PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6125Elbow,flange

Kovatch Corp. · NSN 4730-01-134-3655 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-134-3655 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-134-3655. Primary manufacturer part number: 6125.
Features
  • Elbow,flange — FSC 4730
  • Bolt Circle Nominal Diameter: 3.000 INCHES SECOND END3.000 INCHES SECOND END IN
  • Flange Shape: RECTANGULAR WITH HOLES FIRST ENDRECTANGULAR WITH HOLES FIRST END
  • Connection Type: FLANGE FIRST ENDFLANGE FIRST END
  • Leg Length: 4.125 INCHES NOMINAL ALL ENDS4.125 INCHES NOMINAL ALL ENDS IN
  • Center to Center Nominal Distance Between Bolt Holes Along Width: 3.375 INCHES FIRST END3.375 INCHES FIRST END IN
  • Flange Face Design: PLAIN FIRST ENDPLAIN FIRST END
  • Flange Shape: ROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Elbow,flange, cataloged under National Stock Number 4730-01-134-3655, 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 Kovatch Corp.. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN4730-01-134-3655
Primary Part Number6125
Item NameElbow,flange
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerKovatch Corp.
StatusACTIVE
Bolt Circle Nominal Diameter3.000 INCHES SECOND END3.000 INCHES SECOND END IN
Flange ShapeRECTANGULAR WITH HOLES FIRST ENDRECTANGULAR WITH HOLES FIRST END
Connection TypeFLANGE FIRST ENDFLANGE FIRST END
Leg Length4.125 INCHES NOMINAL ALL ENDS4.125 INCHES NOMINAL ALL ENDS IN
Center to Center Nominal Distance Between Bolt Holes Along Width3.375 INCHES FIRST END3.375 INCHES FIRST END IN
Flange Face DesignPLAIN FIRST ENDPLAIN FIRST END
Flange ShapeROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END
Nominal Thickness0.625 INCHES FIRST END0.625 INCHES FIRST END IN
Flow Angle90.0 DEGREES90.0 DEGREES
Nominal Outside Diameter5.312 INCHES SECOND END5.312 INCHES SECOND END IN
Bolt Hole Quantity6 SECOND END6 SECOND END
MaterialCOPPER ALLOY OVERALL
Nominal Width4.250 INCHES FIRST END4.250 INCHES FIRST END IN
Center to Center Nominal Distance Between Bolt Holes Along Length3.375 INCHES FIRST END3.375 INCHES FIRST END IN
Nominal Thickness1.000 INCHES SECOND END1.000 INCHES SECOND END IN
Bolt Hole Nominal Diameter0.312 INCHES FIRST END0.312 INCHES FIRST END IN
Nominal Length4.250 INCHES FIRST END4.250 INCHES FIRST END IN
Connection TypeFLANGE SECOND ENDFLANGE SECOND END
Bolt Hole Nominal Diameter0.312 INCHES SECOND END0.312 INCHES SECOND END IN
Bolt Hole Quantity4 FIRST END4 FIRST END
Flange Face DesignPLAIN SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3020-00-099-34018192999 INTERCHANGEABLE
Guard,mechanical Drive
Us Army Aviation and Missile Command
3110-00-100-355828150 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Texas Foundries Inc
3455-00-293-052508880 INTERCHANGEABLE
Cutter,milling,metal Slitting
Niagara Cutter Inc
5955-00-525-5697154029P5 INTERCHANGEABLE
Crystal Unit,quartz
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
5930-00-755-32236125 INTERCHANGEABLE
Switch,push
Haydon Kerk Motion Solutions, Inc. Dba Haydon Kerk Motion Solutions Inc Div Haydon Kerk
5330-00-843-72516125 INTERCHANGEABLE
Packing,preformed
Unimasco Inc
5935-00-970-7903 INTERCHANGEABLE
Connector,receptacle,electrical
4920-00-972-09766125 INTERCHANGEABLE
Test Cap,aircraft Maintenance
Fluid Power, Inc.
3110-01-178-15436-1-25 INTERCHANGEABLE
Bearing
Stein Inc
7025-01-262-7070005-18552 INTERCHANGEABLE
Transport,magnetic Tape
Data General Corporation
Cross-Reference Index
Part NumberManufacturer
6125 PRIMARY Kovatch Corp. (USA)
6125 Philadelphia Valve Co (USA)
1949-6125MOD PRIMARY Wheeler Fleet Solutions, Co. (USA)
Related Parts
3020-00-099-3401INTERCHANGEABLE
GUARD,MECHANICAL DRIVE
8192999
3110-00-100-3558INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
28150
3455-00-293-0525INTERCHANGEABLE
CUTTER,MILLING,METAL SLITTING
08880
5955-00-525-5697INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
154029P5
5930-00-755-3223INTERCHANGEABLE
SWITCH,PUSH
6125
5330-00-843-7251INTERCHANGEABLE
PACKING,PREFORMED
6125
5935-00-970-7903INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
4920-00-972-0976INTERCHANGEABLE
TEST CAP,AIRCRAFT MAINTENANCE
6125
3110-01-178-1543INTERCHANGEABLE
BEARING
6-1-25
7025-01-262-7070INTERCHANGEABLE
TRANSPORT,MAGNETIC TAPE
005-18552
5340-01-290-8533INTERCHANGEABLE
HARDWARE KIT,SHOP SET INSTALLATI
6125
4440-01-346-9873INTERCHANGEABLE
RETAINER,DEHYDRATOR SCREEN
6125B-G501

Frequently Asked Questions

What is NSN 4730-01-134-3655?

NSN 4730-01-134-3655 is a Elbow,flange, manufactured by Kovatch Corp., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-134-3655?

NSN 4730-01-134-3655 has 3 cross-referenced part numbers: 6125 (Kovatch Corp.), 6125 (Philadelphia Valve Co), 1949-6125MOD (Wheeler Fleet Solutions, Co.).

What NSN replaces 4730-01-134-3655?

There are 12 known substitutes for 4730-01-134-3655: 3020-00-099-3401, 3110-00-100-3558, 3455-00-293-0525 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6125?

Key specifications for 6125: Bolt Circle Nominal Diameter: 3.000 INCHES SECOND END3.000 INCHES SECOND END IN; Flange Shape: RECTANGULAR WITH HOLES FIRST ENDRECTANGULAR WITH HOLES FIRST END; Connection Type: FLANGE FIRST ENDFLANGE FIRST END; Leg Length: 4.125 INCHES NOMINAL ALL ENDS4.125 INCHES NOMINAL ALL ENDS IN. 22 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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