NSN 4730-01-439-9891 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-439-9891. Manufacturer of record part number: CSTBU-4A.
Also searched as4730-01-439-9891 ·
4730014399891 ·
NIIN 014399891 ·
01-439-9891 ·
FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 74965 · CSTBU-4A
The Trap,steam, cataloged under National Stock Number 4730-01-439-9891, 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 Clark-Reliance Llc Dba Jerguson Gage & Valve. The record lists 1 manufacturer part number 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 4730-01-439-9891?
NSN 4730-01-439-9891 is a Trap,steam, manufactured by Clark-Reliance Llc Dba Jerguson Gage & Valve, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What part numbers are listed for NSN 4730-01-439-9891?
NSN 4730-01-439-9891 has 1 manufacturer part number on file: CSTBU-4A (Clark-Reliance Llc Dba Jerguson Gage & Valve).
What are the specifications of CSTBU-4A?
Key specifications for CSTBU-4A: Special Features: NEXT ASSEMBLY STEAM TRAP ASSEMBLY; End Item Identification: MARS CLASS AFS. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-439-9891 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.