PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-C-21049Coupling Half,quick Disconnect

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-01-550-0056 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-550-0056 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-550-0056. Primary manufacturer part number: MIL-C-21049.
Features
  • Coupling Half,quick Disconnect — FSC 4730
  • Specification/standard Data: 96906-MS22068 GOVERNMENT STANDARD
  • Features Provided: SAFETY LOCKING FEATURE
  • Style Designator: MALE COUPLING HALF
  • Media for Which Designed: OXYGEN, LIQUID SINGLE RESPONSE
  • 2 verified cross-references
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Plumbing and fluid distribution
  • Industrial piping systems
  • Fuel and lubricant distribution
General Description

The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-550-0056, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 4 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-550-0056
Primary Part NumberMIL-C-21049
Item NameCoupling Half,quick Disconnect
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Specification/standard Data96906-MS22068 GOVERNMENT STANDARD
Features ProvidedSAFETY LOCKING FEATURE
Style DesignatorMALE COUPLING HALF
Media for Which DesignedOXYGEN, LIQUID SINGLE RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4730-00-010-5297 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-00-630-0310 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-00-755-7237 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-00-918-5701 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-00-928-6818 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-01-237-6231 INTERCHANGEABLE
Coupling Assembly,quick Disconne
4730-01-572-0645 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-01-572-0646 INTERCHANGEABLE
Coupling Half,quick Disconnect
Cross-Reference Index
Part NumberManufacturer
MIL-C-21049 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS22068-5-2M Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-010-5297INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-00-630-0310INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-00-755-7237INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-00-918-5701INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-00-928-6818INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-01-237-6231INTERCHANGEABLE
COUPLING ASSEMBLY,QUICK DISCONNE
4730-01-572-0645INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-01-572-0646INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT

Frequently Asked Questions

What is NSN 4730-01-550-0056?

NSN 4730-01-550-0056 is a Coupling Half,quick Disconnect, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-550-0056?

NSN 4730-01-550-0056 has 2 cross-referenced part numbers: MIL-C-21049 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS22068-5-2M (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4730-01-550-0056?

There are 8 known substitutes for 4730-01-550-0056: 4730-00-010-5297, 4730-00-630-0310, 4730-00-755-7237 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-C-21049?

Key specifications for MIL-C-21049: Specification/standard Data: 96906-MS22068 GOVERNMENT STANDARD; Features Provided: SAFETY LOCKING FEATURE; Style Designator: MALE COUPLING HALF; Overall Length: 2.136 INCHES NOMINAL IN. 5 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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