The Washer,key, cataloged under National Stock Number 5310-00-321-9974, 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. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-321-9974 |
| Primary Part Number | R002304 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meritor Industrial Products, Llc |
| Status | ACTIVE |
| Internal Straight Key Width | 0.375 INCHES NOMINAL IN |
| Distance From Centerline to Top of Internal Key | 3.338 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 4.500 INCHES NOMINAL IN |
| Material Thickness | 0.249 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 3.255 INCHES MINIMUM AND 3.265 INCHES MAXIMUM 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 |
|---|---|
| 1229U1009 | Meritor Industrial Products, Llc (USA) |
| 2568P11 | Taylor Machine Works Inc (USA) |
| R002304 | Meritor Heavy Vehicle Systems, Llc (USA) |
| R002304 PRIMARY | Meritor Industrial Products, Llc (USA) |
| 1229U1009 | Meritor Heavy Vehicle Systems Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 69305R1 | 5/2 Secondary reference U.S. Government activity |
| 1229U1009 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
NSN 5310-00-321-9974 is a Washer,key, manufactured by Meritor Industrial Products, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-321-9974 has 5 manufacturer part numbers on file: 1229U1009 (Meritor Industrial Products, Llc), 2568P11 (Taylor Machine Works Inc), R002304 (Meritor Heavy Vehicle Systems, Llc), R002304 (Meritor Industrial Products, Llc), 1229U1009 (Meritor Heavy Vehicle Systems Ltd).
Key specifications for R002304: Internal Straight Key Width: 0.375 INCHES NOMINAL IN; Distance From Centerline to Top of Internal Key: 3.338 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 4.500 INCHES NOMINAL IN. 8 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.