PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WW-P-491Elbow,drainage Pipe

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 4730-00-277-9703 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-277-9703 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-277-9703. Primary manufacturer part number: WW-P-491.
Features
  • Elbow,drainage Pipe — FSC 4730
  • Specification/standard Data: 96906-MS90522 GOVERNMENT STANDARD
  • Thread Series Designator: NPT ALL ENDS
  • Flow Angle: 90.0 DEGREES
  • Connection Type: THREADED INTERNAL PIPE FIRST END
  • Leg Length: 5.188 INCHES NOMINAL FIRST END IN
  • Nominal Thread Size: 4.000 INCHES ALL ENDS IN
  • Material: IRON OVERALL
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Iron Overall construction
General Description

The Elbow,drainage Pipe, cataloged under National Stock Number 4730-00-277-9703, 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 4 commercial cross-references from 4 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
NSN4730-00-277-9703
Primary Part NumberWW-P-491
Item NameElbow,drainage Pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Specification/standard Data96906-MS90522 GOVERNMENT STANDARD
Thread Series DesignatorNPT ALL ENDS
Flow Angle90.0 DEGREES
Connection TypeTHREADED INTERNAL PIPE FIRST END
Leg Length5.188 INCHES NOMINAL FIRST END IN
Nominal Thread Size4.000 INCHES ALL ENDS IN
MaterialIRON OVERALL
Connection StyleDRAINAGE (PIPE) ALL ENDS
Connection TypeTHREADED INTERNAL PIPE SECOND END
Leg Length5.188 INCHES NOMINAL SECOND END IN
Sweep TypeLONG
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-065-4889378389 INTERCHANGEABLE
Roller,bearing
Parker Hannifin Corporation Div Chelsea Products Division
9540-00-188-6267 INTERCHANGEABLE
Beam,structural
5330-00-391-3658 INTERCHANGEABLE
Seal
1560-00-478-25433094 INTERCHANGEABLE
Adapter Assy-Tail P
Solar Turbines Incorporated Dba Solar Turbines Incorporated
4730-00-786-397211339 INTERCHANGEABLE
Connector,multiple,fluid Pressur
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
9540-01-098-015460-4474 INTERCHANGEABLE
Beam,structural
Transtar Metals Corp
4820-01-264-32713094-024 INTERCHANGEABLE
Valve,plug
Clark-Reliance Llc Dba Jacoby-Tarbox
5305-01-388-0705 INTERCHANGEABLE
Screw,machine
6680-01-437-68063094-022 INTERCHANGEABLE
Indicator,sight,liquid
Clark-Reliance Llc Dba Jacoby-Tarbox
4730-01-438-8747TMS-8954 INTERCHANGEABLE
Packing Nut
Clark-Reliance Llc Dba Jacoby-Tarbox
Cross-Reference Index
Part NumberManufacturer
WW-P-491 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
309-4 Crane Co Div Valve Div (USA)
306 Stockham Valves and Fittings Inc (USA)
MS90522-6L1 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
3110-00-065-4889INTERCHANGEABLE
ROLLER,BEARING
378389
9540-00-188-6267INTERCHANGEABLE
BEAM,STRUCTURAL
5330-00-391-3658INTERCHANGEABLE
SEAL
1560-00-478-2543INTERCHANGEABLE
ADAPTER ASSY-TAIL P
3094
4730-00-786-3972INTERCHANGEABLE
CONNECTOR,MULTIPLE,FLUID PRESSUR
11339
9540-01-098-0154INTERCHANGEABLE
BEAM,STRUCTURAL
60-4474
4820-01-264-3271INTERCHANGEABLE
VALVE,PLUG
3094-024
5305-01-388-0705INTERCHANGEABLE
SCREW,MACHINE
6680-01-437-6806INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
3094-022
4730-01-438-8747INTERCHANGEABLE
PACKING NUT
TMS-8954
5955-01-458-3594INTERCHANGEABLE
OSCILLATOR,CRYSTAL CONTROLLED
3094
6680-01-502-6596INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
3094-26-75

Frequently Asked Questions

What is NSN 4730-00-277-9703?

NSN 4730-00-277-9703 is a Elbow,drainage 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 4730-00-277-9703?

NSN 4730-00-277-9703 has 4 cross-referenced part numbers: WW-P-491 (Federal Specifications Promulgated by General Services Administration Washington DC), 309-4 (Crane Co Div Valve Div), 306 (Stockham Valves and Fittings Inc), MS90522-6L1 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-00-277-9703?

There are 12 known substitutes for 4730-00-277-9703: 3110-00-065-4889, 9540-00-188-6267, 5330-00-391-3658 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WW-P-491?

Key specifications for WW-P-491: Specification/standard Data: 96906-MS90522 GOVERNMENT STANDARD; Thread Series Designator: NPT ALL ENDS; Flow Angle: 90.0 DEGREES; Connection Type: THREADED INTERNAL PIPE FIRST END. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-277-9703 still in active supply?

NSN 4730-00-277-9703 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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