The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-388-8544, 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 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-388-8544 |
| Primary Part Number | 6404649 FIND 56 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | NICKEL ALLOY 400 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 6404649 FIND 56 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 512-6404651 FIND 52 | 5/9 Secondary reference Naval Sea Systems Command |
| DF6503-170 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| DF6503-172 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 512-6404649 FIND 56 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5310-01-388-8544 is a Nut,plain,hexagon, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-388-8544 has 1 manufacturer part number on file: 6404649 FIND 56 (Naval Sea Systems Command).
Key specifications for 6404649 FIND 56: Material Document and Classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Special Features: OVERALL DIA 5.000; NUT DISC BACK UP VALVE.; Material: NICKEL ALLOY 400 OVERALL; Bearing Surface Type: CHAMFERED. 3 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.