The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-386-7658, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-386-7658 |
| Primary Part Number | DF6503-172 FN 51SS |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Material | NICKEL ALLOY OVERALL |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| DF6503-172 FN 51SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 512-6404651 FN 51SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6404651 FN 51SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6404649 FN 54SS | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 6404649 FN 54 | 5/1 Secondary reference Naval Sea Systems Command |
| DF6503-172 FN 51 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 512-6404649 FN 54 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5310-01-386-7658 is a Nut,plain,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-386-7658 has 4 manufacturer part numbers on file: DF6503-172 FN 51SS (Naval Inventory Control Point Mechanicsburg), 512-6404651 FN 51SS (Naval Inventory Control Point Mechanicsburg), 6404651 FN 51SS (Naval Inventory Control Point Mechanicsburg), 6404649 FN 54SS (Naval Inventory Control Point Mechanicsburg).
Key specifications for DF6503-172 FN 51SS: Criticality Code Justification: ZZZY; Special Features: NUT,DISC HULL VALVE; Material: NICKEL ALLOY OVERALL; Reference Number Differentiating Characteristics: QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS. 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.