The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-516-2590, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rexnord Industries, Llc Div Couplings Division. Government technical data includes 13 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 | 5310-01-516-2590 |
| Primary Part Number | 020995 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rexnord Industries, Llc Div Couplings Division |
| Status | ACTIVE |
| Washer Outside Diameter | 1.050 INCHES MAXIMUM IN |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.095 INCHES MINIMUM IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Countersink Angle | 90.0 DEGREES NOMINAL NUT |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | IRON ALLOY 660 OVERALL |
| 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 |
|---|---|
| 020995 PRIMARY | Rexnord Industries, Llc Div Couplings Division (USA) |
NSN 5310-01-516-2590 is a Nut,self-Locking,extended Washer, manufactured by Rexnord Industries, Llc Div Couplings Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-516-2590 has 1 manufacturer part number on file: 020995 (Rexnord Industries, Llc Div Couplings Division).
Key specifications for 020995: Overall Height: 0.740 INCHES MAXIMUM IN; Washer Outside Diameter: 1.050 INCHES MAXIMUM IN; Width Across Flats: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 13 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.