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Stop-check Valve NSN 4820-00-457-0256

Item Description

A valve with a bolt or stem that may be mechanically actuated to two different positions by rotary or linear motion. In the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. In the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. The valve disk may be spring loaded. It may be inline or cartridge (manifold) design. See also valve (1), lift-check and valve (1), stop-lift-check.

NSN 4820-00-457-0256 NSN: 4820-00-457-0256

Features and Characteristics

Thread Class
2b 2nd end
Thread Direction
Right-hand all ends
Flow Control Device
Disk
Bonnet Type
Inside screw
Bonnet Attachment Method
Threaded
Connection Style
Flare (tube) 2nd end
Valve Operation Method
Manual
Connection Type
Threaded internal tube 2nd end
Mounting Facility
Bracket
Mounting Position
Horizontal or vertical
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.438 inches all ends
Seat Angle
37.0 degrees 1st end
Outside Diameter Tube Accommodated
0.250 inches 2nd end
Material
Aluminum alloy flow control device and aluminum flow control device
Media For Which Designed
Oil, hydraulic 2nd response
Style Designator
Angle
Test Data Document
81349-mil-v-5528 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unf all ends
FSC
4820 Nonpowered Valves
NIIN
004570256
NSN
4820004570256

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
S6165-20510-1
Cage Code:
78286
Status:
A
MSDS:
Part Number:
S6165-20510-001
Cage Code:
78286
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 8481309000
  • NAICS: 332911
  • SITC: 74730
  • Description: Check valves of materials other than copper, iron or steel
  • End Use (Code 21180):
    Industrial machines, other

Q & A

Frequently asked questions for NSN 4820-00-457-0256
What are the manufacturers of nsn 4820004570256?
Does this nsn 4820004570256 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 4820004570256
A valve with a bolt or stem that may be mechanically actuated to two different positions by rotary or linear motion. in the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. in the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. the valve disk may be spring loaded. it may be inline or cartridge (manifold) design. see also valve (1), lift-check and valve (1), stop-lift-check.
Does nsn 4820004570256 contain any precious metals?
Precious metal content is unknown.
Does nsn 4820004570256 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 4820004570256?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
05486
FIIG:
A530B0
App. Key:
Cond. Code:
2
Status:
A

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