PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

665-3Cartridge,check Valve

Admiral Valve Llc Dba Cpv Manufacturing · NSN 4820-00-759-0827 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-759-0827 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-759-0827. Primary manufacturer part number: 665-3.
Features
  • Cartridge,check Valve — FSC 4820
  • Thread Size and Series/type Designator: 1/2-14 NPT
  • Material: COPPER ALLOY
  • Port Diameter: 0.500 INCHES NOMINAL IN
  • Maximum Operating Temp: 225.0 FAHRENHEIT DEGF
  • Valve Size: 0.500 INCHES IN
  • Operating Pressure: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • 1 verified cross-reference
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Cartridge,check Valve, cataloged under National Stock Number 4820-00-759-0827, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Admiral Valve Llc Dba Cpv Manufacturing. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-759-0827
Primary Part Number665-3
Item NameCartridge,check Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAdmiral Valve Llc Dba Cpv Manufacturing
StatusACTIVE
Thread Size and Series/type Designator1/2-14 NPT
MaterialCOPPER ALLOY
Port Diameter0.500 INCHES NOMINAL IN
Maximum Operating Temp225.0 FAHRENHEIT DEGF
Valve Size0.500 INCHES IN
Operating Pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5133-00-061-629244473 INTERCHANGEABLE
Drill,twist
Greenfield Industries Inc
4720-00-319-1229 INTERCHANGEABLE
Hose Assembly,nonmetallic
5315-00-394-6477 INTERCHANGEABLE
Pin,grooved,headless
2540-00-930-6224 INTERCHANGEABLE
Lock Assembly
5315-01-285-68496653 INTERCHANGEABLE
Key,machine
Coffin Turbo Pump Inc
5365-01-305-69126653 INTERCHANGEABLE
Ring,externally Threaded
Imi Cash Valve Inc
2920-01-406-96606653 INTERCHANGEABLE
Lead,ignition,engine
Bamforth Automotive Inc
6145-01-493-40576653 INTERCHANGEABLE
Cable,power,electrical
Belden, Inc.
8415-01-667-56316653 INTERCHANGEABLE
Glove,shooter's
Hatch Corp Ltd
Cross-Reference Index
Part NumberManufacturer
665-3 PRIMARY Admiral Valve Llc Dba Cpv Manufacturing (USA)
Related Parts
5133-00-061-6292INTERCHANGEABLE
DRILL,TWIST
44473
4720-00-319-1229INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
5315-00-394-6477INTERCHANGEABLE
PIN,GROOVED,HEADLESS
2540-00-930-6224INTERCHANGEABLE
LOCK ASSEMBLY
5315-01-285-6849INTERCHANGEABLE
KEY,MACHINE
6653
5365-01-305-6912INTERCHANGEABLE
RING,EXTERNALLY THREADED
6653
2920-01-406-9660INTERCHANGEABLE
LEAD,IGNITION,ENGINE
6653
6145-01-493-4057INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
6653
8415-01-667-5631INTERCHANGEABLE
GLOVE,SHOOTER'S
6653

Frequently Asked Questions

What is NSN 4820-00-759-0827?

NSN 4820-00-759-0827 is a Cartridge,check Valve, manufactured by Admiral Valve Llc Dba Cpv Manufacturing, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-759-0827?

NSN 4820-00-759-0827 has 1 cross-referenced part number: 665-3 (Admiral Valve Llc Dba Cpv Manufacturing).

What NSN replaces 4820-00-759-0827?

There are 9 known substitutes for 4820-00-759-0827: 5133-00-061-6292, 4720-00-319-1229, 5315-00-394-6477 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 665-3?

Key specifications for 665-3: Thread Size and Series/type Designator: 1/2-14 NPT; Material: COPPER ALLOY; Port Diameter: 0.500 INCHES NOMINAL IN; Maximum Operating Temp: 225.0 FAHRENHEIT DEGF. 6 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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