The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-661-4749, 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 10 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 | 5310-01-661-4749 |
| Primary Part Number | HM42-050 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Washer Outside Diameter | 8.0 MILLIMETERS MINIMUM MM |
| Width Across Flats | 6.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Temp Rating | 235.0 CELSIUS NOMINAL DEGC |
| Washer Thickness | 0.4 MILLIMETERS MINIMUM MM |
| Material Document and Classification | AMS5525 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR AMS5732 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| 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 |
|---|---|
| HM42-050 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
NSN 5310-01-661-4749 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-661-4749 has 1 manufacturer part number on file: HM42-050 (Howmet Global Fastening Systems Inc).
Key specifications for HM42-050: Overall Height: 5.0 MILLIMETERS MAXIMUM MM; Washer Outside Diameter: 8.0 MILLIMETERS MINIMUM MM; Width Across Flats: 6.0 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: AMS-QQ-P-35 ASSN STD SINGLE TREATMENT 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.