PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A122Plug,tube Fitting,threaded

Mueller Brass Co. · NSN 4730-00-820-6204 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-820-6204 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-820-6204. Primary manufacturer part number: A122.
Features
  • Plug,tube Fitting,threaded — FSC 4730
  • Media for Which Designed: GAS, NATURAL
  • Seat Angle: 45.0 DEGREES
  • Material: COPPER ALLOY OVERALL
  • Thread Series Designator: UNF EXTERNAL
  • Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Style Designator: PLUG, TUBE FITTING FLARED (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
  • Connection Style: PLAIN
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 4730-00-820-6204, 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 Mueller Brass Co.. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-820-6204
Primary Part NumberA122
Item NamePlug,tube Fitting,threaded
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusACTIVE
Media for Which DesignedGAS, NATURAL
Seat Angle45.0 DEGREES
MaterialCOPPER ALLOY OVERALL
Thread Series DesignatorUNF EXTERNAL
Operating Pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Style DesignatorPLUG, TUBE FITTING FLARED (NOTE: DRILLED HOLE IS OPTIONAL, SHOULD NOT BE CONSIDERED AS A SEPARATING CHARACTERISTIC)
Connection StylePLAIN
Thread DirectionRIGHT-HAND EXTERNAL
Thread Class2A EXTERNAL A
Head Height0.250 INCHES NOMINAL IN
Nominal Thread Size0.625 INCHES EXTERNAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-07693383 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
3110-00-100-6150 INTERCHANGEABLE
Ball,bearing
3455-00-228-523841011 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
5945-00-232-397405006200 INTERCHANGEABLE
Relay,electromagnetic
Thales Components Corp Div Thales Components Corporation
5331-00-251-8839MS28778-12 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5340-00-287-7536A-122 INTERCHANGEABLE
Plug Assembly
Essex Industries, Inc. Dba Essex Industries
5920-00-322-2122SM-D-2015983 INTERCHANGEABLE
Arrester,lightning
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6110-00-468-22963383 INTERCHANGEABLE
Controller,motor
Eaton Corp Opns & Technical Center
5950-00-494-4935278-2129-040 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
7690-00-584-4698 INTERCHANGEABLE
Decal
Cross-Reference Index
Part NumberManufacturer
A122 PRIMARY Mueller Brass Co. (USA)
639F3-8 Imperial (USA)
639-F-6 PRIMARY Parker-Hannifin Corp Div Fluid System Connector Division (USA)
3383 Alter Harry Co the Div of T E C (USA)
Related Parts
3110-00-100-0769INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
3383
3110-00-100-6150INTERCHANGEABLE
BALL,BEARING
3455-00-228-5238INTERCHANGEABLE
CUTTER,MILLING,END
41011
5945-00-232-3974INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
05006200
5331-00-251-8839INTERCHANGEABLE
O-RING
MS28778-12
5340-00-287-7536INTERCHANGEABLE
PLUG ASSEMBLY
A-122
5920-00-322-2122INTERCHANGEABLE
ARRESTER,LIGHTNING
SM-D-2015983
6110-00-468-2296INTERCHANGEABLE
CONTROLLER,MOTOR
3383
5950-00-494-4935INTERCHANGEABLE
COIL,RADIO FREQUENCY
278-2129-040
7690-00-584-4698INTERCHANGEABLE
DECAL
3040-00-710-0724INTERCHANGEABLE
SHAFT,STRAIGHT
A1-22
2510-00-752-1742INTERCHANGEABLE
ALIGNMENT CLIP,LEAF SPRING
7521742

Frequently Asked Questions

What is NSN 4730-00-820-6204?

NSN 4730-00-820-6204 is a Plug,tube Fitting,threaded, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-820-6204?

NSN 4730-00-820-6204 has 4 cross-referenced part numbers: A122 (Mueller Brass Co.), 639F3-8 (Imperial), 639-F-6 (Parker-Hannifin Corp Div Fluid System Connector Division), 3383 (Alter Harry Co the Div of T E C).

What NSN replaces 4730-00-820-6204?

There are 12 known substitutes for 4730-00-820-6204: 3110-00-100-0769, 3110-00-100-6150, 3455-00-228-5238 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A122?

Key specifications for A122: Overall Length: 0.875 INCHES NOMINAL IN; Media for Which Designed: GAS, NATURAL; Seat Angle: 45.0 DEGREES; Material: COPPER ALLOY OVERALL. 12 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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