The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-00-386-9557, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-386-9557 |
| Primary Part Number | F2E9C |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Washer Outside Diameter | 1.062 INCHES NOMINAL IN |
| Width Across Flats | 0.625 INCHES NOMINAL IN |
| Thread Series | UNF |
| Washer Thickness | 0.125 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 55F1 1-4E30DPC12 | Fairbanks Morse, Llc (USA) |
| F2E9C PRIMARY | Fairbanks Morse, Llc (USA) |
| 55F1 1-4E30APC12 | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| F2E9C | 5/9 Secondary reference U.S. Government activity |
| 381-4105-521059ALT4PC12 | 3/2 Design control — primary reference U.S. Government activity |
| 55F1 1-4E30APC12 | 5/9 Secondary reference U.S. Government activity |
| 381-4105-521062ALT4PC12 | 5/2 Secondary reference U.S. Government activity |
| 55F1 1-4E30DPC12 | 5/9 Secondary reference U.S. Government activity |
| 381-4105-521055ALT4PC12 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-386-9557 is a Nut,plain,extended Washer,hexago, manufactured by Fairbanks Morse, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-386-9557 has 3 manufacturer part numbers on file: 55F1 1-4E30DPC12 (Fairbanks Morse, Llc), F2E9C (Fairbanks Morse, Llc), 55F1 1-4E30APC12 (Fairbanks Morse, Llc).
Key specifications for F2E9C: Overall Height: 0.938 INCHES NOMINAL IN; Washer Outside Diameter: 1.062 INCHES NOMINAL IN; Width Across Flats: 0.625 INCHES NOMINAL IN; Thread Series: UNF. 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.