The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-050-6899, 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 15 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-050-6899 |
| Primary Part Number | H42-8 |
| 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 LUBRICANT |
| Washer Outside Diameter | 0.820 INCHES MAXIMUM IN |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Washer Thickness | 0.080 INCHES NOMINAL IN |
| Material Document and Classification | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 | F |
| Part Number | Manufacturer |
|---|---|
| P35040 | Safran Martin-Baker France (FRA) |
| H42-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 860292-12 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
| H42-8 | 5/9 Secondary reference Tecnotec Sarl |
| H42-8 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| H42-8 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc. Div Microdot Products |
| 860292-12 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| 860292-0012 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| 860292-0012 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5310-00-050-6899 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-050-6899 has 2 manufacturer part numbers on file: P35040 (Safran Martin-Baker France), H42-8 (Howmet Global Fastening Systems Inc).
Key specifications for H42-8: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.480 INCHES MAXIMUM IN; Washer Outside Diameter: 0.820 INCHES MAXIMUM IN; Width Across Flats: 0.562 INCHES NOMINAL IN. 15 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.