The Nut,plain,clinch, cataloged under National Stock Number 5310-01-144-6281, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Unicorp.. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-144-6281 |
| Primary Part Number | 42R21-M07-F15 |
| Item Name | Nut,plain,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Unicorp. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM FLANGE IN |
| Nut Counterbore Depth | 0.427 INCHES MINIMUM AND 0.442 INCHES MAXIMUM BOSS IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.312 INCHES MINIMUM AND 0.317 INCHES MAXIMUM FLANGE IN |
| Counterbore Diameter | 0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM BOSS IN |
| Pilot Diameter | 0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN |
| Pilot Length | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Nut Height | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE OVERALL |
| Countersink Angle | 90.0 DEGREES NOMINAL BOSS |
| Nut Style | CLINCH |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 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 |
|---|---|
| 42R21-M07-F15 PRIMARY | Unicorp. (USA) |
| Reference | Meaning |
|---|---|
| 6284E-SS-1032-6 | C/1 Advisory reference — outside the item-of-supply concept Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware |
| M143-182 | 5/9 Secondary reference Miltope Corporation |
| 6284E-SS-1032-6 | 5/9 Secondary reference New Haven Mfg Corp Amatom Electronic Hardware Div |
NSN 5310-01-144-6281 is a Nut,plain,clinch, manufactured by Unicorp., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-144-6281 has 1 manufacturer part number on file: 42R21-M07-F15 (Unicorp.).
Key specifications for 42R21-M07-F15: Surface Treatment Document and Classification: MIL-C-13924,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF; Material Document and Classification: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nut Counterbore Depth: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM FLANGE IN. 19 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.