The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-215-7308, 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 15 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 | 5310-01-215-7308 |
| Primary Part Number | SSN637-518-5356953 PIECE 8 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Washer Outside Diameter | 3.250 INCHES NOMINAL IN |
| Width Across Flats | 2.750 INCHES NOMINAL IN |
| Hole Thread Quantity Per Inch | 16 |
| Thread Series | UN |
| Hole Configuration Style | CONFIGURATION A |
| Washer Thickness | 0.625 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.125 INCHES IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Hole Nominal Thread Diameter | 0.375 INCHES IN |
| Thread Quantity Per Inch | 16 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Hole Type and Quantity | 1 TAPPED |
| 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 |
|---|---|
| SSN637-518-5356953 PIECE 8 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5310-01-215-7308 is a Nut,plain,extended Washer,hexago, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-215-7308 has 1 manufacturer part number on file: SSN637-518-5356953 PIECE 8 (Naval Sea Systems Command).
Key specifications for SSN637-518-5356953 PIECE 8: Overall Height: 1.500 INCHES NOMINAL IN; Washer Outside Diameter: 3.250 INCHES NOMINAL IN; Width Across Flats: 2.750 INCHES NOMINAL IN; Hole Thread Quantity Per Inch: 16. 15 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.