The Nut,plain,extended Washer,double, cataloged under National Stock Number 5310-01-309-7068, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 16 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. 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 | 5310-01-309-7068 |
| Primary Part Number | H52125-836 |
| Item Name | Nut,plain,extended Washer,double |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.281 INCHES MAXIMUM IN |
| Width Across Flats | 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 1200.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.040 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5736 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | SURFACE TREATMENT SILVER |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 36 |
| Material | IRON ALLOY 660 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 |
|---|---|
| H52125-836 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 88269 | Williams International Co., L.l.c. (USA) |
NSN 5310-01-309-7068 is a Nut,plain,extended Washer,double, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-309-7068 has 2 manufacturer part numbers on file: H52125-836 (Howmet Global Fastening Systems Inc), 88269 (Williams International Co., L.l.c.).
1 possible match (shared part number, not a government interchangeability claim): 2910-01-615-3380. Verify interchangeability with system specifications before substitution.
Key specifications for H52125-836: Overall Height: 0.200 INCHES MAXIMUM IN; Washer Outside Diameter: 0.281 INCHES MAXIMUM IN; Width Across Flats: 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 16 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.