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Safety Relief Valve NSN 4820-00-066-3908

Item Description

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

NSN 4820-00-066-3908 NSN: 4820-00-066-3908

Features and Characteristics

Thread Class
3b 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Connection Style
Gasket sea (boss) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded internal boss 2nd end
Thread Size
0.437 inches 2nd end
Seat Angle
12.0 degrees 1st end
Opening Pressure Setting
70.0 pounds per square inch
Outside Diameter Tube Accommodated
0.250 inches 2nd end
Material
Steel comp 303 seat
Style Designator
Straight through note: to be used for valve bodies of separable sections.
Thread Series Designator
Unjf 1st end
Reference Number Differentiating Characteristics
As differentiated by navord od 42046
FSC
4820 Nonpowered Valves
NIIN
000663908
NSN
4820000663908

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
1977090
Cage Code:
10001
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8481400000
  • NAICS: 332911
  • SITC: 74740
  • Description: Safety or relief valves
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-00-066-3908
What are the manufacturers of nsn 4820000663908?
Does this nsn 4820000663908 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820000663908
A valve designed to automatically release excessive pressures. it is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. it is not designed for regulation of continuously fluctuating loads. it may be inline or cartridge (manifold) design. excludes valve (1), relief, pressure and temperature.
Does nsn 4820000663908 contain any precious metals?
Precious metal content is unknown.
Does nsn 4820000663908 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820000663908?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
05488
FIIG:
A046B0
App. Key:
AP
Cond. Code:
1
Status:
A

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