The Washer,key, cataloged under National Stock Number 5310-00-272-6479, 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 10 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-272-6479 |
| Primary Part Number | NAFB2444A |
| 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 | 0.588 INCHES NOMINAL0.588 INCHES NOMINAL IN |
| External Prebent Key Length | 0.037 INCHES NOMINAL0.037 INCHES NOMINAL IN |
| Style Designator | KEYKEY |
| Material Document and Classification | QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.250 INCHES NOMINAL1.250 INCHES NOMINAL IN |
| Material Thickness | 0.059 INCHES NOMINAL0.059 INCHES NOMINAL IN |
| External Key Quantity | 11 |
| External Prebent Key Width | 0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.437 INCHES NOMINAL0.437 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 |
|---|---|
| NAFB2444A PRIMARY | Fairbanks Morse, Llc (USA) |
| MAFB4578B | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| 9AF9B4578APC25 | 5/9 Secondary reference U.S. Government activity |
| 13AF10B4578APC25 | 5/9 Secondary reference U.S. Government activity |
| MAFB4578B | 5/9 Secondary reference U.S. Government activity |
| MFAFB4578APC25 | 5/9 Secondary reference U.S. Government activity |
| MAAFB4578APC25 | 5/9 Secondary reference U.S. Government activity |
| NAFB2444A | 3/9 Design control — primary reference U.S. Government activity |
| MCAFB4578APC25 | 5/9 Secondary reference U.S. Government activity |
| 22AF10C4578BPC25 | 5/9 Secondary reference U.S. Government activity |
| MBAFB4578APC25 | 5/9 Secondary reference U.S. Government activity |
| 21SAF10B4578APC25 | 5/9 Secondary reference U.S. Government activity |
| 33SAF10B4578BPC25 | 5/9 Secondary reference U.S. Government activity |
| 22AF10C4578APC25 | 5/9 Secondary reference U.S. Government activity |
| AFC2444A | 5/9 Secondary reference U.S. Government activity |
| MDAFB4578APC25 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-272-6479 is a Washer,key, manufactured by Fairbanks Morse, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-272-6479 has 2 manufacturer part numbers on file: NAFB2444A (Fairbanks Morse, Llc), MAFB4578B (Fairbanks Morse, Llc).
Key specifications for NAFB2444A: Distance From Centerline to Inside of Prebent Key: 0.588 INCHES NOMINAL0.588 INCHES NOMINAL IN; External Prebent Key Length: 0.037 INCHES NOMINAL0.037 INCHES NOMINAL IN; Style Designator: KEYKEY; Material Document and Classification: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.