The Nut,sleeve, cataloged under National Stock Number 5310-00-331-5257, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kidde-Fenwal, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-331-5257 |
| Primary Part Number | 241109 |
| Item Name | Nut,sleeve |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kidde-Fenwal, Llc |
| Status | ACTIVE |
| Flange Width Across Flats | 0.750 INCHES NOMINAL IN |
| Nut Length | 0.318 INCHES NOMINAL IN |
| Flange Thickness | 0.125 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.498 INCHES NOMINAL IN |
| Cross-Sectional Shape | ROUND SECOND END |
| Cross-Sectional Shape | HEXAGONAL FIRST END |
| Countersink Angle | 90.0 DEGREES NOMINAL NUT |
| Nut Style | SLEEVE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| 241109 | Kidde-Fenwal, Llc (USA) |
| Reference | Meaning |
|---|---|
| 241109 | 3/9 Design control — primary reference Davey Compressor Co Div of Keco Industries Inc |
| 241109 | 5/2 Secondary reference U.S. Government activity |
| 241109 | 5/9 Secondary reference Drs Environmental Systems Inc |
NSN 5310-00-331-5257 is a Nut,sleeve, manufactured by Kidde-Fenwal, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-331-5257 has 1 manufacturer part number on file: 241109 (Kidde-Fenwal, Llc).
Key specifications for 241109: Flange Width Across Flats: 0.750 INCHES NOMINAL IN; Nut Length: 0.318 INCHES NOMINAL IN; Flange Thickness: 0.125 INCHES NOMINAL IN; Thread Series: UNF. 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.