 1.346 INCHES MAXIMUM IN |
| Head Height | 0.565 INCHES NOMINAL IN |
| Fastener Length | 1.904 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment Document and Classification | TT-C-595 FED SPEC 1ST TREATMENT RESPONSE AND TT-E-529 FED SPEC 2ND TREATMENT RESPONSE GRIP |
| Surface Treatment Document and Classification | TT-C-595 FED SPEC 1ST TREATMENT RESPONSE AND TT-E-529 FED SPEC 2ND TREATMENT RESPONSE HEAD |
| Thread Length | 0.438 INCHES MINIMUM IN |
| First Diameter From Head | 0.875 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.122 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.839 INCHES MINIMUM AND 0.849 INCHES MAXIMUM IN |
| Width Between Flats | 0.938 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.062 INCHES NOMINAL IN |
| Fifth Diameter From Head | 0.499 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 5 |
| Surface Treatment | PASSIVATE OVERALL |
| Surface Treatment | PAINT AND ENAMEL GRIP |
| Surface Treatment | PAINT AND ENAMEL HEAD |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 303SE OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.372 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.938 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| SCB93177 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-407-9254 is a Bolt,externally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-407-9254: Fourth Diameter From Head: 0.016 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 1.342 INCHES MINIMUM AND 1.346 INCHES MAXIMUM IN; Head Height: 0.565 INCHES NOMINAL IN; Fastener Length: 1.904 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN. 28 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.