PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWP521TYPE1Tee,pipe

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 4730-00-265-9706 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-265-9706 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-265-9706. Primary manufacturer part number: WWP521TYPE1.
Features
  • Tee,pipe — FSC 4730
  • Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
  • Material: IRON OVERALL
  • Thread Series Designator: NPT THIRD END
  • Media for Which Designed: STEAM FIRST RESPONSE
  • Thread Series Designator: NPT SECOND END
  • Nominal Thread Size: 0.375 INCHES FIRST END IN
  • Nominal Thread Size: 0.375 INCHES SECOND END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Overall construction
General Description

The Tee,pipe, cataloged under National Stock Number 4730-00-265-9706, 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 Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 22 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-265-9706
Primary Part NumberWWP521TYPE1
Item NameTee,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Operating Pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
MaterialIRON OVERALL
Thread Series DesignatorNPT THIRD END
Media for Which DesignedSTEAM FIRST RESPONSE
Thread Series DesignatorNPT SECOND END
Nominal Thread Size0.375 INCHES FIRST END IN
Nominal Thread Size0.375 INCHES SECOND END IN
Maximum Operating Temp260.0 CELSIUS FIRST RESPONSE DEGC
Connection StylePLAIN (PIPE) THIRD END
Leg Length0.880 INCHES NOMINAL FIRST END IN
Connection StylePLAIN (PIPE) SECOND END
Connection TypeTHREADED INTERNAL PIPE SECOND END
Nondefinitive Spec/std Data1 TYPE
Connection TypeTHREADED INTERNAL PIPE FIRST END
Connection StylePLAIN (PIPE) FIRST END
Maximum Operating Temp65.6 CELSIUS SECOND RESPONSE DEGC
Thread Series DesignatorNPT FIRST END
Leg Length0.900 INCHES NOMINAL THIRD END IN
Nominal Thread Size0.250 INCHES THIRD END IN
Media for Which DesignedWATER-OIL-GAS SECOND RESPONSE
Operating Pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
Connection TypeTHREADED INTERNAL PIPE THIRD END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-088-8576 INTERCHANGEABLE
Elbow,pipe
4730-00-203-8358 INTERCHANGEABLE
Coupling,pipe
4730-00-231-2410 INTERCHANGEABLE
Cap,pipe
4730-00-246-9188119095 INTERCHANGEABLE
Elbow,pipe
Rolls-Royce Solutions America Inc
4730-00-246-9190 INTERCHANGEABLE
Elbow,pipe
4730-00-246-9218 INTERCHANGEABLE
Elbow,pipe
4730-00-277-1986 INTERCHANGEABLE
Elbow,pipe
4730-00-277-2782 INTERCHANGEABLE
Reducer,pipe
4730-00-277-2863MPD9484-3A1-1 INTERCHANGEABLE
Elbow,pipe
Met-Pro Corporation
4730-00-278-2954218219 INTERCHANGEABLE
Elbow,pipe
General Motors Llc Dba General Motors Llc
Cross-Reference Index
Part NumberManufacturer
WWP521TYPE1 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
X6-6-4RT Ed Etnyre & Co (USA)
Related Parts
4730-00-088-8576INTERCHANGEABLE
ELBOW,PIPE
4730-00-203-8358INTERCHANGEABLE
COUPLING,PIPE
4730-00-231-2410INTERCHANGEABLE
CAP,PIPE
4730-00-246-9188INTERCHANGEABLE
ELBOW,PIPE
119095
4730-00-246-9190INTERCHANGEABLE
ELBOW,PIPE
4730-00-246-9218INTERCHANGEABLE
ELBOW,PIPE
4730-00-277-1986INTERCHANGEABLE
ELBOW,PIPE
4730-00-277-2782INTERCHANGEABLE
REDUCER,PIPE
4730-00-277-2863INTERCHANGEABLE
ELBOW,PIPE
MPD9484-3A1-1
4730-00-278-2954INTERCHANGEABLE
ELBOW,PIPE
218219
4730-00-278-4422INTERCHANGEABLE
TEE,PIPE
4730-01-023-5541INTERCHANGEABLE
REDUCER,PIPE

Frequently Asked Questions

What is NSN 4730-00-265-9706?

NSN 4730-00-265-9706 is a Tee,pipe, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-265-9706?

NSN 4730-00-265-9706 has 2 cross-referenced part numbers: WWP521TYPE1 (Federal Specifications Promulgated by General Services Administration Washington DC), X6-6-4RT (Ed Etnyre & Co).

What NSN replaces 4730-00-265-9706?

There are 12 known substitutes for 4730-00-265-9706: 4730-00-088-8576, 4730-00-203-8358, 4730-00-231-2410 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WWP521TYPE1?

Key specifications for WWP521TYPE1: Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS; Material: IRON OVERALL; Thread Series Designator: NPT THIRD END; Media for Which Designed: STEAM FIRST RESPONSE. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-265-9706 still in active supply?

NSN 4730-00-265-9706 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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