PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121-BPlug,tube Fitting,threaded

Fairview Fitting & Manufacturing, Inc. · NSN 4730-01-597-5851 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-597-5851 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-597-5851. Primary manufacturer part number: 121-B.
Features
  • Plug,tube Fitting,threaded — FSC 4730
  • Connection Style: COMPRESSION
  • Flange Diameter: 0.250 INCHES NOMINAL IN
  • Style Designator: PLUG, MACHINE
  • Material: COPPER ALLOY OVERALL
  • 1 verified cross-reference
  • Primary manufacturer: Fairview Fitting & Manufacturing, Inc.
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Plug,tube Fitting,threaded, cataloged under National Stock Number 4730-01-597-5851, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Fairview Fitting & Manufacturing, Inc.. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-597-5851
Primary Part Number121-B
Item NamePlug,tube Fitting,threaded
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFairview Fitting & Manufacturing, Inc.
StatusACTIVE
Connection StyleCOMPRESSION
Flange Diameter0.250 INCHES NOMINAL IN
Style DesignatorPLUG, MACHINE
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5306-00-362-370721055A INTERCHANGEABLE
Bolt,eccentric Head
Brinkley Technology Group Llc Dba Hercules Manufacturing
5905-00-665-2215121B INTERCHANGEABLE
Resistor,current Regulating
Westinghouse Electric Corp
4720-00-881-3911 INTERCHANGEABLE
Hose Assembly,metallic
6130-01-267-4467121B INTERCHANGEABLE
Power Supply
Ametek Programmable Power, Inc.
Cross-Reference Index
Part NumberManufacturer
121-B PRIMARY Fairview Fitting & Manufacturing, Inc. (USA)
Related Parts
5306-00-362-3707INTERCHANGEABLE
BOLT,ECCENTRIC HEAD
21055A
5905-00-665-2215INTERCHANGEABLE
RESISTOR,CURRENT REGULATING
121B
4720-00-881-3911INTERCHANGEABLE
HOSE ASSEMBLY,METALLIC
6130-01-267-4467INTERCHANGEABLE
POWER SUPPLY
121B

Frequently Asked Questions

What is NSN 4730-01-597-5851?

NSN 4730-01-597-5851 is a Plug,tube Fitting,threaded, manufactured by Fairview Fitting & Manufacturing, Inc., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-597-5851?

NSN 4730-01-597-5851 has 1 cross-referenced part number: 121-B (Fairview Fitting & Manufacturing, Inc.).

What NSN replaces 4730-01-597-5851?

There are 4 known substitutes for 4730-01-597-5851: 5306-00-362-3707, 5905-00-665-2215, 4720-00-881-3911 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 121-B?

Key specifications for 121-B: Part Name Assigned by Controlling Agency: PLUG HEX HEAD, BRASS 1/4 INCH MPT, CORED IN; End Item Identification: 2330-01-538-6359, TRAILER,TANK,WATER,600 GALLON; Connection Style: COMPRESSION; Flange Diameter: 0.250 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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