The Coupling,pipe, cataloged under National Stock Number 4730-01-395-7403, 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 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-395-7403 |
| Primary Part Number | 6351074-5 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 2.000 INCHES SECOND END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 3.250 INCHES IN |
| Connection Type | UNTHREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | THREADED AND PLAIN |
| Nominal Thread Size | 2.000 INCHES FIRST END IN |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | NPT FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6351074-5 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 122-7064174 PC9 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 6351074 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-395-7403 is a Coupling,pipe, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-395-7403 has 1 manufacturer part number on file: 6351074-5 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-397-5415, 4730-01-397-5416, 4730-01-641-0797. Verify interchangeability with system specifications before substitution.
Key specifications for 6351074-5: Nominal Pipe Size Accommodated: 2.000 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 3.250 INCHES IN. 10 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.