4730-00-421-7073 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Tailpiece,union — FSC 4730
Union Outside Diameter: 1.750 INCHES NOMINAL IN
End Connection Type: THREADED
Seat Type: BALL
Thread Direction: RIGHT-HAND
Seat Radius: 0.375 INCHES NOMINAL IN
Thread Size: 1/4-18
Screw Thread Series Designator: NPT
Identification
NSN: 4730-00-421-7073
NIIN: 004217073
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description
The Tailpiece,union, cataloged under National Stock Number 4730-00-421-7073, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5915-00-581-2651POSSIBLE MATCH
FILTER,RADIO FREQUENCY INTERFERE
Possible match (shared part number)
5330-00-599-64292002APOSSIBLE MATCH
PACKING,PREFORMED
Possible match (shared part number)Parker Hannifin Corporation Div Aerospace Group Headquarters
6130-01-023-6817POSSIBLE MATCH
POWER SUPPLY ASSEMBLY
Possible match (shared part number)
5330-01-370-8845POSSIBLE MATCH
GASKET
Possible match (shared part number)
5996-01-408-0998POSSIBLE MATCH
AMPLIFIER,AUDIO FREQUENCY
Possible match (shared part number)
5120-01-518-30212002APOSSIBLE MATCH
RIVETER,BLIND,HAND
Possible match (shared part number)Westward Corp
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
2002A
5/9Secondary reference
Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters
2002AB
5/9Secondary reference
U.S. Government activity
2002A
3/2Design control — primary reference
U.S. Government activity
2002AB
5/9Secondary reference
Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters
Related Parts
5915-00-581-2651POSSIBLE MATCH
FILTER,RADIO FREQUENCY INTERFERE
5330-00-599-6429POSSIBLE MATCH
PACKING,PREFORMED
2002A
6130-01-023-6817POSSIBLE MATCH
POWER SUPPLY ASSEMBLY
5330-01-370-8845POSSIBLE MATCH
GASKET
5996-01-408-0998POSSIBLE MATCH
AMPLIFIER,AUDIO FREQUENCY
5120-01-518-3021POSSIBLE MATCH
RIVETER,BLIND,HAND
2002A
Frequently Asked Questions
What is NSN 4730-00-421-7073?
NSN 4730-00-421-7073 is a Tailpiece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-00-421-7073?
6 possible matches (shared part number, not a government interchangeability claim): 5915-00-581-2651, 5330-00-599-6429, 6130-01-023-6817. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-00-421-7073?
Key specifications for 4730-00-421-7073: Union Outside Diameter: 1.750 INCHES NOMINAL IN; End Connection Type: THREADED; Overall Length: 2.438 INCHES NOMINAL IN; Seat Type: BALL. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4730-00-421-7073 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.