PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A8073Adapter,straight,pipe to Tube

Mueller Brass Co. · NSN 4730-00-826-4278 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-826-4278 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-826-4278. Primary manufacturer part number: A8073.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Material: COPPER ALLOY OVERALL
  • Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN
  • Thread Series Designator: NPT SECOND END
  • Nominal Thread Size: 0.750 INCHES SECOND END IN
  • Thread Series Designator: UNF FIRST END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-826-4278, 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 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-826-4278
Primary Part NumberA8073
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMueller Brass Co.
StatusCANCELLED
Nominal Thread Size0.438 INCHES FIRST END IN
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
MaterialCOPPER ALLOY OVERALL
Nominal Pipe Size Accommodated0.750 INCHES SECOND END IN
Thread Series DesignatorNPT SECOND END
Nominal Thread Size0.750 INCHES SECOND END IN
Thread Series DesignatorUNF FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Seat Angle45.0 DEGREES FIRST END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Connection StyleFLARED (TUBE) FIRST END
Connection StylePLAIN (PIPE) SECOND END
Nominal Overall Length1.125 INCHES IN
Thread Class2A FIRST END A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-208-3569 INTERCHANGEABLE
Setscrew
5960-00-230-5228 INTERCHANGEABLE
Electron Tube
5950-00-256-1360SMC619632 INTERCHANGEABLE
Transformer,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3040-00-277-2092 INTERCHANGEABLE
Brake Drum
5961-00-284-5995 INTERCHANGEABLE
Semiconductor Device,diode
5310-00-540-7666R406PC14 INTERCHANGEABLE
Washer,flat
Circor Naval Solutions Llc Dba Warren Pumps
2920-00-654-8141 INTERCHANGEABLE
Regulator,engine Generator
5325-00-732-06867320686 INTERCHANGEABLE
Grommet,nonmetallic
U S Army Tank Automotive Command Amsta-Im-Mm
3040-00-757-9290K1-1 INTERCHANGEABLE
Hub,body
Roller Bearing Co of America, Inc Div Pic Design
4320-00-759-55395639 INTERCHANGEABLE
Wrench,impeller
Coffin Turbo Pump Inc
Cross-Reference Index
Part NumberManufacturer
A0873 Keco Industries, Inc. (USA)
A8073 PRIMARY Mueller Brass Co. (USA)
5639 Alter Harry Co the Div of T E C (USA)
K1-1 Imperial (USA)
K1-1 Superior Valve Co (USA)
MIL-F-15049 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5305-00-208-3569INTERCHANGEABLE
SETSCREW
5960-00-230-5228INTERCHANGEABLE
ELECTRON TUBE
5950-00-256-1360INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
SMC619632
3040-00-277-2092INTERCHANGEABLE
BRAKE DRUM
5961-00-284-5995INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5310-00-540-7666INTERCHANGEABLE
WASHER,FLAT
R406PC14
2920-00-654-8141INTERCHANGEABLE
REGULATOR,ENGINE GENERATOR
5325-00-732-0686INTERCHANGEABLE
GROMMET,NONMETALLIC
7320686
3040-00-757-9290INTERCHANGEABLE
HUB,BODY
K1-1
4320-00-759-5539INTERCHANGEABLE
WRENCH,IMPELLER
5639
7640-01-107-1790INTERCHANGEABLE
BALANCE CHART
5639
6625-01-134-4812INTERCHANGEABLE
BALL
5-639

Frequently Asked Questions

What is NSN 4730-00-826-4278?

NSN 4730-00-826-4278 is a Adapter,straight,pipe to Tube, manufactured by Mueller Brass Co., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-826-4278?

NSN 4730-00-826-4278 has 6 cross-referenced part numbers: A0873 (Keco Industries, Inc.), A8073 (Mueller Brass Co.), 5639 (Alter Harry Co the Div of T E C), K1-1 (Imperial), K1-1 (Superior Valve Co) and 1 more.

What NSN replaces 4730-00-826-4278?

There are 12 known substitutes for 4730-00-826-4278: 5305-00-208-3569, 5960-00-230-5228, 5950-00-256-1360 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A8073?

Key specifications for A8073: Nominal Thread Size: 0.438 INCHES FIRST END IN; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Material: COPPER ALLOY OVERALL; Nominal Pipe Size Accommodated: 0.750 INCHES SECOND END IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-826-4278 still in active supply?

NSN 4730-00-826-4278 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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