The Washer,flat, cataloged under National Stock Number 5310-01-308-2643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meritor Industrial Products, Llc. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Paccar Parts U.k. Limited (CAGE U0747); Leyland Trucks Ltd (for Spare Parts See U6425) (CAGE U5612); Meritor Industrial Products, Llc (CAGE 3D6E9); Meritor Heavy Vehicle Systems Ltd (CAGE K4998) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-308-2643 |
| Primary Part Number | WA-18 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meritor Industrial Products, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| Y030 139 03 | Paccar Parts U.k. Limited (GBR) |
| ABU7091 | Leyland Trucks Ltd (for Spare Parts See U6425) (GBR) |
| WA-18 PRIMARY | Meritor Industrial Products, Llc (USA) |
| WA-18 | Meritor Heavy Vehicle Systems Ltd (GBR) |
| Reference | Meaning |
|---|---|
| WA-18 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
NSN 5310-01-308-2643 is a Washer,flat, manufactured by Meritor Industrial Products, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-308-2643 has 4 manufacturer part numbers on file: Y030 139 03 (Paccar Parts U.k. Limited), ABU7091 (Leyland Trucks Ltd (for Spare Parts See U6425)), WA-18 (Meritor Industrial Products, Llc), WA-18 (Meritor Heavy Vehicle Systems Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-501-8569. Verify interchangeability with system specifications before substitution.
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.