The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-331-3638, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-331-3638 |
| Primary Part Number | A122A2-66 |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Width Across Flats | 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | -75.0 CELSIUS MINIMUM AND 200.0 CELSIUS MAXIMUM DEGC |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Pilot Diameter | 0.183 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Pilot Length | 0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Nut Height | 0.240 INCHES MAXIMUM IN |
| Nut Style | CLINCH |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL 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 |
|---|---|
| A122A2-66 PRIMARY | Bsi Standards Limited (GBR) |
NSN 5310-00-331-3638 is a Nut,self-Locking,clinch, manufactured by Bsi Standards Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-331-3638 has 1 manufacturer part number on file: A122A2-66 (Bsi Standards Limited).
Key specifications for A122A2-66: Width Across Flats: 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: -75.0 CELSIUS MINIMUM AND 200.0 CELSIUS MAXIMUM DEGC; Thread Direction: RIGHT-HAND. 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.