The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-331-6278, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-331-6278 |
| Primary Part Number | 6242855 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 0.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-81751 TY1 CL4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.188 INCHES NOMINAL IN |
| First Diameter From Head | 0.084 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.374 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Color | GRAY/GREY OVERALL |
| Surface Treatment | CERAMIC OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6242855 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5306-01-331-6278 is a Bolt,externally Relieved Body, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-331-6278 has 1 manufacturer part number on file: 6242855 (Naval Sea Systems Command).
Key specifications for 6242855: Fastener Length: 0.562 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-81751 TY1 CL4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.188 INCHES NOMINAL IN; First Diameter From Head: 0.084 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN. 9 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.