NSN 4730-01-491-9890 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-491-9890. Manufacturer of record part number: 6402-20-20-O.
Also searched as4730-01-491-9890 ·
4730014919890 ·
NIIN 014919890 ·
01-491-9890 ·
FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 5E240 · 6402-20-20-O
Nearby stock numbers← 4730-01-491-9650 Adapter, Straight, Tube to Boss
·
4730-01-491-9912 Coupling Half, Quick Disconnect →
4730-01-491-9890 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Adapter,straight,tube to Boss — FSC 4730
Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
Nominal Overall Length: 2.415 INCHES IN
Connection Type: THREADED EXTERNAL BOSS SECOND END
Connection Type: THREADED INTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated: 1.250 INCHES FIRST END IN
Nominal Thread Size: 1.625 INCHES SECOND END IN
Identification
NSN: 4730-01-491-9890
NIIN: 014919890
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
Primary part number: 6402-20-20-O
Manufacturer: Brennan Industries
General Description
The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-491-9890, 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 Brennan Industries. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 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 4730-01-491-9890?
NSN 4730-01-491-9890 is a Adapter,straight,tube to Boss, manufactured by Brennan Industries, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What part numbers are listed for NSN 4730-01-491-9890?
NSN 4730-01-491-9890 has 1 manufacturer part number on file: 6402-20-20-O (Brennan Industries).
What are the specifications of 6402-20-20-O?
Key specifications for 6402-20-20-O: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END; Nominal Overall Length: 2.415 INCHES IN; Connection Type: THREADED EXTERNAL BOSS SECOND END. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-491-9890 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.