The Nut,union, cataloged under National Stock Number 4730-01-434-6672, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-434-6672 |
| Primary Part Number | 801-6758238 PC8 |
| 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 | 2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM IN |
| Shoulder Step Width | 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Shoulder Width | 0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN |
| Thread Series | UNS |
| Temp Rating | 125.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Maximum Working Pressure Rating and Service for Which Designed | 3000.0 POUNDS PER SQUARE INCH (PSI) WATER LBS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.312 INCHES IN |
| Nut Height | 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY OVERALL |
| Smallest Inside Diameter | 1.940 INCHES MINIMUM AND 1.943 INCHES MAXIMUM IN |
| Shoulder Seat Diameter | 2.317 INCHES MINIMUM AND 2.327 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 |
|---|---|
| 801-6758238 PC8 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6758238 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2633-791-04PC8 | 3/2 Design control — primary reference U.S. Government activity |
| 2633-791-04 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-434-6672 is a Nut,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-434-6672 has 1 manufacturer part number on file: 801-6758238 PC8 (Naval Sea Systems Command).
Key specifications for 801-6758238 PC8: Width Across Flats: 2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM IN; Shoulder Step Width: 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Shoulder Width: 0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN; Thread Series: UNS. 16 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.