The Reducer,tube, cataloged under National Stock Number 4730-01-379-9237, 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-379-9237 |
| Primary Part Number | 595-6404645-12 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 2.750 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.700 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.845 INCHES FIRST END IN |
| Nominal Thread Size | 1.000 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Material | COPPER ALLOY AND NICKEL ALLOY OVERALL |
| Thread Series Designator | UNF SECOND END |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 595-6404645-12 PRIMARY | Naval Sea Systems Command (USA) |
| 211016574 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 595-6404645-13 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 595-6404645 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-379-9237 is a Reducer,tube, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-379-9237 has 2 manufacturer part numbers on file: 595-6404645-12 (Naval Sea Systems Command), 211016574 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-657-3954. Verify interchangeability with system specifications before substitution.
Key specifications for 595-6404645-12: Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 2.750 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE FIRST END; Nominal Outside Diameter Tube Accommodated: 0.700 INCHES SECOND END 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.