The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-089-2170, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-089-2170 |
| Primary Part Number | K50371-3 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Plate Thickness | 0.041 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN |
| Nut Length | 0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.310 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Removable Nut Manufacturer Part Number | 768277 |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Nut Height | 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Removable Nut Manufacturer Code | 77445 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-089-2170 is a Nut,self-Locking,plate, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-089-2170 has 2 manufacturer part numbers on file: 768277 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), K50371-3 (Howmet Global Fastening Systems Inc).
Key specifications for K50371-3: Overall Height: 0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Plate Thickness: 0.041 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN; Nut Length: 0.888 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 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.