The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-078-8169, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems (operations) Limited. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-078-8169 |
| Primary Part Number | 229-006491 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bae Systems (operations) Limited |
| Status | ACTIVE |
| Washer Outside Diameter | 0.900 INCHES NOMINAL IN |
| Width Across Flats | 0.745 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ELLIOTT BROS.LTD.BLACKEN WITH EBONOL C IAW +1S 17.DULL FINISH REQUIRED MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Washer Thickness | 0.470 INCHES NOMINAL IN |
| Material Document and Classification | ELLIOTT BROS.LTD.HIDURAX SPECIAL DTD.900/4805 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| 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 |
|---|---|
| 229-006491 PRIMARY | Bae Systems (operations) Limited (GBR) |
NSN 5310-01-078-8169 is a Nut,plain,extended Washer,hexago, manufactured by Bae Systems (operations) Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-078-8169 has 1 manufacturer part number on file: 229-006491 (Bae Systems (operations) Limited).
Key specifications for 229-006491: Overall Height: 0.750 INCHES NOMINAL IN; Washer Outside Diameter: 0.900 INCHES NOMINAL IN; Width Across Flats: 0.745 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ELLIOTT BROS.LTD.BLACKEN WITH EBONOL C IAW +1S 17.DULL FINISH REQUIRED MFR REF SINGLE TREATMENT RESPONSE OVERALL. 11 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.