Model: 4R121-105

Restrictor Check Valve

Properties:

Thread Class

3a all ends

Thread Direction

Right-hand all ends

Flow Control Device

Poppet

Maximum Operating Temp

-65.0 degrees fahrenheit 1st response

Maximum Operating Temp

275.0 degrees fahrenheit 2nd response

Connection Style

Flareless all ends

Valve Operation Method

Automatic

Connection Type

Threaded external tube all ends

Mounting Position

Horizontal or vertical

Maximum Operating Pressure

3000.0 pounds per square inch single response

Thread Size

0.438 inches 2nd end

Thread Size

0.562 inches 1st end

Seat Angle

12.0 degrees all ends

Material

Steel comp 630

Media For Which Designed

Hydraulic fluid, phosphate-ester base single response

Surface Treatment

Passivate

Style Designator

Straight thru

Thread Series Designator

Unjf all ends

NSN

4820-00-283-3822

Part Number

4R121-105

Description

Valve,restrictor Check

CAGE

82829

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 4R121-105 NSN 4820-00-283-3822

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

20520

FIIG:

A530B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

0.2000lbs

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

051080

UFC:

29300

LTL:

RATING VARIABLE

LCL:

WCC:

576

TCC:

SHC:

ACC:

Construction Materials

End Items End applications NSN 4820-00-283-3822 is a component of

Viking S-3b Aircraft
Sh-60b Lamps Mark Iii Helicopter
Orion P-3 Aircraft
H-60 Seahawk Helicopter

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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