The Reducer,tube, cataloged under National Stock Number 4730-01-338-5375, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-338-5375 |
| Primary Part Number | 524-6603688-VHBA-117 |
| 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 (TUBE) SECOND END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Nominal Overall Length | 1.000 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES SECOND END IN |
| Nominal Thread Size | 0.625 INCHES FIRST END IN |
| Nominal Thread Size | 1.000 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Class | 2B FIRST END |
| Thread Series Designator | UNEF FIRST END |
| Thread Series Designator | UNEF 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 |
|---|---|
| 524-6603688-VHBA-117 | Naval Sea Systems Command (USA) |
| 803-5959303-X-106,108 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5959303 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5959303-106,108 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-338-5375 is a Reducer,tube, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-338-5375 has 2 manufacturer part numbers on file: 524-6603688-VHBA-117 (Naval Sea Systems Command), 803-5959303-X-106,108 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-339-9826, 4810-01-375-0506. Verify interchangeability with system specifications before substitution.
Key specifications for 524-6603688-VHBA-117: Connection Style: PLAIN (TUBE) SECOND END; Connection Style: PLAIN (TUBE) FIRST END; Nominal Overall Length: 1.000 INCHES IN; Connection Type: THREADED EXTERNAL TUBE SECOND END. 14 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.