The Washer,key, cataloged under National Stock Number 5310-00-209-4161, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-209-4161 |
| Primary Part Number | AEA4960A |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 1.375 INCHES NOMINAL IN |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.209 INCHES MINIMUM AND 1.229 INCHES MAXIMUM IN |
| Material Thickness | 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN |
| External Key Quantity | 1 |
| Material | COPPER ALLOY 464 OVERALL |
| Hole Diameter | 0.521 INCHES MINIMUM AND 0.541 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 |
|---|---|
| AEA4960A PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| AEA4960A | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-00-209-4161 is a Washer,key, manufactured by Fairbanks Morse, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-4161 has 1 manufacturer part number on file: AEA4960A (Fairbanks Morse, Llc).
Key specifications for AEA4960A: Distance From Centerline to Inside of Prebent Key: 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN; External Prebent Key Length: 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN; Overall Distance Including Keys: 1.375 INCHES NOMINAL IN; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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.