The Bolt,shoulder, cataloged under National Stock Number 5306-00-181-0807, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Brp Us Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-181-0807 |
| Primary Part Number | 311487 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Head Height | 0.139 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Fastener Length | 0.638 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN |
| Shoulder Length | 0.200 INCHES MINIMUM AND 0.204 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.368 INCHES MINIMUM AND 0.371 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.438 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.609 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1038 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 |
|---|---|
| 311487 PRIMARY | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 311487 | 5/9 Secondary reference Outboard Marine Corp Johnson Motors Div |
NSN 5306-00-181-0807 is a Bolt,shoulder, manufactured by Brp Us Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-181-0807 has 1 manufacturer part number on file: 311487 (Brp Us Inc).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-500-0291. Verify interchangeability with system specifications before substitution.
Key specifications for 311487: Head Height: 0.139 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Fastener Length: 0.638 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN; Shoulder Length: 0.200 INCHES MINIMUM AND 0.204 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.368 INCHES MINIMUM AND 0.371 INCHES MAXIMUM FIRST SHOULDER 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.