PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWP521TYPE1Reducer,pipe

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 4730-00-277-2782 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-277-2782 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-277-2782. Primary manufacturer part number: WWP521TYPE1.
Features
  • Reducer,pipe — FSC 4730
  • Connection Type: THREADED INTERNAL PIPE ALL ENDS
  • Nominal Thread Size: 0.250 INCHES SECOND END IN
  • Connection Style: PLAIN (PIPE) ALL ENDS
  • Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Nominal Thread Size: 1.000 INCHES FIRST END IN
  • Specification/standard Data: 05047-B163 GOVERNMENT SPECIFICATION
  • Nondefinitive Spec/std Data: 1 TYPE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Overall construction
General Description

The Reducer,pipe, cataloged under National Stock Number 4730-00-277-2782, 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 12 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: Active.

Technical Specifications
ParameterValue
NSN4730-00-277-2782
Primary Part NumberWWP521TYPE1
Item NameReducer,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Connection TypeTHREADED INTERNAL PIPE ALL ENDS
Nominal Thread Size0.250 INCHES SECOND END IN
Connection StylePLAIN (PIPE) ALL ENDS
Operating Pressure300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size1.000 INCHES FIRST END IN
Specification/standard Data05047-B163 GOVERNMENT SPECIFICATION
Nondefinitive Spec/std Data1 TYPE
Thread Series DesignatorNPT ALL ENDS
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Nominal Overall Length1.688 INCHES IN
MaterialIRON OVERALL
Reducer TypeCONCENTRIC
Lifecycle & Compliance
Acquisition StatusACTIVE
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
4730-00-265-9706 INTERCHANGEABLE
Tee,pipe
4730-00-277-1986 INTERCHANGEABLE
Elbow,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)
B163 The American Society of Mechanical Engineers (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
4730-00-265-9706INTERCHANGEABLE
TEE,PIPE
4730-00-277-1986INTERCHANGEABLE
ELBOW,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 4730-00-277-2782?

NSN 4730-00-277-2782 is a Reducer,pipe, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-277-2782?

NSN 4730-00-277-2782 has 2 cross-referenced part numbers: WWP521TYPE1 (Federal Specifications Promulgated by General Services Administration Washington DC), B163 (The American Society of Mechanical Engineers).

What NSN replaces 4730-00-277-2782?

There are 12 known substitutes for 4730-00-277-2782: 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: Connection Type: THREADED INTERNAL PIPE ALL ENDS; Nominal Thread Size: 0.250 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) ALL ENDS; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 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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