Model: H421

Restrictor Check Valve

Properties:

Thread Class
3a 2nd end
Thread Class
3a 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Aperture Diameter
0.095 inches
Flow Control Device
Poppet
Disk Loading Method
Spring
Connection Style
Flareless 1st end
Connection Style
Flareless 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded external tube 1st end
Connection Type
Threaded external tube 2nd end
Mounting Position
Horizontal or vertical
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.562 inches 2nd end
Thread Size
0.750 inches 1st end
Seat Angle
12.0 degrees 1st end
Seat Angle
12.0 degrees 2nd end
Material
Stainless steel
Media For Which Designed
Fuel/oil, hydrocarbon single response
Surface Treatment
Passivate
Style Designator
Straight thru
Thread Series Designator
Unf 1st end
Thread Series Designator
Unf 2nd end
NSN
4820-00-173-7379
Part Number
H421
Description
Valve,restrictor Check
CAGE
06239

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

Part H421 NSN 4820-00-173-7379

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
20520
FIIG:
A530B0
Concept No.:
1
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
127220
UFC:
64490
LTL:
77.5
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481302090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of steel

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