The Nut,plain,clinch, cataloged under National Stock Number 5310-00-124-3143, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-124-3143 |
| Primary Part Number | CLS-0420-2 |
| Item Name | Nut,plain,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.438 INCHES NOMINAL IN |
| Pilot Diameter | 0.342 INCHES NOMINAL IN |
| Pilot Length | 0.087 INCHES NOMINAL IN |
| Nut Height | 0.259 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | CLINCH |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| CLS-0420-2 PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 18010D-SS-2520 | 5/9 Secondary reference New Haven Mfg Corp Amatom Electronic Hardware Div |
| 720NKS-(0.091) | 5/9 Secondary reference U.S. Government activity |
| 731-00444-20 | 5/9 Secondary reference Gte Communication Systems Corp |
| 5486639-0056 | 5/9 Secondary reference Naval Sea Systems Command |
| 84001097-033 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5310-00-124-3143 is a Nut,plain,clinch, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-124-3143 has 1 manufacturer part number on file: CLS-0420-2 (Penn Engineering & Manufacturing Corp).
Key specifications for CLS-0420-2: Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN; Nut Diameter: 0.438 INCHES NOMINAL IN. 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.