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NSN: 4820-00-001-6553
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Cross Reference These part numbers have the same form, fit, and function of a51k56028-1

Item Number Cage
A51K56028-1 61174

Characteristic Codes A51K56028-1 spec. code meanings

Code Translation
AHNC The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.
AWLS Indicates the type of connection/s/.
ADSU The means of closing the item when inlet pressure decreases.
CBBL Those features, not otherwise specified, which may be required for proper functioning of the item.
ADQU The part that controls the flow through the item.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
CWFD The nominal length of a straight line which passes through the center of the accommodated tube, and terminates at the outside circumference.
CQJX A designation that is used for the purpose of general identification of the thread.
STYL The style designation indicating the configuration that most nearly corresponds to the appearance of the item.
AAJD A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
AAJF The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
THSD A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
AQLR The means used to control the operation of the valve.

A51K56028-1 Safety Relief Valve

Mfr. Cage 61174

Specification

Thread Size: 1-1/8"

AHNC Connection Style
External seat for gasket seal (boss) 1st end
AWLS Connection Type
Threaded external boss 1st end
ADSU Disk Loading Method
Spring
CBBL Features Provided
Pressure tight outlet side
ADQU Flow Control Device
Poppet
MATT Material
Steel
CWFD Nominal Outside Diameter Tube Accommodated
0.875 inches 1st end
CQJX Nominal Thread Size
1.187 inches 1st end
STYL Style Designator
Straight thru
AAJD Thread Class
3a 1st end
AAJF Thread Direction
Right-hand 1st end
CMLP Thready Qty Per Inch (tpi)
16 1st end
THSD Thread Series Designator
Unj 1st end
AQLR Valve Operation Method
Automatic

Technical Definition

Valve, Safety Relief, also referenced with federal logistics item name code 05488 - 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.
National Stock Number (NSN) 4820-00-001-6553

Last Modified: 02/14/2017