PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21020Valve,solenoid

Rocker Solenoid Co Dba Rocker Solenoid Co · NSN 4810-00-688-9939 · FSC 4810 · No Item Name Available
Verified by PartsTable
NSN 4810-00-688-9939 — this item is cataloged by the U.S. Government under National Stock Number 4810-00-688-9939. Primary manufacturer part number: 21020.
Features
  • Valve,solenoid — FSC 4810
  • Aperture Diameter: 2.063 INCHES MINIMUM AND 2.563 INCHES MAXIMUM IN
  • Maximum Operating Temp: 570.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Valve Operation Method: SOLENOID
  • Material: STEEL CORROSION RESISTING BODY
  • Connection Style: PLAIN (TUBE) FIRST END
  • Mounting Position: HORIZONTAL
  • Connection Type: UNTHREADED EXTERNAL TUBE FIRST END
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Valve,solenoid, cataloged under National Stock Number 4810-00-688-9939, is classified within Federal Supply Class 4810 (No Item Name Available) of the Valves group. The primary manufacturer of record is Rocker Solenoid Co Dba Rocker Solenoid Co. 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
NSN4810-00-688-9939
Primary Part Number21020
Item NameValve,solenoid
FSC / FSG4810 / 48 — No Item Name Available
ManufacturerRocker Solenoid Co Dba Rocker Solenoid Co
StatusACTIVE
Aperture Diameter2.063 INCHES MINIMUM AND 2.563 INCHES MAXIMUM IN
Maximum Operating Temp570.0 FAHRENHEIT SINGLE RESPONSE DEGF
Valve Operation MethodSOLENOID
MaterialSTEEL CORROSION RESISTING BODY
Connection StylePLAIN (TUBE) FIRST END
Mounting PositionHORIZONTAL
Connection TypeUNTHREADED EXTERNAL TUBE FIRST END
MaterialSTEEL CORROSION RESISTING SEAT
Media for Which DesignedAIR SINGLE RESPONSE
Voltage in Volts and Current Type30.0 DC AND 18.0 DC
Style DesignatorSTRAIGHT THRU
Operating Pressure145.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Outside Diameter Tube Accommodated2.500 INCHES FIRST END IN
Flow Control DevicePOPPET
Flow Control Device Normal Operation PositionCLOSED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5120-00-061-854421020 INTERCHANGEABLE
Hammer,hand
Nupla Corporation
4730-00-278-2523 INTERCHANGEABLE
Clamp,hose
7045-00-316-54575198GS INTERCHANGEABLE
Reel,magnetic Recording Tape
E D P Products Inc
4820-00-603-869621020 INTERCHANGEABLE
Valve,check
Mission Systems Orchard Park Inc
2805-00-624-0265210201 INTERCHANGEABLE
Elbow,intake
Briggs and Stratton Corp
5985-00-633-0231 INTERCHANGEABLE
Attenuator,fixed
5905-00-702-0523 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
5935-00-847-9683952141-1 INTERCHANGEABLE
Adapter,connector
Raytheon Company Dba Raytheon Co
4820-01-142-5193 INTERCHANGEABLE
Valve,operator
5365-01-240-06082-1020 INTERCHANGEABLE
Ring,externally Threaded
Malabar
Cross-Reference Index
Part NumberManufacturer
21020 PRIMARY Rocker Solenoid Co Dba Rocker Solenoid Co (USA)
21020-1 Rocker Solenoid Co Dba Rocker Solenoid Co (USA)
Related Parts
5120-00-061-8544INTERCHANGEABLE
HAMMER,HAND
21020
4730-00-278-2523INTERCHANGEABLE
CLAMP,HOSE
7045-00-316-5457INTERCHANGEABLE
REEL,MAGNETIC RECORDING TAPE
5198GS
4820-00-603-8696INTERCHANGEABLE
VALVE,CHECK
21020
2805-00-624-0265INTERCHANGEABLE
ELBOW,INTAKE
210201
5985-00-633-0231INTERCHANGEABLE
ATTENUATOR,FIXED
5905-00-702-0523INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5935-00-847-9683INTERCHANGEABLE
ADAPTER,CONNECTOR
952141-1
4820-01-142-5193INTERCHANGEABLE
VALVE,OPERATOR
5365-01-240-0608INTERCHANGEABLE
RING,EXTERNALLY THREADED
2-1020
5998-01-295-6003INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21014
5970-01-298-3310INTERCHANGEABLE
APEX INSULATOR ASSEMBLY
21020

Frequently Asked Questions

What is NSN 4810-00-688-9939?

NSN 4810-00-688-9939 is a Valve,solenoid, manufactured by Rocker Solenoid Co Dba Rocker Solenoid Co, classified under FSC 4810 (No Item Name Available). Status: active.

What are the part numbers for NSN 4810-00-688-9939?

NSN 4810-00-688-9939 has 2 cross-referenced part numbers: 21020 (Rocker Solenoid Co Dba Rocker Solenoid Co), 21020-1 (Rocker Solenoid Co Dba Rocker Solenoid Co).

What NSN replaces 4810-00-688-9939?

There are 12 known substitutes for 4810-00-688-9939: 5120-00-061-8544, 4730-00-278-2523, 7045-00-316-5457 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21020?

Key specifications for 21020: Aperture Diameter: 2.063 INCHES MINIMUM AND 2.563 INCHES MAXIMUM IN; Maximum Operating Temp: 570.0 FAHRENHEIT SINGLE RESPONSE DEGF; Valve Operation Method: SOLENOID; Material: STEEL CORROSION RESISTING BODY. 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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