4730-01-129-9351 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Tailpiece,union — FSC 4730
Criticality Code Justification: ZZZY
Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Identification
NSN: 4730-01-129-9351
NIIN: 011299351
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 4730-01-129-9351, 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 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL F — Mutilate — Cut
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
Y
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-287-3318POSSIBLE MATCH
THREAD PIECE,UNION
Possible match (shared part number)
4730-01-287-9690POSSIBLE MATCH
UNION,PIPE
Possible match (shared part number)
4730-01-360-9393POSSIBLE MATCH
NUT,UNION
Possible match (shared part number)
4730-01-683-8051820-1385990-125-9POSSIBLE MATCH
TAILPIECE,UNION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-683-8067820-1385990ASSY-124-32X-5POSSIBLE MATCH
TAILPIECE,UNION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
820-1385990
3/1Design control — primary reference
U.S. Government activity
MIL-F-23509 CL4
5/1Secondary reference
U.S. Government activity
Related Parts
4730-01-287-3318POSSIBLE MATCH
THREAD PIECE,UNION
4730-01-287-9690POSSIBLE MATCH
UNION,PIPE
4730-01-360-9393POSSIBLE MATCH
NUT,UNION
4730-01-683-8051POSSIBLE MATCH
TAILPIECE,UNION
820-1385990-125-9
4730-01-683-8067POSSIBLE MATCH
TAILPIECE,UNION
820-1385990ASSY-124-32X-5
Frequently Asked Questions
What is NSN 4730-01-129-9351?
NSN 4730-01-129-9351 is a Tailpiece,union, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What NSN replaces 4730-01-129-9351?
5 possible matches (shared part number, not a government interchangeability claim): 4730-01-287-3318, 4730-01-287-9690, 4730-01-360-9393. Verify interchangeability with system specifications before substitution.
What are the specifications of 4730-01-129-9351?
Key specifications for 4730-01-129-9351: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-129-9351 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.
What is the DEMIL code for NSN 4730-01-129-9351?
NSN 4730-01-129-9351 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.