PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MPD9576-55-49Adapter,straight,pipe to Tube

Met-Pro Corporation · NSN 4730-00-266-0531 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-266-0531 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-266-0531. Primary manufacturer part number: MPD9576-55-49.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.375 INCHES FIRST END IN
  • Nominal Outside Diameter Tube Accommodated: 0.188 INCHES FIRST END IN
  • Material: COPPER ALLOY 11 OR COPPER ALLOY 360 OVERALL
  • Connection Style: FLARED (TUBE) FIRST END
  • Thread Series Designator: NPTF SECOND END
  • Nondefinitive Spec/std Data: 1A FIGURE A
  • Nominal Thread Size: 0.125 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy 11 or Copper Alloy 360 Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-266-0531, 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 Met-Pro Corporation. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 31 commercial cross-references from 21 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
NSN4730-00-266-0531
Primary Part NumberMPD9576-55-49
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMet-Pro Corporation
StatusCANCELLED
Nominal Thread Size0.375 INCHES FIRST END IN
Nominal Outside Diameter Tube Accommodated0.188 INCHES FIRST END IN
MaterialCOPPER ALLOY 11 OR COPPER ALLOY 360 OVERALL
Connection StyleFLARED (TUBE) FIRST END
Thread Series DesignatorNPTF SECOND END
Nondefinitive Spec/std Data1A FIGURE A
Nominal Thread Size0.125 INCHES SECOND END IN
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Thread Class2A FIRST END A
Connection StylePLAIN (PIPE) SECOND END
Material Document and ClassificationQQ-B-613,COMP 11 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626,COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nominal Overall Length0.980 INCHES IN
Thread Series DesignatorUNF FIRST END
Maximum Operating Temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
Specification/standard Data81343-J512 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS39158 GOVERNMENT STANDARD
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Seat Angle45.0 DEGREES FIRST END
Operating Pressure1900.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3120-00-113-1538FF310 INTERCHANGEABLE
Bearing,sleeve
Chrysler Corp Amplex Div
5950-00-113-3601050-002136 INTERCHANGEABLE
Transformer,radio Frequency
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5940-00-159-125212Z7001-2091 INTERCHANGEABLE
Terminal,lug
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4730-00-200-048432158-35 INTERCHANGEABLE
Packing Nut
Solventum Purification Inc. Div Filtration and Separation Division
5365-00-473-4736343103 INTERCHANGEABLE
Plug,machine Thread
Eaton Aerospace, Llc Dba Jackson South
5120-00-596-0847 INTERCHANGEABLE
Socket,socket Wrench
5910-00-864-3266 INTERCHANGEABLE
Capacitor
5340-01-117-3735F3-10 INTERCHANGEABLE
Standoff,threaded,spacing
Roller Bearing Co of America, Inc Div Pic Design
5977-01-214-1129300819-1 INTERCHANGEABLE
Base,block
Moog Inc.
4530-01-381-3369 INTERCHANGEABLE
Head,combustion
Cross-Reference Index
Part NumberManufacturer
X1806T69 Siemens Energy, Inc. Dba Dresser-Rand (USA)
F310 Eaton Corp Controls Div (USA)
648F3-16X1-8IN Imperial (USA)
001-200003 Dana Corp Weatherhead Div (USA)
W48X3 Dana Corp Weatherhead Div (USA)
45F489 Department of the Navy (USA)
MPD9576-55-49 PRIMARY Met-Pro Corporation (USA)
45F489 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
4730PL0921224 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS39158-2 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
25B48F PRIMARY Fwd Seagrave Holdings Lp (USA)
X1806T69 Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA)
J5123-2010102B Society of Automotive Engineers Inc (USA)
X1806T69 Ingersoll Rand Co (USA)
X1806T69 Dresser-Rand Co Ingersoll-Rand Opns a Joint Venture (USA)
48F-3-2 Parker-Hannifin Corp Div Fluid System Connector Division (USA)
502-136 Cummins Power Generation Inc. (USA)
J512 Society of Automotive Engineers Inc (USA)
45U1607-350 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
48X3 Dana Corp Weatherhead Div (USA)
Related Parts
3120-00-113-1538INTERCHANGEABLE
BEARING,SLEEVE
FF310
5950-00-113-3601INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
050-002136
5940-00-159-1252INTERCHANGEABLE
TERMINAL,LUG
12Z7001-2091
4730-00-200-0484INTERCHANGEABLE
PACKING NUT
32158-35
5365-00-473-4736INTERCHANGEABLE
PLUG,MACHINE THREAD
343103
5120-00-596-0847INTERCHANGEABLE
SOCKET,SOCKET WRENCH
5910-00-864-3266INTERCHANGEABLE
CAPACITOR
5340-01-117-3735INTERCHANGEABLE
STANDOFF,THREADED,SPACING
F3-10
5977-01-214-1129INTERCHANGEABLE
BASE,BLOCK
300819-1
4530-01-381-3369INTERCHANGEABLE
HEAD,COMBUSTION
5950-01-395-2503INTERCHANGEABLE
TRANSFORMER,POWER
F3-10
5120-01-661-6704INTERCHANGEABLE
SOCKET,SOCKET WRENCH
F310

Frequently Asked Questions

What is NSN 4730-00-266-0531?

NSN 4730-00-266-0531 is a Adapter,straight,pipe to Tube, manufactured by Met-Pro Corporation, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-266-0531?

NSN 4730-00-266-0531 has 31 cross-referenced part numbers: X1806T69 (Siemens Energy, Inc. Dba Dresser-Rand), F310 (Eaton Corp Controls Div), 648F3-16X1-8IN (Imperial), 001-200003 (Dana Corp Weatherhead Div), W48X3 (Dana Corp Weatherhead Div) and 26 more.

What NSN replaces 4730-00-266-0531?

There are 12 known substitutes for 4730-00-266-0531: 3120-00-113-1538, 5950-00-113-3601, 5940-00-159-1252 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MPD9576-55-49?

Key specifications for MPD9576-55-49: Nominal Thread Size: 0.375 INCHES FIRST END IN; Nominal Outside Diameter Tube Accommodated: 0.188 INCHES FIRST END IN; Material: COPPER ALLOY 11 OR COPPER ALLOY 360 OVERALL; Connection Style: FLARED (TUBE) FIRST END. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-266-0531 still in active supply?

NSN 4730-00-266-0531 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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