PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3389Adapter,straight,pipe to Boss

Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng · NSN 4730-00-821-1218 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-821-1218 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-821-1218. Primary manufacturer part number: 3389.
Features
  • Adapter,straight,pipe to Boss — FSC 4730
  • Nominal Thread Size: 0.250 INCHES FIRST END IN
  • Nominal Thread Size: 0.562 INCHES SECOND END IN
  • Material: COPPER ALLOY OVERALL
  • Nominal Overall Length: 1.250 INCHES IN
  • Connection Type: THREADED EXTERNAL BOSS SECOND END
  • Connection Style: PLAIN (PIPE) FIRST END
  • Connection Type: THREADED EXTERNAL PIPE FIRST END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-00-821-1218, 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 Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-821-1218
Primary Part Number3389
Item NameAdapter,straight,pipe to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerEsab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng
StatusACTIVE
Nominal Thread Size0.250 INCHES FIRST END IN
Nominal Thread Size0.562 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Nominal Overall Length1.250 INCHES IN
Connection TypeTHREADED EXTERNAL BOSS SECOND END
Connection StylePLAIN (PIPE) FIRST END
Connection TypeTHREADED EXTERNAL PIPE FIRST END
Thread Series DesignatorNPT FIRST END
Thread Series DesignatorUNF SECOND END
Connection StyleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
Thread Class3A SECOND END A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5950-00-057-381310106122 INTERCHANGEABLE
Transformer,power
Us Army Aviation and Missile Command
6240-00-155-7949 INTERCHANGEABLE
Lamp,incandescent
5305-00-392-2074125141 INTERCHANGEABLE
Screw,machine
Telemechanics Inc
5365-00-834-51903389 INTERCHANGEABLE
Plug,machine Thread
Husco International Inc
5340-00-975-80903389 INTERCHANGEABLE
Caster,rigid
Albion Industries, Inc.
5950-00-991-11623389 INTERCHANGEABLE
Coil,radio Frequency
The Bechdon Company, Llc
5905-01-068-78923389 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Bourns Inc
5905-01-123-78364610-00-1105 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Wavetek Rf Products, Inc
4130-01-195-2158 INTERCHANGEABLE
Receiver,liquid Refrigerant
5365-01-398-6484NAS43DD1-13N INTERCHANGEABLE
Spacer,sleeve
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
3389 L-Tec Welding and Cutting Systems (USA)
3389 PRIMARY Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng (USA)
Related Parts
5950-00-057-3813INTERCHANGEABLE
TRANSFORMER,POWER
10106122
6240-00-155-7949INTERCHANGEABLE
LAMP,INCANDESCENT
5305-00-392-2074INTERCHANGEABLE
SCREW,MACHINE
125141
5365-00-834-5190INTERCHANGEABLE
PLUG,MACHINE THREAD
3389
5340-00-975-8090INTERCHANGEABLE
CASTER,RIGID
3389
5950-00-991-1162INTERCHANGEABLE
COIL,RADIO FREQUENCY
3389
5905-01-068-7892INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
3389
5905-01-123-7836INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
4610-00-1105
4130-01-195-2158INTERCHANGEABLE
RECEIVER,LIQUID REFRIGERANT
5365-01-398-6484INTERCHANGEABLE
SPACER,SLEEVE
NAS43DD1-13N
5995-01-491-0727INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E

Frequently Asked Questions

What is NSN 4730-00-821-1218?

NSN 4730-00-821-1218 is a Adapter,straight,pipe to Boss, manufactured by Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-821-1218?

NSN 4730-00-821-1218 has 2 cross-referenced part numbers: 3389 (L-Tec Welding and Cutting Systems), 3389 (Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng).

What NSN replaces 4730-00-821-1218?

There are 11 known substitutes for 4730-00-821-1218: 5950-00-057-3813, 6240-00-155-7949, 5305-00-392-2074 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3389?

Key specifications for 3389: Nominal Thread Size: 0.250 INCHES FIRST END IN; Nominal Thread Size: 0.562 INCHES SECOND END IN; Material: COPPER ALLOY OVERALL; Nominal Overall Length: 1.250 INCHES IN. 11 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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