The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-358-7311, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cincinnati Gearing Systems Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-358-7311 |
| Primary Part Number | 15-0500-03225 ITEM 199 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cincinnati Gearing Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 1.030 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM 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 |
| Surface Treatment | SILVER OVERALL |
| 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 |
|---|---|
| 61170-1018 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 15-0500-03225 ITEM 199 PRIMARY | Cincinnati Gearing Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 15-0500-03225 ITEM 199 | 3/9 Design control — primary reference The Cincinnati Gear Company Dba Power Transmission Systems |
NSN 5310-01-358-7311 is a Nut,self-Locking,extended Washer, manufactured by Cincinnati Gearing Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-358-7311 has 2 manufacturer part numbers on file: 61170-1018 (Sps Technologies, Llc Dba PB Fasteners), 15-0500-03225 ITEM 199 (Cincinnati Gearing Systems Inc).
Key specifications for 15-0500-03225 ITEM 199: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.720 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN; Washer Outside Diameter: 1.030 INCHES MINIMUM AND 1.050 INCHES MAXIMUM IN; Width Across Flats: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN. 15 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.