The Nut,union, cataloged under National Stock Number 4730-01-430-2756, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-430-2756 |
| Primary Part Number | 803-6983468-PC153 |
| 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 | 1.781 INCHES NOMINAL IN |
| Shoulder Step Width | 0.145 INCHES NOMINAL IN |
| Thread Series | UNS |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.491 INCHES IN |
| Nut Height | 0.734 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 14 |
| Material | COPPER ALLOY OVERALL |
| Smallest Inside Diameter | 1.220 INCHES NOMINAL IN |
| Shoulder Seat Diameter | 1.419 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 |
| Part Number | Manufacturer |
|---|---|
| 803-6983468-PC153 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6983468 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-430-2756 is a Nut,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-430-2756 has 1 manufacturer part number on file: 803-6983468-PC153 (Naval Sea Systems Command).
Key specifications for 803-6983468-PC153: Width Across Flats: 1.781 INCHES NOMINAL IN; Shoulder Step Width: 0.145 INCHES NOMINAL IN; Thread Series: UNS; Material Document and Classification: ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.