The Washer,seal, cataloged under National Stock Number 5310-01-528-4379, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Washer,seal |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Hastings Deering (aust) Pty Ltd (CAGE ZF912); William Adams Pty Ltd (CAGE Z2ZA9); Westrac Equipment Pty Ltd (CAGE Z02C9) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-528-4379 |
| Primary Part Number | 126-1757 |
| Item Name | Washer,seal |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| 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 |
|---|---|
| 126-1757 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 126-1757 | Hastings Deering (aust) Pty Ltd (AUS) |
| 126-1757 | William Adams Pty Ltd (AUS) |
| 126-1757 | Westrac Equipment Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| 126-1757 | 5/9 Secondary reference Caterpillar of Australia Pty Ltd |
| 16KP211 | 5/9 Secondary reference Oshkosh Corp |
| 16KP211 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 5310-01-528-4379 is a Washer,seal, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-528-4379 has 4 manufacturer part numbers on file: 126-1757 (Caterpillar Inc Div Caterpillar Defense), 126-1757 (Hastings Deering (aust) Pty Ltd), 126-1757 (William Adams Pty Ltd), 126-1757 (Westrac Equipment Pty Ltd).
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.