PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

665-5Valve,check

Admiral Valve Llc Dba Cpv Manufacturing · NSN 4820-01-018-1823 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-018-1823 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-018-1823. Primary manufacturer part number: 665-5.
Features
  • Valve,check — FSC 4820
  • Mounting Position: HORIZONTAL OR VERTICAL
  • Connection Type: THREADED CARTRIDGE ALL ENDS
  • Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS
  • Valve Operation Method: AUTOMATIC
  • Material: COPPER ALLOY 606 BODY
  • Media for Which Designed: WATER-OIL-GAS SINGLE RESPONSE
  • Material: NICKEL ALLOY R-405 SEAT
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 606 Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-01-018-1823, 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 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-018-1823
Primary Part Number665-5
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAdmiral Valve Llc Dba Cpv Manufacturing
StatusACTIVE
Mounting PositionHORIZONTAL OR VERTICAL
Connection TypeTHREADED CARTRIDGE ALL ENDS
Connection StylePLAIN (SCREW-IN CARTRIDGE) ALL ENDS
Valve Operation MethodAUTOMATIC
MaterialCOPPER ALLOY 606 BODY
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
MaterialNICKEL ALLOY R-405 SEAT
Style DesignatorSCREW-IN CARTRIDGE
Disk Loading MethodSPRING
Maximum Operating Temp225.0 FAHRENHEIT SINGLE RESPONSE DEGF
Flow Control DeviceDISK
Thread Series DesignatorNPT ALL ENDS
Operating Pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size1.000 INCHES ALL ENDS IN
Thread DirectionRIGHT-HAND ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5133-00-061-628944475 INTERCHANGEABLE
Drill,twist
Greenfield Industries Inc
6240-00-155-7790370069 INTERCHANGEABLE
Lamp,incandescent
Hyster-Yale Group, Inc. Div Hyster-Yale Materials Handling
5935-00-204-6593PL308 INTERCHANGEABLE
Connector,plug,electrical
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5330-00-274-7490 INTERCHANGEABLE
Packing Material
5950-00-581-996710-1385-2 INTERCHANGEABLE
Transformer,power
The Boeing Company Div Legacy Wichita
2920-00-777-7166 INTERCHANGEABLE
Armature,motor
2530-01-133-5747 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
4820-01-217-7127 INTERCHANGEABLE
Valve,cartridge
1630-01-310-904966-105 INTERCHANGEABLE
Lining,friction
Aircraft Wheel and Brake, Llc Dba Cleveland Wheel and Brake Systems
5330-01-609-36946655 INTERCHANGEABLE
Seal,plain
Flowserve Us Inc. Div Flowserve Cookeville Valve Operation
Cross-Reference Index
Part NumberManufacturer
PL-308 Admiral Valve Llc Dba Cpv Manufacturing (USA)
665-5 PRIMARY Admiral Valve Llc Dba Cpv Manufacturing (USA)
Related Parts
5133-00-061-6289INTERCHANGEABLE
DRILL,TWIST
44475
6240-00-155-7790INTERCHANGEABLE
LAMP,INCANDESCENT
370069
5935-00-204-6593INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
PL308
5330-00-274-7490INTERCHANGEABLE
PACKING MATERIAL
5950-00-581-9967INTERCHANGEABLE
TRANSFORMER,POWER
10-1385-2
2920-00-777-7166INTERCHANGEABLE
ARMATURE,MOTOR
2530-01-133-5747INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
4820-01-217-7127INTERCHANGEABLE
VALVE,CARTRIDGE
1630-01-310-9049INTERCHANGEABLE
LINING,FRICTION
66-105
5330-01-609-3694INTERCHANGEABLE
SEAL,PLAIN
6655
5330-01-612-7164INTERCHANGEABLE
PACKING,PREFORMED
5940-01-663-7198INTERCHANGEABLE
SPLICE,CONDUCTOR

Frequently Asked Questions

What is NSN 4820-01-018-1823?

NSN 4820-01-018-1823 is a Valve,check, 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 4820-01-018-1823?

NSN 4820-01-018-1823 has 2 cross-referenced part numbers: PL-308 (Admiral Valve Llc Dba Cpv Manufacturing), 665-5 (Admiral Valve Llc Dba Cpv Manufacturing).

What NSN replaces 4820-01-018-1823?

There are 12 known substitutes for 4820-01-018-1823: 5133-00-061-6289, 6240-00-155-7790, 5935-00-204-6593 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 665-5?

Key specifications for 665-5: Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED CARTRIDGE ALL ENDS; Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Valve Operation Method: AUTOMATIC. 16 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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