The Coupling,pipe, cataloged under National Stock Number 4730-01-330-8128, 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15 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-330-8128 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Nominal Overall Length | 4.120 INCHES IN |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | THREADED INTERNAL |
| Material Document and Classification | ASTM A153 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Nominal Thread Size | 3.000 INCHES ALL ENDS IN |
| Specification/standard Data | 80204-B16.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Maximum Operating Temp | 550.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Media for Which Designed | GAS SECOND RESPONSE |
| Material | IRON CAST MALLEABLE 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 |
|---|---|
| 1166-3 | 5/9 Secondary reference U.S. Government activity |
| F1G1166 3" | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| B16.3 | 5/1 Secondary reference U.S. Government activity |
| FIG1166-3 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4730-01-330-8128 is a Coupling,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5340-01-389-4164, 5340-01-577-1272. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-330-8128: Connection Style: PLAIN (PIPE) ALL ENDS; Nominal Overall Length: 4.120 INCHES IN; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: THREADED INTERNAL. 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.