The Nut,sleeve, cataloged under National Stock Number 5310-01-240-0659, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-240-0659 |
| Primary Part Number | 6643225-3 |
| Item Name | Nut,sleeve |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Nut Length | 2.120 INCHES NOMINAL IN |
| Thread Series | UN |
| Nut Counterbore Depth | 1.880 INCHES NOMINAL NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Diameter | 2.000 INCHES NOMINAL IN |
| Counterbore Diameter | 1.380 INCHES NOMINAL NUT IN |
| Boss Thickness | 0.880 INCHES NOMINAL OVERALL IN |
| Boss Width Across Flats | 1.320 INCHES NOMINAL IN |
| Cross-Sectional Shape | HEXAGONAL BOSS |
| Cross-Sectional Shape | ROUND NUT |
| Surface Treatment | COPPER OVERALL |
| Nut Style | SLEEVE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 8 |
| 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 |
|---|---|
| 6643225-3 PRIMARY | General Electric Company (USA) |
| 6643225-3 | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 6643225 PIECE 3 | 3/9 Design control — primary reference General Electric Company |
NSN 5310-01-240-0659 is a Nut,sleeve, manufactured by General Electric Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-240-0659 has 2 manufacturer part numbers on file: 6643225-3 (General Electric Company), 6643225-3 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 6643225-3: Nut Length: 2.120 INCHES NOMINAL IN; Thread Series: UN; Nut Counterbore Depth: 1.880 INCHES NOMINAL NUT IN; Thread Direction: RIGHT-HAND. 16 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.