The Nut,self-Locking,wing, cataloged under National Stock Number 5310-01-256-9251, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aero Stop Nut Corp. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-256-9251 |
| Primary Part Number | 21WC0832 |
| Item Name | Nut,self-Locking,wing |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aero Stop Nut Corp |
| Status | ACTIVE |
| Body Diameter | 0.375 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Hole Configuration Style | CONFIGURATION K |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL NONMETALLIC DESIGN |
| Nut Style | WING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | ZINC ALLOY FIRST END |
| Fabrication Method | CAST |
| Wing Spread Width | 1.031 INCHES NOMINAL IN |
| 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 |
|---|---|
| 21WC0832 PRIMARY | Aero Stop Nut Corp (USA) |
| Reference | Meaning |
|---|---|
| 0N359733-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-256-9251 is a Nut,self-Locking,wing, manufactured by Aero Stop Nut Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-256-9251 has 1 manufacturer part number on file: 21WC0832 (Aero Stop Nut Corp).
Key specifications for 21WC0832: Body Diameter: 0.375 INCHES NOMINAL IN; Overall Height: 0.500 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hole Configuration Style: CONFIGURATION K. 12 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.