PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AA59326/4-1-ACoupling Half,quick Disconnect

Federal Commercial Item Description Promulgated by General Services Administration Washington DC · NSN 4730-01-186-0816 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-186-0816 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-186-0816. Primary manufacturer part number: AA59326/4-1-A.
Features
  • Coupling Half,quick Disconnect — FSC 4730
  • Surface Treatment: ANODIZE BODY
  • Surface Treatment Document and Classification: MIL-A-8625,TY2,CL1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
  • Bolt Circle Nominal Diameter: 3.750 INCHES IN
  • Material Document and Classification: QQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
  • Connection Style: PLAIN ALL ENDS
  • Material: ALUMINUM ALLOY BODY
  • Connection Type: FLANGE FIRST FLUID END CONNECTION
Applications
  • Applications requiring Aluminum Alloy Body construction
General Description

The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-186-0816, 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 Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-186-0816
Primary Part NumberAA59326/4-1-A
Item NameCoupling Half,quick Disconnect
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerFederal Commercial Item Description Promulgated by General Services Administration Washington DC
StatusACTIVE
Surface TreatmentANODIZE BODY
Surface Treatment Document and ClassificationMIL-A-8625,TY2,CL1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
Bolt Circle Nominal Diameter3.750 INCHES IN
Material Document and ClassificationQQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
Connection StylePLAIN ALL ENDS
MaterialALUMINUM ALLOY BODY
Connection TypeFLANGE FIRST FLUID END CONNECTION
Quick Disconnect MethodCAM-LOCKING ALL ENDS
Basic Shape StyleROUND FIRST FLUID END CONNECTION
Connection TypeEXTERNAL QUICK DISCONNECT ALL ENDS
Bolt Hole Quantity6
Nominal Thickness0.375 INCHES IN
Style DesignatorMALE COUPLING HALF
Quick Disconnect Nominal Size2.484 INCHES ALL ENDS IN
Bolt Hole Nominal Diameter0.438 INCHES IN
Nominal Outside Diameter4.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4730-00-402-5955 INTERCHANGEABLE
Coupling Half,quick Disconnect
5330-00-551-4572 INTERCHANGEABLE
Gasket
4730-00-840-5347 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-00-889-2380 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-01-416-1533 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-01-518-8444 INTERCHANGEABLE
Coupling Half,quick Disconnect
4730-01-664-6169 INTERCHANGEABLE
Coupling Half,quick Disconnect
Cross-Reference Index
Part NumberManufacturer
AA59326/4-1-A Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
13227E6555 Cecom Lr Center (USA)
2078-432 Axillon Aerospace (rockmart), Llc (USA)
A-A-59326/4 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
1-03-00-5005 Wood William and Associates Inc (USA)
AA59326IV11 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
200-ALT-AL Dvcc, Llc (USA)
480-4-44917-101-2 Axillon Aerospace (rockmart), Llc (USA)
MS27023-11 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
4730-00-402-5955INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
5330-00-551-4572INTERCHANGEABLE
GASKET
4730-00-840-5347INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-00-889-2380INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-01-416-1533INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-01-518-8444INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
4730-01-664-6169INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT

Frequently Asked Questions

What is NSN 4730-01-186-0816?

NSN 4730-01-186-0816 is a Coupling Half,quick Disconnect, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-186-0816?

NSN 4730-01-186-0816 has 9 cross-referenced part numbers: AA59326/4-1-A (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), 13227E6555 (Cecom Lr Center), 2078-432 (Axillon Aerospace (rockmart), Llc), A-A-59326/4 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), 1-03-00-5005 (Wood William and Associates Inc) and 4 more.

What NSN replaces 4730-01-186-0816?

There are 7 known substitutes for 4730-01-186-0816: 4730-00-402-5955, 5330-00-551-4572, 4730-00-840-5347 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AA59326/4-1-A?

Key specifications for AA59326/4-1-A: Surface Treatment: ANODIZE BODY; Surface Treatment Document and Classification: MIL-A-8625,TY2,CL1 MIL SPEC SINGLE TREATMENT RESPONSE BODY; Bolt Circle Nominal Diameter: 3.750 INCHES IN; Material Document and Classification: QQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY. 17 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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