The Coupling,pipe, cataloged under National Stock Number 4730-00-595-0666, 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14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-595-0666 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.250 INCHES ALL ENDS IN |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM A216 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A234 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.250 INCHES ALL ENDS IN |
| Maximum Operating Temp | 260.0 CELSIUS FIRST RESPONSE DEGC |
| Maximum Operating Temp | 65.6 CELSIUS SECOND RESPONSE DEGC |
| Nondefinitive Spec/std Data | 2 TYPE |
| Surface Treatment | ZINC INSIDE |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| WW-P-521 | 4/1 Identification reference U.S. Government activity |
NSN 4730-00-595-0666 is a Coupling,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-595-0666: Nominal Pipe Size Accommodated: 1.250 INCHES ALL ENDS IN; Connection Style: PLAIN (PIPE) ALL ENDS; Style Designator: PLAIN; Material Document and Classification: ASTM A216 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A234 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.