The Washer,lock, cataloged under National Stock Number 5310-01-657-4092, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-657-4092 |
| Primary Part Number | 4028882007 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PER F-100:D60, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | CARBON STEEL PER ASME B18.21.1-2009 SECTION 2.3 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.776 INCHES MAXIMUM IN |
| Material Thickness | 0.109 INCHES NOMINAL IN |
| Color | BLACK OVERALL |
| Surface Treatment | PHOSPHATE AND ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.440 INCHES MINIMUM IN |
| 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 |
|---|---|
| 4028882007 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4028882 | D/9 Drawing number reference only Oshkosh Defense Llc |
NSN 5310-01-657-4092 is a Washer,lock, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-657-4092 has 1 manufacturer part number on file: 4028882007 (Oshkosh Defense Llc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-659-6417. Verify interchangeability with system specifications before substitution.
Key specifications for 4028882007: Surface Treatment Document and Classification: PER F-100:D60, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: CARBON STEEL PER ASME B18.21.1-2009 SECTION 2.3 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.776 INCHES MAXIMUM IN. 9 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.