PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

816-3Valve,regulating,fluid Pressure

Aqua Environment Co, Inc · NSN 4820-01-678-0009 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-678-0009 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-678-0009. Primary manufacturer part number: 816-3.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Media for Which Designed: AIR
  • Material: ALUMINUM AND COPPER ALLOY BODY
  • Nondefinitive Spec/std Data: VALVE SIZE 1/4 INCH FNPT SIZE IN
  • 1 verified cross-reference
  • Primary manufacturer: Aqua Environment Co, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Aluminum and Copper Alloy Body construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-678-0009, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Aqua Environment Co, Inc. Government technical data includes 3 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-678-0009
Primary Part Number816-3
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAqua Environment Co, Inc
StatusACTIVE
Media for Which DesignedAIR
MaterialALUMINUM AND COPPER ALLOY BODY
Nondefinitive Spec/std DataVALVE SIZE 1/4 INCH FNPT SIZE IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5945-00-056-493219360-6 INTERCHANGEABLE
Solenoid,electrical
Hickok Waekon Llc
5915-00-080-2338 INTERCHANGEABLE
Filter,radio Frequency Interfere
5330-00-136-2502 INTERCHANGEABLE
Gasket
5307-00-254-0638R78164VX03005 INTERCHANGEABLE
Stud,plain
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
6685-00-526-8241909/25.5 INTERCHANGEABLE
Transmitter,temperature,electric
Isothermal /usa/ Ltd
4730-00-585-7496 INTERCHANGEABLE
Adapter,straight,tube to Hose
6685-00-945-1869 INTERCHANGEABLE
Thermocouple,immersion
5960-00-997-5634 INTERCHANGEABLE
Electron Tube
5130-01-104-5335 INTERCHANGEABLE
Wheel,abrasive
6145-01-340-1305GW8013 INTERCHANGEABLE
Cable,special Purpose,electrical
General Wire Products, Inc. Dba General Wire Products Inc
Cross-Reference Index
Part NumberManufacturer
816-3 PRIMARY Aqua Environment Co, Inc (USA)
Related Parts
5945-00-056-4932INTERCHANGEABLE
SOLENOID,ELECTRICAL
19360-6
5915-00-080-2338INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
5330-00-136-2502INTERCHANGEABLE
GASKET
5307-00-254-0638INTERCHANGEABLE
STUD,PLAIN
R78164VX03005
6685-00-526-8241INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC
909/25.5
4730-00-585-7496INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
6685-00-945-1869INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
5960-00-997-5634INTERCHANGEABLE
ELECTRON TUBE
5130-01-104-5335INTERCHANGEABLE
WHEEL,ABRASIVE
6145-01-340-1305INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
GW8013
5935-01-432-2141INTERCHANGEABLE
GUIDE,ELECTRICAL CONNECTOR
5340-01-462-7546INTERCHANGEABLE
SPRING GUIDE ASSY
741300-K1

Frequently Asked Questions

What is NSN 4820-01-678-0009?

NSN 4820-01-678-0009 is a Valve,regulating,fluid Pressure, manufactured by Aqua Environment Co, Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-678-0009?

NSN 4820-01-678-0009 has 1 cross-referenced part number: 816-3 (Aqua Environment Co, Inc).

What NSN replaces 4820-01-678-0009?

There are 12 known substitutes for 4820-01-678-0009: 5945-00-056-4932, 5915-00-080-2338, 5330-00-136-2502 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 816-3?

Key specifications for 816-3: Media for Which Designed: AIR; Special Features: ROUND DIAMETER 2 INCHES; IN; Overall Length: 9.0 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: AIR OPERATED OPEN/CLOSE VALVE. 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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