The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-486-1334, 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 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-486-1334 |
| Primary Part Number | H53777-8 |
| 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 | 0.786 INCHES MAXIMUM IN |
| Width Across Flats | 0.625 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM |
| Washer Thickness | 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5732 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Style | DOUBLE 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 | X |
| Part Number | Manufacturer |
|---|---|
| H53777-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST2785-14 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 92617-820 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| LH3587-8 | 5/9 Secondary reference Harvard Industries Inc |
| LH3587-8 | C/1 Advisory reference — outside the item-of-supply concept Esna, Llc |
| VN4761BB080 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-486-1334 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-486-1334 has 3 manufacturer part numbers on file: H53777-8 (Howmet Global Fastening Systems Inc), ST2785-14 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 92617-820 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for H53777-8: Overall Height: 0.548 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN; Washer Outside Diameter: 0.786 INCHES MAXIMUM IN; Width Across Flats: 0.625 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 13 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.