The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-374-3275, 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 19 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-374-3275 |
| Primary Part Number | 5768588 ITEM 19 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Fastener Length | 2.060 INCHES NOMINAL IN |
| Thread Length | 0.685 INCHES NOMINAL IN |
| Hardness Rating | 85.0 ROCKWELL C MINIMUM OVERALL |
| Material Document and Classification | QQ-N-286 CLA FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.275 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 3 TYPE |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.375 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Minimum Tensile Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 90000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | NICKEL ALLOY K-500 OVERALL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 5768588 ITEM 19 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 60-01-7229 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| 211075976 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-374-3275 is a Bolt,externally Relieved Body, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-374-3275 has 1 manufacturer part number on file: 5768588 ITEM 19 (Naval Sea Systems Command).
Key specifications for 5768588 ITEM 19: Head Height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Fastener Length: 2.060 INCHES NOMINAL IN; Thread Length: 0.685 INCHES NOMINAL IN; Hardness Rating: 85.0 ROCKWELL C MINIMUM OVERALL. 19 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.