The Reducer,tube, cataloged under National Stock Number 4730-01-425-2903, 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 Mueller Brass Co.. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-425-2903 |
| Primary Part Number | W1370 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mueller Brass Co. |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Nominal Overall Length | 3.250 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 1.125 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 2.625 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.125 INCHES SECOND END IN |
| Nominal Outside Diameter | 2.625 INCHES FIRST END IN |
| Material | COPPER ALLOY OVERALL |
| Reducer Type | CONCENTRIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 58893-4218 | Tld Ace Corp Div Tld Ace (USA) |
| W1370 PRIMARY | Mueller Brass Co. (USA) |
| Reference | Meaning |
|---|---|
| 58893-0000 | D/9 Drawing number reference only Tld Ace Corp Div Tld Ace |
NSN 4730-01-425-2903 is a Reducer,tube, manufactured by Mueller Brass Co., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-425-2903 has 2 manufacturer part numbers on file: 58893-4218 (Tld Ace Corp Div Tld Ace), W1370 (Mueller Brass Co.).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-425-2904. Verify interchangeability with system specifications before substitution.
Key specifications for W1370: Connection Style: PLAIN (TUBE) ALL ENDS; Nominal Overall Length: 3.250 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 1.125 INCHES SECOND END IN. 9 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.
NSN 4730-01-425-2903 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.