The Coupling,pipe, cataloged under National Stock Number 4730-01-271-9787, 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 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-271-9787 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | SWIVEL NUT INVERTED FLARE (PIPE) SECOND END |
| Nominal Overall Length | 1.250 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END BULKHEAD |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | QQ-S-634,GRADE 1020,COND CF FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.625 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 0.125 INCHES ALL ENDS IN |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Quantity Per Inch | 3A FIRST END BULKHEAD A |
| Material | STEEL OVERALL |
| Thread Series Designator | NPT ALL ENDS |
| Thread Series Designator | UNF FIRST END BULKHEAD |
| 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 |
|---|---|
| 416763-1 | 3/2 Design control — primary reference U.S. Government activity |
| 416763 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-271-9787 is a Coupling,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-271-9787: Connection Style: PLAIN (PIPE) FIRST END; Connection Style: SWIVEL NUT INVERTED FLARE (PIPE) SECOND END; Nominal Overall Length: 1.250 INCHES IN; Connection Type: THREADED EXTERNAL TUBE FIRST END BULKHEAD. 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.