The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-708-6646, 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 7 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 | 5310-01-708-6646 |
| Primary Part Number | H55038-3CD |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANTDRY FILM LUBRICANT |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 900.0 FAHRENHEIT NOMINAL900.0 FAHRENHEIT NOMINAL DEGF |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | DOUBLE HEXAGONDOUBLE HEXAGON |
| Thread Class | 3B3B |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| H55038-3CD PRIMARY | Howmet Global Fastening Systems Inc (USA) |
NSN 5310-01-708-6646 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-708-6646 has 1 manufacturer part number on file: H55038-3CD (Howmet Global Fastening Systems Inc).
Key specifications for H55038-3CD: Lubrication: DRY FILM LUBRICANTDRY FILM LUBRICANT; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 900.0 FAHRENHEIT NOMINAL900.0 FAHRENHEIT NOMINAL DEGF; Special Features: 12 POINT, SELF-LOCKING, 220 KSI12 POINT, SELF-LOCKING, 220 KSI. 7 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.