PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-604Coupling Assembly,self-Sealing

Enerpac Tool Group Corp · NSN 4730-01-311-1663 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-311-1663 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-311-1663. Primary manufacturer part number: A-604.
Features
  • Coupling Assembly,self-Sealing — FSC 4730
  • Thread Series Designator: NPT SECOND QUICK DISCONNECT END
  • Connection Type: THREADED EXTERNAL PIPE FIRST QUICK DISCONNECT END
  • Connection Type: THREADED INTERNAL PIPE SECOND QUICK DISCONNECT END
  • Nominal Thread Size: 0.375 INCHES SECOND QUICK DISCONNECT END IN
  • Features Provided: SELF-SEALING
  • Connection Style: PLAIN FIRST QUICK DISCONNECT END
  • Connection Style: PLAIN SECOND QUICK DISCONNECT END
Applications
  • Plumbing and fluid distribution
  • Industrial piping systems
  • Fuel and lubricant distribution
General Description

The Coupling Assembly,self-Sealing, cataloged under National Stock Number 4730-01-311-1663, 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 Enerpac Tool Group Corp. Government technical data includes 13 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-01-311-1663
Primary Part NumberA-604
Item NameCoupling Assembly,self-Sealing
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerEnerpac Tool Group Corp
StatusCANCELLED
Thread Series DesignatorNPT SECOND QUICK DISCONNECT END
Connection TypeTHREADED EXTERNAL PIPE FIRST QUICK DISCONNECT END
Connection TypeTHREADED INTERNAL PIPE SECOND QUICK DISCONNECT END
Nominal Thread Size0.375 INCHES SECOND QUICK DISCONNECT END IN
Features ProvidedSELF-SEALING
Connection StylePLAIN FIRST QUICK DISCONNECT END
Connection StylePLAIN SECOND QUICK DISCONNECT END
Second End Relationship with First EndNOT IDENTICAL
Thread Series DesignatorNPT FIRST QUICK DISCONNECT END
Nominal Thread Size0.375 INCHES FIRST QUICK DISCONNECT END IN
Furnished Items and Quantity1 CAP
Style DesignatorCOUPLING ASSEMBLY
Operating Pressure10000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5325-00-282-5607 INTERCHANGEABLE
Ring,retaining
4730-00-430-358765580 INTERCHANGEABLE
Coupling Assembly,hose
Applied Power Inc Power Packer
5961-00-455-4384 INTERCHANGEABLE
Semiconductor Devices,unitized
3120-00-540-8584 INTERCHANGEABLE
Bearing,sleeve
5935-00-543-87751225864 INTERCHANGEABLE
Connector,receptacle,electrical
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5930-00-810-4835FM134 INTERCHANGEABLE
Switch,thermostatic
Ulanet George Co
3030-00-939-9081 INTERCHANGEABLE
Belts,v,matched Set
5935-01-159-1599720360-1 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Company Div Rmd Strategic
4320-01-192-8444A604 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
5305-01-221-3157A604 INTERCHANGEABLE
Screw,cap,hexagon Head
Lawson Products, Inc.
Cross-Reference Index
Part NumberManufacturer
A-604 PRIMARY Enerpac Tool Group Corp (USA)
Z604 Blackhawk Machine Products Inc (USA)
Related Parts
5325-00-282-5607INTERCHANGEABLE
RING,RETAINING
4730-00-430-3587INTERCHANGEABLE
COUPLING ASSEMBLY,HOSE
65580
5961-00-455-4384INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
3120-00-540-8584INTERCHANGEABLE
BEARING,SLEEVE
5935-00-543-8775INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
1225864
5930-00-810-4835INTERCHANGEABLE
SWITCH,THERMOSTATIC
FM134
3030-00-939-9081INTERCHANGEABLE
BELTS,V,MATCHED SET
5935-01-159-1599INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
720360-1
4320-01-192-8444INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A604
5305-01-221-3157INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
A604

Frequently Asked Questions

What is NSN 4730-01-311-1663?

NSN 4730-01-311-1663 is a Coupling Assembly,self-Sealing, manufactured by Enerpac Tool Group Corp, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-01-311-1663?

NSN 4730-01-311-1663 has 2 cross-referenced part numbers: A-604 (Enerpac Tool Group Corp), Z604 (Blackhawk Machine Products Inc).

What NSN replaces 4730-01-311-1663?

There are 10 known substitutes for 4730-01-311-1663: 5325-00-282-5607, 4730-00-430-3587, 5961-00-455-4384 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A-604?

Key specifications for A-604: Thread Series Designator: NPT SECOND QUICK DISCONNECT END; Connection Type: THREADED EXTERNAL PIPE FIRST QUICK DISCONNECT END; Connection Type: THREADED INTERNAL PIPE SECOND QUICK DISCONNECT END; Nominal Thread Size: 0.375 INCHES SECOND QUICK DISCONNECT END IN. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-01-311-1663 still in active supply?

NSN 4730-01-311-1663 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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