The Nut,union, cataloged under National Stock Number 4730-01-121-7824, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-121-7824 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Shoulder Step Width | 0.255 INCHES NOMINAL IN |
| Shoulder Width | 0.250 INCHES NOMINAL IN |
| Thread Series | UNS |
| Material Document and Classification | MIL-C-20159,TYPE I MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.312 INCHES IN |
| Nut Diameter | 2.560 INCHES NOMINAL IN |
| Nut Height | 1.190 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 1.930 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 1.940 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2621-713-01 PIECE 65 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-713-01 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-121-7824 is a Nut,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-121-7824: Shoulder Step Width: 0.255 INCHES NOMINAL IN; Shoulder Width: 0.250 INCHES NOMINAL IN; Thread Series: UNS; Material Document and Classification: MIL-C-20159,TYPE I MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.