The Nut,plain,round, cataloged under National Stock Number 5310-01-399-3076, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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 | 5310-01-399-3076 |
| Primary Part Number | 211066723 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Thread Series | UNF |
| Material Document and Classification | QQ-N-286, TY 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 1.998 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN |
| Nut Thickness | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY 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 |
|---|---|
| 211066723 PRIMARY | Naval Sea Systems Command (USA) |
| 6404324 PIECE 6 | Naval Sea Systems Command (USA) |
NSN 5310-01-399-3076 is a Nut,plain,round, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-399-3076 has 2 manufacturer part numbers on file: 211066723 (Naval Sea Systems Command), 6404324 PIECE 6 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-406-4538. Verify interchangeability with system specifications before substitution.
Key specifications for 211066723: Thread Series: UNF; Material Document and Classification: QQ-N-286, TY 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN. 10 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.