Model: 4R121-123

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

Flow Control Device

Poppet

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

Thready Qty Per Inch (tpi)

18 1st end

Thready Qty Per Inch (tpi)

20 2nd end

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 1st end

Seat Angle

12.0 degrees 2nd end

Outside Diameter Tube Accommodated

0.250 inches 2nd end

Outside Diameter Tube Accommodated

0.375 inches 1st end

Media For Which Designed

Hydraulic fluid, phosphate-ester base single response

Surface Treatment

Passivate

Style Designator

Straight thru

Thread Series Designator

Unjf 2nd end

Thread Series Designator

Unjf 1st end

NSN

4820-00-283-1181

Part Number

4R121-123

Description

Valve,restrictor Check

CAGE

82829

Part 4R121-123 NSN 4820-00-283-1181

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:

0.3000lbs

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 4820-00-283-1181 is a component of

Viking S-3b Aircraft

Pricing & Availability Check

Submit this form for stock availability and pricing.

How to Order

Ordering from buyaircraftparts.com

If you would like to order this restrictor check valve (NSN 4820-00-283-1181) please submit the pricing and availability form above to receive an up to date quote by email. If you agree to the pricing and terms you can e-sign your order online!

We are pleased to have the opportunity to serve you.

Have a Question

Hours:	08:00-18:00 Eastern Standard Time
Phone:	+1 470-231-0824
Email:	Contact Form »