The Nut,plain,round, cataloged under National Stock Number 5310-00-052-1228, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-052-1228 |
| Primary Part Number | 65255-02077-101 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc |
| Status | ACTIVE |
| Thread Series | UN |
| Material Document and Classification | QQ-A-225/4,TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.750 INCHES IN |
| Nut Diameter | 3.500 INCHES NOMINAL IN |
| Drive Point Depth | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Nut Thickness | 0.560 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE AND PAINT OVERALL |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 16 |
| Material | ALUMINUM ALLOY 2014 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 |
|---|---|
| 65255-02077-101 | Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc (USA) |
| 65255-02077-101 PRIMARY | Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc (USA) |
| Reference | Meaning |
|---|---|
| 65255-02077-101 | 7/2 Vendor item drawing reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 5310-00-052-1228 is a Nut,plain,round, manufactured by Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-052-1228 has 2 manufacturer part numbers on file: 65255-02077-101 (Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc), 65255-02077-101 (Mcmellon Bros., Incorporated Dba Mc Mellon Brothers Inc).
Key specifications for 65255-02077-101: Thread Series: UN; Material Document and Classification: QQ-A-225/4,TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Drive Point Width: 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND. 14 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.