The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-568-0756, 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 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-568-0756 |
| Primary Part Number | 501-4457016 ITEM NO 25L1 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Material | STEEL CORROSION RESISTING OVERALL |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL 1 ITEMS. CRITICAL ITEM FOR SAFETY AND SUTVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUR VEHICELS AS DIFFERENTIATED BY SPECIAL TEST FEATURES. |
| 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 |
|---|---|
| 501-4457016 ITEM NO 25L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| MOD 4457023-25 SPEC ER 38908L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-4457023 MOD PER ER 38908L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-86 ITEM NO 25L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-4457023 ITEM NO 25L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-77 ITEM NO 25L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 501-4457023 MOD PER ER 38908 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6503-77 ITEM 25 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 501-4457016 ITEM NO 25 | 5/1 Secondary reference U.S. Government activity |
| 6503-86 ITEM NO 25 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| MOD 4457023-25 SPEC ER 38908 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 501-4457023 ITEM NO 25 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-568-0756 is a Nut,self-Locking,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-568-0756 has 6 manufacturer part numbers on file: 501-4457016 ITEM NO 25L1 (Naval Inventory Control Point Mechanicsburg), MOD 4457023-25 SPEC ER 38908L1 (Naval Inventory Control Point Mechanicsburg), 501-4457023 MOD PER ER 38908L1 (Naval Inventory Control Point Mechanicsburg), 6503-86 ITEM NO 25L1 (Naval Inventory Control Point Mechanicsburg), 501-4457023 ITEM NO 25L1 (Naval Inventory Control Point Mechanicsburg) and 1 more.
Key specifications for 501-4457016 ITEM NO 25L1: Criticality Code Justification: ZZZY; Special Features: NUT, TWO INCHES -4-1/2 UNC-2B, CRES.; Material: STEEL CORROSION RESISTING OVERALL; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL 1 ITEMS. CRITICAL ITEM FOR SAFETY AND SUTVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUR VEHICELS AS DIFFERENTIATED BY SPECIAL TEST FEATURES.. 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.