The Nut,plain,round, cataloged under National Stock Number 5310-00-283-4640, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-283-4640 |
| Primary Part Number | 7M20A-40 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Hole Configuration Style | CONFIGURATION J |
| Material Document and Classification | QQ-A-200/3,TEMPER T81 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-T-700/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.190 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.500 INCHES IN |
| Nut Diameter | 2.992 INCHES MINIMUM AND 3.008 INCHES MAXIMUM IN |
| Drive Point Depth | 0.120 INCHES NOMINAL IN |
| Nut Thickness | 0.312 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN |
| Drilled Hole Diameter | 0.063 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Countersink Angle | 45.0 DEGREES NOMINAL NUT |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Type and Quantity | 4 DRILLED |
| 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 |
|---|---|
| 7M20A-40 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5310-00-283-4640 is a Nut,plain,round, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-283-4640 has 1 manufacturer part number on file: 7M20A-40 (The Boeing Company Div Defense).
Key specifications for 7M20A-40: Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Hole Configuration Style: CONFIGURATION J; Material Document and Classification: QQ-A-200/3,TEMPER T81 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-T-700/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.