The Adapter,straight,pipe to Hose, cataloged under National Stock Number 4730-01-511-7720, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-511-7720 |
| Primary Part Number | 803-6405409-AY31 |
| Item Name | Adapter,straight,pipe to Hose |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 CAP-CHAIN |
| Connection Style | PLAIN (HOSE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Nominal Overall Length | 3.370 INCHES IN |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED EXTERNAL HOSE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Operating Pressure | 350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.000 INCHES SECOND END IN |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Maximum Operating Temp | 150.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD FIRST END |
| Material | NICKEL ALLOY BODY |
| Material | NICKEL ALLOY CAP |
| Thread Series Designator | NPS FIRST END |
| Thread Series Designator | NPSH SECOND END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| DF330810-AY31 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 533-6985679-F116 | Naval Sea Systems Command (USA) |
| 803-6405409-AY31 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405409 | D/9 Drawing number reference only Naval Sea Systems Command |
| H645-2401-F116 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-511-7720 is a Adapter,straight,pipe to Hose, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-511-7720 has 3 manufacturer part numbers on file: DF330810-AY31 (Huntington Ingalls Inc Div Newport News Shipbuilding), 533-6985679-F116 (Naval Sea Systems Command), 803-6405409-AY31 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-511-7724, 4730-01-511-7726, 4730-01-725-9055. Verify interchangeability with system specifications before substitution.
Key specifications for 803-6405409-AY31: Furnished Items and Quantity: 1 CAP-CHAIN; Connection Style: PLAIN (HOSE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Nominal Overall Length: 3.370 INCHES IN. 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.