NSN 4730-00-021-4173 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-021-4173. Manufacturer of record part number: W1739.
Also searched as4730-00-021-4173 ·
4730000214173 ·
NIIN 000214173 ·
00-021-4173 ·
FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 41947 · W1739 · 9975792-14
4730-00-021-4173 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Reducer,tube — FSC 4730
Connection Style: PLAIN (TUBE) SECOND END
Connection Style: SOCKET (TUBE) FIRST END
Nominal Overall Length: 0.968 INCHES IN
Nominal Outside Diameter Tube Accommodated: 1.125 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated: 0.625 INCHES FIRST END IN
Material: COPPER ALLOY OVERALL
Reducer Type: CONCENTRIC
Identification
NSN: 4730-00-021-4173
NIIN: 000214173
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
Primary part number: W1739
Manufacturer: Mueller Brass Co.
General Description
The Reducer,tube, cataloged under National Stock Number 4730-00-021-4173, 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 7 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. Current acquisition status: Active.
Other items in FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895
4730-00-000-1895 · Item name not on file
4730-00-000-4289
4730-00-000-4289 · Item name not on file
4730-00-000-4445
4730-00-000-4445 · Item name not on file
4730-00-000-8373
4730-00-000-8373 · Item name not on file
4730-00-000-8897
4730-00-000-8897 · Item name not on file
4730-00-001-0007
4730-00-001-0007 · Item name not on file
4730-00-001-0008
COUPLING,TUBE
4730-00-001-0008
COUPLING,TUBE
Frequently Asked Questions
What is NSN 4730-00-021-4173?
NSN 4730-00-021-4173 is a Reducer,tube, manufactured by Mueller Brass Co., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What part numbers are listed for NSN 4730-00-021-4173?
NSN 4730-00-021-4173 has 2 manufacturer part numbers on file: W1739 (Mueller Brass Co.), 9975792-14 (Us Army Aviation and Missile Command).
What are the specifications of W1739?
Key specifications for W1739: Connection Style: PLAIN (TUBE) SECOND END; Connection Style: SOCKET (TUBE) FIRST END; Nominal Overall Length: 0.968 INCHES IN; Nominal Outside Diameter Tube Accommodated: 1.125 INCHES SECOND END IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4730-00-021-4173 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.