PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

56251Coupling Half,quick Disconnect

Chapco · NSN 4730-00-673-1812 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-673-1812 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-673-1812. Primary manufacturer part number: 56251.
Features
  • Coupling Half,quick Disconnect — FSC 4730
  • 1 verified cross-reference
  • Primary manufacturer: Chapco
Applications
  • Plumbing and fluid distribution
  • Industrial piping systems
  • Fuel and lubricant distribution
General Description

The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-673-1812, 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 Chapco. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameCoupling Half,quick Disconnect
FSC / FSG4730 — No Item Name Available (FSG 47)
ManufacturersChapco (CAGE 08093)
Technical Specifications
ParameterValue
NSN4730-00-673-1812
Primary Part Number56251
Item NameCoupling Half,quick Disconnect
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerChapco
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4730-00-288-4121A758R INTERCHANGEABLE
Plug,self Closing
Eaton Aerospace Llc Div Fluid and Electrical Distribution Division
4320-00-353-588469035C91 INTERCHANGEABLE
Pump,rotary
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
4140-01-505-754156251 INTERCHANGEABLE
Blower Unit
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
Cross-Reference Index
Part NumberManufacturer
56251 Chapco (USA)
Related Parts
4730-00-288-4121INTERCHANGEABLE
PLUG,SELF CLOSING
A758R
4320-00-353-5884INTERCHANGEABLE
PUMP,ROTARY
69035C91
4140-01-505-7541INTERCHANGEABLE
BLOWER UNIT
56251

Frequently Asked Questions

What is NSN 4730-00-673-1812?

NSN 4730-00-673-1812 is a Coupling Half,quick Disconnect, manufactured by Chapco, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-673-1812?

NSN 4730-00-673-1812 has 1 cross-referenced part number: 56251 (Chapco).

What NSN replaces 4730-00-673-1812?

There are 3 known substitutes for 4730-00-673-1812: 4730-00-288-4121, 4320-00-353-5884, 4140-01-505-7541. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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