PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

23905Valve,check

Electro Impulse Laboratory Inc Dba Electro Impulse Inc · NSN 4820-01-291-1375 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-291-1375 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-291-1375. Primary manufacturer part number: 23905.
Features
  • Valve,check — FSC 4820
  • Style Designator: STRAIGHT THRU
  • Mounting Position: HORIZONTAL OR VERTICAL
  • Disk Loading Method: SPRING
  • Valve Operation Method: AUTOMATIC
  • Flow Control Device: DISK
  • Thread Series Designator: UNF ALL ENDS
  • Operating Pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
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 4820-01-291-1375, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Electro Impulse Laboratory Inc Dba Electro Impulse Inc. Government technical data includes 15 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-291-1375
Primary Part Number23905
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectro Impulse Laboratory Inc Dba Electro Impulse Inc
StatusACTIVE
Style DesignatorSTRAIGHT THRU
Mounting PositionHORIZONTAL OR VERTICAL
Disk Loading MethodSPRING
Valve Operation MethodAUTOMATIC
Flow Control DeviceDISK
Thread Series DesignatorUNF ALL ENDS
Operating Pressure500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Thread Size0.500 INCHES ALL ENDS IN
Seat Angle37.0 DEGREES ALL ENDS
MaterialCOPPER ALLOY BODY
Connection TypeTHREADED EXTERNAL TUBE ALL ENDS
Connection StyleFLARED (TUBE) ALL ENDS
Thread DirectionRIGHT-HAND ALL ENDS
Maximum Operating Temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
Thread Class2A ALL ENDS A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-205-560711912 INTERCHANGEABLE
Caster,swivel
Aerol Llc
5930-00-228-6955 INTERCHANGEABLE
Switch,thermostatic
5910-00-233-4874 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
6130-00-262-0419 INTERCHANGEABLE
Rectifier,electropl
4940-00-274-3026 INTERCHANGEABLE
Degreaser
5305-00-297-837123905 INTERCHANGEABLE
Setscrew
Triumph Engine Control Systems Llc
4720-00-322-532811912 INTERCHANGEABLE
Hose Assembly,nonmetallic
Mine Safety Appliances Company
5815-00-602-2764SM-C-426581 INTERCHANGEABLE
Bar,t,teletypewriter
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5905-00-621-179711912 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Clayton Manufacturing Company
4730-00-906-7922 INTERCHANGEABLE
Sleeve,compression,tube-Hose Fit
Cross-Reference Index
Part NumberManufacturer
23905 PRIMARY Electro Impulse Laboratory Inc Dba Electro Impulse Inc (USA)
119 1/2 Henry Technologies, Inc. (USA)
Related Parts
5340-00-205-5607INTERCHANGEABLE
CASTER,SWIVEL
11912
5930-00-228-6955INTERCHANGEABLE
SWITCH,THERMOSTATIC
5910-00-233-4874INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
6130-00-262-0419INTERCHANGEABLE
RECTIFIER,ELECTROPL
4940-00-274-3026INTERCHANGEABLE
DEGREASER
5305-00-297-8371INTERCHANGEABLE
SETSCREW
23905
4720-00-322-5328INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
11912
5815-00-602-2764INTERCHANGEABLE
BAR,T,TELETYPEWRITER
SM-C-426581
5905-00-621-1797INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
11912
4730-00-906-7922INTERCHANGEABLE
SLEEVE,COMPRESSION,TUBE-HOSE FIT
1680-00-918-1636INTERCHANGEABLE
LEVER,WHEEL ADJUSTI
7345115
5340-00-929-6356INTERCHANGEABLE
CASTER,SWIVEL
11912

Frequently Asked Questions

What is NSN 4820-01-291-1375?

NSN 4820-01-291-1375 is a Valve,check, manufactured by Electro Impulse Laboratory Inc Dba Electro Impulse Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-291-1375?

NSN 4820-01-291-1375 has 2 cross-referenced part numbers: 23905 (Electro Impulse Laboratory Inc Dba Electro Impulse Inc), 119 1/2 (Henry Technologies, Inc.).

What NSN replaces 4820-01-291-1375?

There are 12 known substitutes for 4820-01-291-1375: 5340-00-205-5607, 5930-00-228-6955, 5910-00-233-4874 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 23905?

Key specifications for 23905: Style Designator: STRAIGHT THRU; Mounting Position: HORIZONTAL OR VERTICAL; Disk Loading Method: SPRING; Valve Operation Method: AUTOMATIC. 15 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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