The Washer,key, cataloged under National Stock Number 5310-00-033-2420, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-033-2420 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| External Straight Key Length | 0.377 INCHES NOMINAL IN |
| Overall Distance Including Keys | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Peening Key Length | 0.471 INCHES NOMINAL IN |
| Material Thickness | 0.030 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN |
| External Straight Key Width | 0.365 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| External Prebent Key Angle | 30.0 DEGREES NOMINAL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.316 INCHES MINIMUM AND 0.324 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 |
| Reference | Meaning |
|---|---|
| 10-4226 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
| 10-4226 | 5/9 Secondary reference Continental Aerospace Technologies, Inc. |
| 10-4226 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
| 10-4226 | 5/9 Secondary reference Unison Industries Llc |
NSN 5310-00-033-2420 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4810-00-554-8900, 5961-00-917-3266. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-033-2420: External Straight Key Length: 0.377 INCHES NOMINAL IN; Overall Distance Including Keys: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN; Style Designator: KEY; Peening Key Length: 0.471 INCHES NOMINAL IN. 10 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.