The Washer,key, cataloged under National Stock Number 5310-00-209-3774, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-209-3774 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.563 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5044 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Peening Key Length | 0.219 INCHES NOMINAL IN |
| Material Thickness | 0.029 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| External Key Quantity | 2 |
| External Prebent Key Angle | 30.0 DEGREES MINIMUM AND 90.0 DEGREES MAXIMUM |
| Internal Prebent Key Length | 0.141 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1010 OVERALL |
| Hole Diameter | 0.193 INCHES MINIMUM AND 0.213 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 |
|---|---|
| 10-3983 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
| A060264 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 10-3983 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 10-3983 | 5/9 Secondary reference Unison Industries Llc |
| 10-3983 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
NSN 5310-00-209-3774 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4530-01-108-7811. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-209-3774: Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.563 INCHES NOMINAL IN; Material Document and Classification: AMS 5044 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 13 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.