The Nut,union, cataloged under National Stock Number 4730-01-599-0059, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-599-0059 |
| Primary Part Number | 803-7657203ITEM38 |
| Item Name | Nut,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.798 INCHES MINIMUM AND 1.813 INCHES MAXIMUM IN |
| Shoulder Step Width | 0.145 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Shoulder Width | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Thread Series | UNS |
| Hole Configuration Style | CONFIGURATION C |
| Material Document and Classification | QQ-N-281, CL A, UN N04400 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Nominal Thread Size | 1.5 INCHES IN |
| Nut Height | 0.73 INCHES MINIMUM AND 0.79 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 14 |
| Material | NICKEL ALLOY 400 NUT |
| Smallest Inside Diameter | 1.21 INCHES MINIMUM AND 1.23 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 |
| Part Number | Manufacturer |
|---|---|
| 803-7657203ITEM38 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4730-01-599-0059 is a Nut,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-599-0059 has 1 manufacturer part number on file: 803-7657203ITEM38 (Naval Sea Systems Command).
Key specifications for 803-7657203ITEM38: Width Across Flats: 1.798 INCHES MINIMUM AND 1.813 INCHES MAXIMUM IN; Shoulder Step Width: 0.145 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Shoulder Width: 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; Thread Series: UNS. 12 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.