PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51256-1Coupling Half,quick Disconnect

Transdigm Inc Div Adelwiggins Group · NSN 4730-01-461-9000 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-461-9000 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-461-9000. Primary manufacturer part number: 51256-1.
Features
  • Coupling Half,quick Disconnect — FSC 4730
  • Connection Style: FLARED ALL ENDS
  • Connection Type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
  • Thread Quantity Per Inch: 18 ALL ENDS
  • Quick Disconnect Nominal Size: 1.340 INCHES FIRST QUICK DISCONNECT END IN
  • Connection Type: EXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END
  • Style Designator: MALE COUPLING HALF
  • Quick Disconnect Method: PUSH-PULL FIRST QUICK DISCONNECT END
Applications
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-461-9000, 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 Transdigm Inc Div Adelwiggins Group. Government technical data includes 14 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-461-9000
Primary Part Number51256-1
Item NameCoupling Half,quick Disconnect
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerTransdigm Inc Div Adelwiggins Group
StatusACTIVE
Connection StyleFLARED ALL ENDS
Connection TypeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
Thread Quantity Per Inch18 ALL ENDS
Quick Disconnect Nominal Size1.340 INCHES FIRST QUICK DISCONNECT END IN
Connection TypeEXTERNAL QUICK DISCONNECT FIRST QUICK DISCONNECT END
Style DesignatorMALE COUPLING HALF
Quick Disconnect MethodPUSH-PULL FIRST QUICK DISCONNECT END
Thread Series DesignatorUNF ALL ENDS
Leg Length0.750 INCHES NOMINAL IN
Thread Class2A ALL ENDS A
MaterialSTEEL CORROSION RESISTING BODY
Nominal Thread Size0.626 INCHES ALL ENDS IN
Nominal Outside Diameter Tube Accommodated0.375 INCHES ALL ENDS IN
Seat Angle37.0 DEGREES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5331-00-090-0707942 INTERCHANGEABLE
O-Ring
Pierce-Roberts Rubber Company Dba Pierce Roberts Rubber
2610-00-262-8752 INTERCHANGEABLE
Tire,pneumatic,vehicular
6625-01-069-957551256-1 INTERCHANGEABLE
Housing,indicator
Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc
3040-01-075-6043512561 INTERCHANGEABLE
Gearshaft,spur
Honeywell International, Inc Div Aerospace-Tucson
Cross-Reference Index
Part NumberManufacturer
12438382-1 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
51256-1 PRIMARY Transdigm Inc Div Adelwiggins Group (USA)
Related Parts
5331-00-090-0707INTERCHANGEABLE
O-RING
942
2610-00-262-8752INTERCHANGEABLE
TIRE,PNEUMATIC,VEHICULAR
6625-01-069-9575INTERCHANGEABLE
HOUSING,INDICATOR
51256-1
3040-01-075-6043INTERCHANGEABLE
GEARSHAFT,SPUR
512561

Frequently Asked Questions

What is NSN 4730-01-461-9000?

NSN 4730-01-461-9000 is a Coupling Half,quick Disconnect, manufactured by Transdigm Inc Div Adelwiggins Group, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-461-9000?

NSN 4730-01-461-9000 has 2 cross-referenced part numbers: 12438382-1 (U S Army Tank Automotive Command Amsta-Im-Mm), 51256-1 (Transdigm Inc Div Adelwiggins Group).

What NSN replaces 4730-01-461-9000?

There are 4 known substitutes for 4730-01-461-9000: 5331-00-090-0707, 2610-00-262-8752, 6625-01-069-9575 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51256-1?

Key specifications for 51256-1: Connection Style: FLARED ALL ENDS; Connection Type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION; Thread Quantity Per Inch: 18 ALL ENDS; Quick Disconnect Nominal Size: 1.340 INCHES FIRST QUICK DISCONNECT END IN. 16 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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