PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WWU536Union,pipe

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 4730-00-294-2677 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-294-2677 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-294-2677. Primary manufacturer part number: WWU536.
Features
  • Union,pipe — FSC 4730
  • Operating Pressure: 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Nominal Thread Size: 3.000 INCHES ALL ENDS3.000 INCHES ALL ENDS IN
  • Style Designator: THREADED
  • Nondefinitive Spec/std Data: XD TYPE
  • Thread Series Designator: NPT ALL ENDS
  • Nominal Overall Length: 4.290 INCHES IN
  • Connection Type: THREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Overall construction
General Description

The Union,pipe, cataloged under National Stock Number 4730-00-294-2677, 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 11 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
NSN4730-00-294-2677
Primary Part NumberWWU536
Item NameUnion,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Operating Pressure600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size3.000 INCHES ALL ENDS3.000 INCHES ALL ENDS IN
Style DesignatorTHREADED
Nondefinitive Spec/std DataXD TYPE
Thread Series DesignatorNPT ALL ENDS
Nominal Overall Length4.290 INCHES IN
Connection TypeTHREADED INTERNAL PIPE ALL ENDSTHREADED INTERNAL PIPE ALL ENDS
MaterialIRON OVERALL
Connection StylePLAIN (PIPE) ALL ENDSPLAIN (PIPE) ALL ENDS
Surface TreatmentZINC OVERALL
Seat TypeBEVELEDBEVELED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-189-2598 INTERCHANGEABLE
Union,pipe
4730-00-189-2599 INTERCHANGEABLE
Union,pipe
4730-00-189-2600 INTERCHANGEABLE
Union,pipe
4730-00-189-26021631-400 INTERCHANGEABLE
Union,pipe
Flaton Machine Works Inc.
4730-00-189-2605 INTERCHANGEABLE
Union,pipe
4730-00-189-2606 INTERCHANGEABLE
Union,pipe
4730-00-189-2629 INTERCHANGEABLE
Union,pipe
4730-00-189-2630 INTERCHANGEABLE
Union,pipe
4730-00-189-2635 INTERCHANGEABLE
Union,pipe
4730-00-189-2638 INTERCHANGEABLE
Union,pipe
Cross-Reference Index
Part NumberManufacturer
WWU536 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MIL-U-18250 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-189-2598INTERCHANGEABLE
UNION,PIPE
4730-00-189-2599INTERCHANGEABLE
UNION,PIPE
4730-00-189-2600INTERCHANGEABLE
UNION,PIPE
4730-00-189-2602INTERCHANGEABLE
UNION,PIPE
1631-400
4730-00-189-2605INTERCHANGEABLE
UNION,PIPE
4730-00-189-2606INTERCHANGEABLE
UNION,PIPE
4730-00-189-2629INTERCHANGEABLE
UNION,PIPE
4730-00-189-2630INTERCHANGEABLE
UNION,PIPE
4730-00-189-2635INTERCHANGEABLE
UNION,PIPE
4730-00-189-2638INTERCHANGEABLE
UNION,PIPE
4730-00-189-2639INTERCHANGEABLE
UNION,PIPE
4730-00-189-2645INTERCHANGEABLE
UNION,PIPE

Frequently Asked Questions

What is NSN 4730-00-294-2677?

NSN 4730-00-294-2677 is a Union,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 4730-00-294-2677?

NSN 4730-00-294-2677 has 2 cross-referenced part numbers: WWU536 (Federal Specifications Promulgated by General Services Administration Washington DC), MIL-U-18250 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-00-294-2677?

There are 12 known substitutes for 4730-00-294-2677: 4730-00-189-2598, 4730-00-189-2599, 4730-00-189-2600 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WWU536?

Key specifications for WWU536: Operating Pressure: 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Nominal Thread Size: 3.000 INCHES ALL ENDS3.000 INCHES ALL ENDS IN; Style Designator: THREADED; Nondefinitive Spec/std Data: XD TYPE. 11 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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