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NSN: 4310-00-001-3493
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Part Numbers

Item Number Item Description
290963D Vacuum Pump, Rotary

Master Requirement Codes

Code Translation
AAYX Indicates the type of connection between the prime mover and the shaft.
ABEM Consists of plating, dip, and/or coating that cannot be wiped off. plating and/or coating is any chemical and/or metallic additive, electrochemical, or mild mechanical process which protects a body surface.
AEPJ The length of a straight line passing through the center of the discharge connection, with terminated points on the inside circumference.
AAYV The number of discharge connections included on the item.
AAYW Indicates the type of discharge connection included on the item.
AAXX Indicates the type of mount utilized to support the item.
ABKW The distance measured in a straight line from the bottom to the top of an item.
AENE The element, compound, or mixture of which the pump body is fabricated, excluding any surface treatment.
AAYT The number of intake connections included on the item.
ASWT Designates the thread diameter, series/type, and number of threads per measurement scale of the intake connection.
AAYU Indicates the type of intake connection included on the item.
ABHP The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.
ABMK An overall measurement taken at right angles to the length of an item, in distinction from thickness.
AENG Indicates the type of pumping element included on the item.
AAYD The number of stages incorporated in the item.
AERP An indication of the system for which the item is designed.

290963D Rotary Vacuum Pump

Cage 1ML14

Technical Definition

Vacuum Pump, Rotary, also referenced with federal logistics item name code 29903 - A vacuum pump used to create extremely low pressure by means of a rotating element(s) in an enclosure. it is designed to be driven manually or by a prime mover which is not an integral part of the pump. it may include a vacuum storage tank(s) and various peripheral components such as driven pulleys.

Technical Characteristics

Drive Connection Type (AAYX):
Single strand v-belt
Body Surface Treatment (ABEM):
Black oxide
Discharge Connection Inside Diameter (AEPJ):
0.500 inches nominal
Discharge Connection Quantity (AAYV):
Discharge Connection Type (AAYW):
Unthreaded internal
Mounting Type (AAXX):
Overall Height (ABKW):
6.000 inches nominal
Pump Body Material (AENE):
Iron, cast
Intake Connection Quantity (AAYT):
Intake Connection Thread Size And Series/type Designator (ASWT):
1/2-14 npt
Intake Connection Type (AAYU):
Threaded internal
Overall Length (ABHP):
9.000 inches nominal
Overall Width (ABMK):
4.750 inches nominal
Pumping Element Type (AENG):
Sliding vane
Stage Quantity (AAYD):
System Design (AERP):

National Stock Number (NSN)