The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-568-0713, 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 11 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-568-0713 |
| Primary Part Number | 501-4457023 ITEM 23L1 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Width Across Flats | 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Criticality Code Justification | ZZZY |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Nut Height | 0.855 INCHES MINIMUM AND 0.891 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| 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 SURVIVAL OD DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICALS 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 |
|---|---|
| 501-4457023 ITEM 23L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-158 ITEM 23L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| MS21046C12L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 6503-158 ITEM 23 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 501-4457023 ITEM 23 | 5/1 Secondary reference U.S. Government activity |
| MS21046C12 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-568-0713 is a Nut,self-Locking,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-568-0713 has 3 manufacturer part numbers on file: 501-4457023 ITEM 23L1 (Naval Inventory Control Point Mechanicsburg), 6503-158 ITEM 23L1 (Naval Inventory Control Point Mechanicsburg), MS21046C12L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 501-4457023 ITEM 23L1: Width Across Flats: 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN; Thread Series: UNF; Criticality Code Justification: ZZZY; Thread Direction: RIGHT-HAND. 11 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.