PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

665-1Valve,check

Admiral Valve Llc Dba Cpv Manufacturing · NSN 4820-00-758-7156 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-758-7156 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-758-7156. Primary manufacturer part number: 665-1.
Features
  • Valve,check — FSC 4820
  • Thread Direction: LEFT-HAND ALL ENDS
  • Maximum Operating Temp: 225.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Thread Quantity Per Inch: 10 ALL ENDS
  • Operating Pressure: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Media for Which Designed: WATER-OIL-GAS SINGLE RESPONSE
  • Nominal Thread Size: 1.125 INCHES ALL ENDS IN
  • Thread Series Designator: UNS ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-00-758-7156, 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-758-7156
Primary Part Number665-1
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAdmiral Valve Llc Dba Cpv Manufacturing
StatusACTIVE
Thread DirectionLEFT-HAND ALL ENDS
Maximum Operating Temp225.0 FAHRENHEIT SINGLE RESPONSE DEGF
Thread Quantity Per Inch10 ALL ENDS
Operating Pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Nominal Thread Size1.125 INCHES ALL ENDS IN
Thread Series DesignatorUNS ALL ENDS
Furnished Items and Quantity1 GASKET
MaterialCOPPER ALLOY BODY
Connection TypeTHREADED CARTRIDGE ALL ENDS
Valve Operation MethodAUTOMATIC
Connection StylePLAIN (TUBE) ALL ENDS
Disk Loading MethodSPRING
Flow Control DeviceDISK
Mounting PositionHORIZONTAL OR VERTICAL
Thread Class2A ALL ENDS A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5133-00-084-434841-11048 INTERCHANGEABLE
Drill,twist
Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039
5970-00-224-5227 INTERCHANGEABLE
Insulator,knob
4720-00-319-1229 INTERCHANGEABLE
Hose Assembly,nonmetallic
3110-00-885-98724357 INTERCHANGEABLE
Bearing,roller,tapered
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5940-00-937-821812752B-4 INTERCHANGEABLE
Terminal,stud
Staffall, Inc. Dba Staffall Inc
6530-01-133-41826051 INTERCHANGEABLE
Drape,surgical
Solventum Us Llc
6685-01-135-43576651 INTERCHANGEABLE
Thermocouple,contact
Unison Industries Llc
4820-01-151-39256651 INTERCHANGEABLE
Cap,valve
Imi Cash Valve Inc
6530-01-199-19897000042934 INTERCHANGEABLE
Drape,surgical
Solventum Us Llc
8415-01-667-56066651 INTERCHANGEABLE
Glove,shooter's
Hatch Corp Ltd
Cross-Reference Index
Part NumberManufacturer
6184-23 Air Dry Co of America, Llc (USA)
104231-G Admiral Valve Llc Dba Cpv Manufacturing (USA)
665-1 PRIMARY Admiral Valve Llc Dba Cpv Manufacturing (USA)
Related Parts
5133-00-084-4348INTERCHANGEABLE
DRILL,TWIST
41-11048
5970-00-224-5227INTERCHANGEABLE
INSULATOR,KNOB
4720-00-319-1229INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
3110-00-885-9872INTERCHANGEABLE
BEARING,ROLLER,TAPERED
4357
5940-00-937-8218INTERCHANGEABLE
TERMINAL,STUD
12752B-4
6530-01-133-4182INTERCHANGEABLE
DRAPE,SURGICAL
6051
6685-01-135-4357INTERCHANGEABLE
THERMOCOUPLE,CONTACT
6651
4820-01-151-3925INTERCHANGEABLE
CAP,VALVE
6651
6530-01-199-1989INTERCHANGEABLE
DRAPE,SURGICAL
7000042934
8415-01-667-5606INTERCHANGEABLE
GLOVE,SHOOTER'S
6651
5340-01-707-1814INTERCHANGEABLE
DEFLECTOR,DIRT AND LIQUID
6651

Frequently Asked Questions

What is NSN 4820-00-758-7156?

NSN 4820-00-758-7156 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 4820-00-758-7156?

NSN 4820-00-758-7156 has 3 cross-referenced part numbers: 6184-23 (Air Dry Co of America, Llc), 104231-G (Admiral Valve Llc Dba Cpv Manufacturing), 665-1 (Admiral Valve Llc Dba Cpv Manufacturing).

What NSN replaces 4820-00-758-7156?

There are 11 known substitutes for 4820-00-758-7156: 5133-00-084-4348, 5970-00-224-5227, 4720-00-319-1229 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 665-1?

Key specifications for 665-1: Thread Direction: LEFT-HAND ALL ENDS; Maximum Operating Temp: 225.0 FAHRENHEIT SINGLE RESPONSE DEGF; Thread Quantity Per Inch: 10 ALL ENDS; Operating Pressure: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 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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