PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWP521Reducer,pipe

Noland Company Dba Winsupply Manassas VA Co. · NSN 4730-00-231-5661 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-231-5661 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-231-5661. Primary manufacturer part number: WWP521.
Features
  • Reducer,pipe — FSC 4730
  • Connection Type: THREADED INTERNAL PIPE ALL ENDS
  • Nominal Thread Size: 1.500 INCHES FIRST END IN
  • Nominal Thread Size: 0.750 INCHES SECOND END IN
  • Maximum Operating Temp: 260.0 CELSIUS FIRST RESPONSE DEGC
  • Maximum Operating Temp: 65.6 CELSIUS SECOND RESPONSE DEGC
  • Connection Style: PLAIN (PIPE) ALL ENDS
  • Media for Which Designed: STEAM FIRST RESPONSE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Malleable Overall construction
General Description

The Reducer,pipe, cataloged under National Stock Number 4730-00-231-5661, 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 Noland Company Dba Winsupply Manassas VA Co.. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 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
NSN4730-00-231-5661
Primary Part NumberWWP521
Item NameReducer,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerNoland Company Dba Winsupply Manassas VA Co.
StatusCANCELLED
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Nominal Thread Size1.500 INCHES FIRST END IN
Nominal Thread Size0.750 INCHES SECOND END IN
Maximum Operating Temp260.0 CELSIUS FIRST RESPONSE DEGC
Maximum Operating Temp65.6 CELSIUS SECOND RESPONSE DEGC
Connection StylePLAIN (PIPE) ALL ENDS
Media for Which DesignedSTEAM FIRST RESPONSE
Surface TreatmentZINC OVERALL
Surface Treatment Document and ClassificationQQ-Z-325,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Media for Which DesignedWATER-OIL-GAS SECOND RESPONSE
Material Document and ClassificationASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialIRON MALLEABLE OVERALL
Operating Pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Overall Length2.310 INCHES IN
Nondefinitive Spec/std Data1 TABLE AND 2 TYPE
Specification/standard Data81348-WW-P-521 GOVERNMENT SPECIFICATION AND 96906-MS39232 GOVERNMENT STANDARD
Thread Series DesignatorNPT ALL ENDS
Reducer TypeCONCENTRIC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-231-5654 INTERCHANGEABLE
Reducer,pipe
4730-00-231-5657 INTERCHANGEABLE
Reducer,pipe
4730-00-247-0923 INTERCHANGEABLE
Lateral,pipe
4730-00-253-4414 INTERCHANGEABLE
Elbow,pipe
4730-00-253-4420 INTERCHANGEABLE
Elbow,pipe
4730-00-253-4421 INTERCHANGEABLE
Elbow,pipe
4730-00-255-8253 INTERCHANGEABLE
Cross,pipe
4730-00-255-8254221-1502 INTERCHANGEABLE
Cross,pipe
Stealth Supply, Inc.
4730-00-257-2123 INTERCHANGEABLE
Tee,pipe
4730-00-261-4218 INTERCHANGEABLE
Elbow,pipe
Cross-Reference Index
Part NumberManufacturer
WWP521 Noland Company Dba Winsupply Manassas VA Co. (USA)
7534 Victaulic Company of America Inc Dba Victaulic Company of America (USA)
MS39232-15 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
WWP521 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
ASME B16.3 The American Society of Mechanical Engineers (USA)
WWP521TYPE2 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
WWP521 Mindeco Corp (USA)
Related Parts
4730-00-231-5654INTERCHANGEABLE
REDUCER,PIPE
4730-00-231-5657INTERCHANGEABLE
REDUCER,PIPE
4730-00-247-0923INTERCHANGEABLE
LATERAL,PIPE
4730-00-253-4414INTERCHANGEABLE
ELBOW,PIPE
4730-00-253-4420INTERCHANGEABLE
ELBOW,PIPE
4730-00-253-4421INTERCHANGEABLE
ELBOW,PIPE
4730-00-255-8253INTERCHANGEABLE
CROSS,PIPE
4730-00-255-8254INTERCHANGEABLE
CROSS,PIPE
221-1502
4730-00-257-2123INTERCHANGEABLE
TEE,PIPE
4730-00-261-4218INTERCHANGEABLE
ELBOW,PIPE
4730-00-277-5639INTERCHANGEABLE
ELBOW,PIPE
4730-00-277-5644INTERCHANGEABLE
ELBOW,PIPE
FIG 601 2 1/2INCH,GALVANIZED

Frequently Asked Questions

What is NSN 4730-00-231-5661?

NSN 4730-00-231-5661 is a Reducer,pipe, manufactured by Noland Company Dba Winsupply Manassas VA Co., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-231-5661?

NSN 4730-00-231-5661 has 7 cross-referenced part numbers: WWP521 (Noland Company Dba Winsupply Manassas VA Co.), 7534 (Victaulic Company of America Inc Dba Victaulic Company of America), MS39232-15 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), WWP521 (Federal Specifications Promulgated by General Services Administration Washington DC), ASME B16.3 (The American Society of Mechanical Engineers) and 2 more.

What NSN replaces 4730-00-231-5661?

There are 12 known substitutes for 4730-00-231-5661: 4730-00-231-5654, 4730-00-231-5657, 4730-00-247-0923 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WWP521?

Key specifications for WWP521: Connection Type: THREADED INTERNAL PIPE ALL ENDS; Nominal Thread Size: 1.500 INCHES FIRST END IN; Nominal Thread Size: 0.750 INCHES SECOND END IN; Maximum Operating Temp: 260.0 CELSIUS FIRST RESPONSE DEGC. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-231-5661 still in active supply?

NSN 4730-00-231-5661 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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