PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11065Flange,pipe

Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy · NSN 4730-00-289-8121 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-289-8121 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-289-8121. Primary manufacturer part number: 11065.
Features
  • Flange,pipe — FSC 4730
  • Bolt Circle Diameter: 3.500 INCHES MINIMUM AND 3.547 INCHES MAXIMUM IN
  • Face Seating Surface Condition: MACHINED
  • Material Document and Classification: MIL-S-18410,CLASS @A MIL SPEC SINGLE MATERIAL RESPONSE
  • Material: STEEL OR STEEL COMP 1010
  • Maximum Operating Temp and Media for Which Designed: 975.0 FAHRENHEIT STEAM DEGF
  • Departure From Cited Designator: ASMODIFIED BY MATERIAL,FOR USE WITH SCHEDULE 80 PIPE
  • Style Designator: ROUND, ONE BOLT HOLE CIRCLE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel or Steel Comp 1010 construction
General Description

The Flange,pipe, cataloged under National Stock Number 4730-00-289-8121, 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 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy. Government technical data includes 18 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
NSN4730-00-289-8121
Primary Part Number11065
Item NameFlange,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAti Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy
StatusACTIVE
Bolt Circle Diameter3.500 INCHES MINIMUM AND 3.547 INCHES MAXIMUM IN
Face Seating Surface ConditionMACHINED
Material Document and ClassificationMIL-S-18410,CLASS @A MIL SPEC SINGLE MATERIAL RESPONSE
MaterialSTEEL OR STEEL COMP 1010
Maximum Operating Temp and Media for Which Designed975.0 FAHRENHEIT STEAM DEGF
Departure From Cited DesignatorASMODIFIED BY MATERIAL,FOR USE WITH SCHEDULE 80 PIPE
Style DesignatorROUND, ONE BOLT HOLE CIRCLE
Operating Pressure and Type1500.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 1500.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
Nondefinitive Spec/std Data28 TABLE AND 29 TABLE
Thickness1.000 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN
Flange Diameter5.125 INCHES MINIMUM AND 5.156 INCHES MAXIMUM IN
Raised Face Height0.250 INCHES MAXIMUM IN
Raised Face Diameter1.625 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN
Flange Section StyleRAISED FACE, WELDING NECK
Neck Height1.725 INCHES MINIMUM AND 1.755 INCHES MAXIMUM IN
Nominal Pipe Size for Which Designed0.750 INCHES IN
Bolt Hole Quantity4
Bolt Hole Diameter0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-066-0150 INTERCHANGEABLE
Flange,pipe
4730-00-256-8505 INTERCHANGEABLE
Flange,pipe
4730-00-256-8506 INTERCHANGEABLE
Flange,pipe
4730-00-256-8507 INTERCHANGEABLE
Flange,pipe
4730-00-256-8509 INTERCHANGEABLE
Flange,pipe
4730-00-256-8511 INTERCHANGEABLE
Flange,pipe
4730-00-256-8512300-8IN INTERCHANGEABLE
Flange,pipe
The Walworth Company
4730-00-256-8518 INTERCHANGEABLE
Flange,pipe
4730-00-289-8120 INTERCHANGEABLE
Flange,pipe
4730-00-289-8124 INTERCHANGEABLE
Flange,pipe
Cross-Reference Index
Part NumberManufacturer
11065 PRIMARY Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA)
B16-5-1961 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
Related Parts
4730-00-066-0150INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8505INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8506INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8507INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8509INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8511INTERCHANGEABLE
FLANGE,PIPE
4730-00-256-8512INTERCHANGEABLE
FLANGE,PIPE
300-8IN
4730-00-256-8518INTERCHANGEABLE
FLANGE,PIPE
4730-00-289-8120INTERCHANGEABLE
FLANGE,PIPE
4730-00-289-8124INTERCHANGEABLE
FLANGE,PIPE
4730-00-289-8125INTERCHANGEABLE
FLANGE,PIPE
4730-00-289-8127INTERCHANGEABLE
FLANGE,PIPE

Frequently Asked Questions

What is NSN 4730-00-289-8121?

NSN 4730-00-289-8121 is a Flange,pipe, manufactured by Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-289-8121?

NSN 4730-00-289-8121 has 2 cross-referenced part numbers: 11065 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy), B16-5-1961 (American National Standards Institute Incorporated Dba American National Standards Institute).

What NSN replaces 4730-00-289-8121?

There are 12 known substitutes for 4730-00-289-8121: 4730-00-066-0150, 4730-00-256-8505, 4730-00-256-8506 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11065?

Key specifications for 11065: Bolt Circle Diameter: 3.500 INCHES MINIMUM AND 3.547 INCHES MAXIMUM IN; Face Seating Surface Condition: MACHINED; Material Document and Classification: MIL-S-18410,CLASS @A MIL SPEC SINGLE MATERIAL RESPONSE; Material: STEEL OR STEEL COMP 1010. 18 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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