The Washer,keyway, cataloged under National Stock Number 5310-01-480-4383, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-480-4383 |
| Primary Part Number | 124-1678562 PC 503 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 1.266 INCHES NOMINAL IN |
| Style Designator | KEYWAY |
| Outside Diameter | 3.500 INCHES NOMINAL IN |
| Internal Keyway Quantity | 1 |
| Material Thickness | 0.109 INCHES NOMINAL IN |
| Angle From Center Line to Center of First Keyway | 45.0 DEGREES NOMINAL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 2.031 INCHES NOMINAL 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 |
|---|---|
| 124-1678563 PC 59 | Naval Sea Systems Command (USA) |
| 124-1678562 PC 503 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 1678563 | D/9 Drawing number reference only U.S. Government activity |
NSN 5310-01-480-4383 is a Washer,keyway, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-480-4383 has 2 manufacturer part numbers on file: 124-1678563 PC 59 (Naval Sea Systems Command), 124-1678562 PC 503 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-480-5748. Verify interchangeability with system specifications before substitution.
Key specifications for 124-1678562 PC 503: Distance From Centerline to Bottom of Internal Keyway: 1.266 INCHES NOMINAL IN; Style Designator: KEYWAY; Outside Diameter: 3.500 INCHES NOMINAL IN; Internal Keyway Quantity: 1. 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.