PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6131Adapter,straight,flange to Hose

Kovatch Corp. · NSN 4730-01-133-7425 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-133-7425 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-133-7425. Primary manufacturer part number: 6131.
Features
  • Adapter,straight,flange to Hose — FSC 4730
  • Flange Face Design: PLAIN WITH GASKET GROOVE FIRST END
  • Nominal Thickness: 0.342 INCHES FIRST END IN
  • Bolt Hole Quantity: 4 FIRST END
  • Connection Style: GASKET SEAL (HOSE) SECOND END
  • Thread Class: 2B SECOND END
  • Nominal Overall Length: 1.535 INCHES IN
  • Nominal Length: 4.188 INCHES FIRST END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,flange to Hose, cataloged under National Stock Number 4730-01-133-7425, 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 18 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
NSN4730-01-133-7425
Primary Part Number6131
Item NameAdapter,straight,flange to Hose
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerKovatch Corp.
StatusACTIVE
Flange Face DesignPLAIN WITH GASKET GROOVE FIRST END
Nominal Thickness0.342 INCHES FIRST END IN
Bolt Hole Quantity4 FIRST END
Connection StyleGASKET SEAL (HOSE) SECOND END
Thread Class2B SECOND END
Nominal Overall Length1.535 INCHES IN
Nominal Length4.188 INCHES FIRST END IN
Bolt Hole Nominal Diameter0.326 INCHES FIRST END IN
Thread Quantity Per Inch8 SECOND END
Flange ShapeRECTANGULAR WITH HOLES FIRST END
Center to Center Nominal Distance Between Bolt Holes Along Width3.342 INCHES FIRST END IN
Center to Center Nominal Distance Between Bolt Holes Along Length3.356 INCHES FIRST END IN
Nominal Thread Size3.312 INCHES SECOND END IN
Thread Series DesignatorUN SECOND END
Connection TypeTHREADED INTERNAL HOSE SECOND END
Nominal Width4.125 INCHES FIRST END IN
MaterialCOPPER ALLOY OVERALL
Connection TypeFLANGE FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-142-4280 INTERCHANGEABLE
Bearing,ball,airframe
5310-00-168-641223601-00160 INTERCHANGEABLE
Washer,flat
Schneider Electric Usa, Inc.
1615-00-589-8443S1635-63333-1 INTERCHANGEABLE
Guide Shaft,tail Ro
Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
3110-00-836-961153175T INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5330-01-017-2591257129 INTERCHANGEABLE
Gasket
Bromine Systems Inc
9150-01-037-1306613-1 INTERCHANGEABLE
Lubricant,ammunition Case
Sanitek Products Inc
5945-01-137-0247613-1 INTERCHANGEABLE
Relay,solid State
Teledyne Defense Electronics, Llc Dba Teledyne Relays Div Https://www.teledyne.com/what-We-Do/
5815-01-147-21476131 INTERCHANGEABLE
Keyboard-Transmitter,teletypewri
Data General Corporation
3020-01-303-9268 INTERCHANGEABLE
Gear,internal
5995-01-371-75666131 INTERCHANGEABLE
Cable Assembly Set,electrical
Oriel Corp
Cross-Reference Index
Part NumberManufacturer
6131 Philadelphia Valve Co (USA)
6131 PRIMARY Kovatch Corp. (USA)
B1G-6131 PRIMARY Echelon Supply and Service, Inc. (USA)
Related Parts
3110-00-142-4280INTERCHANGEABLE
BEARING,BALL,AIRFRAME
5310-00-168-6412INTERCHANGEABLE
WASHER,FLAT
23601-00160
1615-00-589-8443INTERCHANGEABLE
GUIDE SHAFT,TAIL RO
S1635-63333-1
3110-00-836-9611INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
53175T
5330-01-017-2591INTERCHANGEABLE
GASKET
257129
9150-01-037-1306INTERCHANGEABLE
LUBRICANT,AMMUNITION CASE
613-1
5945-01-137-0247INTERCHANGEABLE
RELAY,SOLID STATE
613-1
5815-01-147-2147INTERCHANGEABLE
KEYBOARD-TRANSMITTER,TELETYPEWRI
6131
3020-01-303-9268INTERCHANGEABLE
GEAR,INTERNAL
5995-01-371-7566INTERCHANGEABLE
CABLE ASSEMBLY SET,ELECTRICAL
6131
5136-01-431-1825INTERCHANGEABLE
DIE,THREAD CUTTING
6131
3020-01-624-1222INTERCHANGEABLE
OLDHAM WAFER
6131

Frequently Asked Questions

What is NSN 4730-01-133-7425?

NSN 4730-01-133-7425 is a Adapter,straight,flange to Hose, manufactured by Kovatch Corp., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-133-7425?

NSN 4730-01-133-7425 has 3 cross-referenced part numbers: 6131 (Philadelphia Valve Co), 6131 (Kovatch Corp.), B1G-6131 (Echelon Supply and Service, Inc.).

What NSN replaces 4730-01-133-7425?

There are 12 known substitutes for 4730-01-133-7425: 3110-00-142-4280, 5310-00-168-6412, 1615-00-589-8443 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6131?

Key specifications for 6131: Flange Face Design: PLAIN WITH GASKET GROOVE FIRST END; Nominal Thickness: 0.342 INCHES FIRST END IN; Bolt Hole Quantity: 4 FIRST END; Connection Style: GASKET SEAL (HOSE) SECOND END. 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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