The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-559-8191, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Controls, Inc. Div Actuation Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-559-8191 |
| Primary Part Number | 6121D2 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Controls, Inc. Div Actuation Division |
| Status | ACTIVE |
| Plate Thickness | 0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN |
| Nut Length | 1.281 INCHES NOMINAL IN |
| Thread Series | UNF |
| Plate Width | 0.500 INCHES NOMINAL IN |
| Temp Rating | 550.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | MIL-S-866 MIL SPEC 1ST MATERIAL RESPONSE OR AMS5024 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Mounting Provision Location | OPPOSITE NUT PROJECTION SIDE |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.323 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Welding Projection Quantity | 2 |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Nut Mounting Provision | WELDING PROJECTIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-559-8191 is a Nut,self-Locking,plate, manufactured by Curtiss-Wright Controls, Inc. Div Actuation Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-559-8191 has 2 manufacturer part numbers on file: 52ZA1P048 (Esna, Llc), 6121D2 (Curtiss-Wright Controls, Inc. Div Actuation Division).
Key specifications for 6121D2: Plate Thickness: 0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN; Nut Length: 1.281 INCHES NOMINAL IN; Thread Series: UNF; Plate Width: 0.500 INCHES NOMINAL IN. 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.