PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWP521Cap,pipe

Allied Plumbing Sales Co Inc · NSN 4730-00-231-2416 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-231-2416 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-231-2416. Primary manufacturer part number: WWP521.
Features
  • Cap,pipe — FSC 4730
  • Style Designator: CAP
  • Nominal Pipe Size for Which Designed: 2.000 INCHES IN
  • Material Document and Classification: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A234 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: IRON OR STEEL OVERALL
  • Thread Series Designator: NPT INTERNAL
  • Nominal Thread Size: 2.000 INCHES INTERNAL IN
  • Thread Direction: RIGHT-HAND INTERNAL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron or Steel Overall construction
General Description

The Cap,pipe, cataloged under National Stock Number 4730-00-231-2416, 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 Allied Plumbing Sales Co Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 8 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
NSN4730-00-231-2416
Primary Part NumberWWP521
Item NameCap,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAllied Plumbing Sales Co Inc
StatusCANCELLED
Style DesignatorCAP
Nominal Pipe Size for Which Designed2.000 INCHES IN
Material Document and ClassificationASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A234 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialIRON OR STEEL OVERALL
Thread Series DesignatorNPT INTERNAL
Nominal Thread Size2.000 INCHES INTERNAL IN
Thread DirectionRIGHT-HAND INTERNAL
Connection StylePLAIN (OPTIONAL END)
Nondefinitive Spec/std Data1 TYPE
Head TypeSOLID
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-227-6942 INTERCHANGEABLE
Reducer,pipe
4730-00-246-9208 INTERCHANGEABLE
Elbow,pipe
4730-00-249-1519 INTERCHANGEABLE
Elbow,pipe
4920-00-342-4012 INTERCHANGEABLE
Test Set,indicator
5970-00-498-37407138S INTERCHANGEABLE
Insulator,knob
Knox Porcelain Corp
5995-00-690-65291092846G1 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5905-00-935-8542 INTERCHANGEABLE
Resistor,fixed,composition
2920-01-243-631310463072 INTERCHANGEABLE
Generator,engine Accessory
Delco Remy America Inc
5905-01-337-6951796891-3 INTERCHANGEABLE
Resistor Network,fixed,film
Hamilton Sundstrand Corporation Dba Collins Aerospace
5360-01-343-2646SL15019 ITEM 92 INTERCHANGEABLE
Spring,helical,compression
Sss Clutch Co, Inc
Cross-Reference Index
Part NumberManufacturer
WWP521 Allied Plumbing Sales Co Inc (USA)
B16.3 The American Society of Mechanical Engineers (USA)
221-530 Cnh Industrial America Llc Dba Cnh America (USA)
WWP521 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
7138 Walworth Co Marine Div (USA)
22P521 Samuel Levine Plumbing and Heating Supplies, Inc. Div Slphs Inc (USA)
BM11359-01A06 Demarkus Corp Refrigeration Engineering Corp (USA)
BM11623-69 Demarkus Corp Refrigeration Engineering Corp (USA)
5611-60-49 Macleod Inc (USA)
Related Parts
4730-00-227-6942INTERCHANGEABLE
REDUCER,PIPE
4730-00-246-9208INTERCHANGEABLE
ELBOW,PIPE
4730-00-249-1519INTERCHANGEABLE
ELBOW,PIPE
4920-00-342-4012INTERCHANGEABLE
TEST SET,INDICATOR
5970-00-498-3740INTERCHANGEABLE
INSULATOR,KNOB
7138S
5995-00-690-6529INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
1092846G1
5905-00-935-8542INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
2920-01-243-6313INTERCHANGEABLE
GENERATOR,ENGINE ACCESSORY
10463072
5905-01-337-6951INTERCHANGEABLE
RESISTOR NETWORK,FIXED,FILM
796891-3
5360-01-343-2646INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
SL15019 ITEM 92
6550-01-559-3732INTERCHANGEABLE
CULTURE MEDIUM,HEKTOEN ENTERIC A
7138A
5995-01-564-0710INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
221530

Frequently Asked Questions

What is NSN 4730-00-231-2416?

NSN 4730-00-231-2416 is a Cap,pipe, manufactured by Allied Plumbing Sales Co Inc, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-231-2416?

NSN 4730-00-231-2416 has 9 cross-referenced part numbers: WWP521 (Allied Plumbing Sales Co Inc), B16.3 (The American Society of Mechanical Engineers), 221-530 (Cnh Industrial America Llc Dba Cnh America), WWP521 (Federal Specifications Promulgated by General Services Administration Washington DC), 7138 (Walworth Co Marine Div) and 4 more.

What NSN replaces 4730-00-231-2416?

There are 12 known substitutes for 4730-00-231-2416: 4730-00-227-6942, 4730-00-246-9208, 4730-00-249-1519 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WWP521?

Key specifications for WWP521: Style Designator: CAP; Nominal Pipe Size for Which Designed: 2.000 INCHES IN; Material Document and Classification: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A234 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: IRON OR STEEL OVERALL. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-231-2416 still in active supply?

NSN 4730-00-231-2416 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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