The Nut,sleeve, cataloged under National Stock Number 5310-01-023-7481, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Concentric Rockford Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-023-7481 |
| Primary Part Number | GC3230 |
| Item Name | Nut,sleeve |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Concentric Rockford Inc |
| Status | ACTIVE |
| Flange Width Across Flats | 0.625 INCHES NOMINAL IN |
| Nut Length | 0.375 INCHES NOMINAL IN |
| Flange Thickness | 0.250 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Length | 0.375 INCHES NOMINAL OVERALL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Diameter | 0.625 INCHES NOMINAL IN |
| Cross-Sectional Shape | HEXAGONAL FLANGE |
| Nut Style | SLEEVE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| 4907129 PIECE 16 | Kalmar AC Inc (USA) |
| GC3230 PRIMARY | Concentric Rockford Inc (USA) |
| 0242787 | Kalmar AC Inc (USA) |
NSN 5310-01-023-7481 is a Nut,sleeve, manufactured by Concentric Rockford Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-023-7481 has 3 manufacturer part numbers on file: 4907129 PIECE 16 (Kalmar AC Inc), GC3230 (Concentric Rockford Inc), 0242787 (Kalmar AC Inc).
Key specifications for GC3230: Flange Width Across Flats: 0.625 INCHES NOMINAL IN; Nut Length: 0.375 INCHES NOMINAL IN; Flange Thickness: 0.250 INCHES NOMINAL IN; Thread Series: UNF. 13 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.