The Packing Nut, cataloged under National Stock Number 4730-01-623-2633, 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 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-623-2633 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 1.625 INCHES NOMINAL IN |
| Style Designator | IRREGULAR |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1.125-16 |
| Screw Thread Series Designator | UN |
| Material | COPPER ALLOY 922 |
| Smallest Inside Diameter | 0.569 INCHES MINIMUM AND 0.574 INCHES MAXIMUM 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 |
|---|---|
| 803-1385714-8X-37 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-623-2633 is a Packing Nut, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-623-2633: Width Across Flats: 1.625 INCHES NOMINAL IN; Style Designator: IRREGULAR; Overall Length: 1.531 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED. 7 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.