The Coupling Assembly,self-Sealing, cataloged under National Stock Number 4730-01-263-5683, 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 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-263-5683 |
| Item Name | Coupling Assembly,self-Sealing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN FIRST QUICK DISCONNECT END |
| Supplementary Features | P/N 261-P-04 NUT,P/N 260-P-04 PLASTIC SLEEVE |
| Connection Type | THREADED EXTERNAL BOSS SECOND QUICK DISCONNECT END |
| Connection Type | UNTHREADED EXTERNAL TUBE FIRST QUICK DISCONNECT END |
| Style Designator | COUPLING ASSEMBLY |
| Material Document and Classification | ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J463,UNS C36000 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST QUICK DISCONNECT END IN |
| Operating Pressure | 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.406 INCHES NOMINAL IN |
| Features Provided | SELF-SEALING |
| Nominal Thread Size | 0.375 INCHES SECOND QUICK DISCONNECT END IN |
| Maximum Operating Temp | 175.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Thread Class | 2A SECOND QUICK DISCONNECT END A |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | UNF SECOND QUICK DISCONNECT END |
| 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 |
|---|---|
| 293-P-04X04 | 3/9 Design control — primary reference Imperial |
NSN 4730-01-263-5683 is a Coupling Assembly,self-Sealing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-263-5683: Connection Style: PLAIN FIRST QUICK DISCONNECT END; Supplementary Features: P/N 261-P-04 NUT,P/N 260-P-04 PLASTIC SLEEVE; Connection Type: THREADED EXTERNAL BOSS SECOND QUICK DISCONNECT END; Connection Type: UNTHREADED EXTERNAL TUBE FIRST QUICK DISCONNECT END. 15 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.