The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-477-8367, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 11 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 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 | 5310-00-477-8367 |
| Primary Part Number | 1N1B4 |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Width Across Flats | 0.4275 INCHES MINIMUM AND 0.4395 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Material Document and Classification | QQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.281 INCHES NOMINAL IN |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | COPPER ALLOY 360 OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| 1N1B4 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
NSN 5310-00-477-8367 is a Nut,plain,castellated,hexagon, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-477-8367 has 1 manufacturer part number on file: 1N1B4 (The Boeing Company Div Legacy Am&m).
1 possible match (shared part number, not a government interchangeability claim): 5355-00-878-4323. Verify interchangeability with system specifications before substitution.
Key specifications for 1N1B4: Width Across Flats: 0.4275 INCHES MINIMUM AND 0.4395 INCHES MAXIMUM IN; Thread Series: UNF; Material Document and Classification: QQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 11 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.