The Nut,union, cataloged under National Stock Number 4730-01-166-6150, 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14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-166-6150 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 3.500 INCHES NOMINAL IN |
| Shoulder Step Width | 0.375 INCHES NOMINAL IN |
| Shoulder Width | 0.413 INCHES NOMINAL IN |
| Thread Series | UNS |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.062 INCHES IN |
| Nut Height | 1.500 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 304 OVERALL |
| Smallest Inside Diameter | 2.585 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 2.556 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 |
|---|---|
| 14-11-0208 | 3/2 Design control — primary reference U.S. Government activity |
| 508-4677443 IT F11 | 5/2 Secondary reference U.S. Government activity |
| 508-4677443 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-166-6150 is a Nut,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-166-6150: Width Across Flats: 3.500 INCHES NOMINAL IN; Shoulder Step Width: 0.375 INCHES NOMINAL IN; Shoulder Width: 0.413 INCHES NOMINAL IN; Thread Series: UNS. 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.