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NSN: 2815-00-005-7530
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Part Numbers

Item Number Item Description
280505AU Piston, Internal Combustion Engin

Master Requirement Codes

Code Translation
AXPK The distance from the center of the pin hole to the extreme top of the item.
BQBL An indication of whether or not a carbon groove is included.
AXFW A measurement between specified points of a cut, in distinction from height.
ABMZ The length of a straight line which passes through the center of a circular figure or body, and terminates at the circumference.
AXPM The distance between pin bosses on an item.
AXFR The finished size by which the item is commercially known and designated.
AASK The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
AXPH An indication of whether or not an oil groove/s/ is included.
ACXM Indicates the type of oil passage included on the item.
ABKW The distance measured in a straight line from the bottom to the top of an item.
AXPN An indication of whether or not a retaining ring groove(s) is included.
AXGD The length of a straight line which passes through the center of a ring groove, and terminates at the circumference.
AXGE The below piston pin ring groove position on the item.
AXFZ The number of ring grooves included on the item.
AXGB A measurement taken at right angles to the length of a ring groove, in distinction from thickness.
AXGB A measurement taken at right angles to the length of a ring groove, in distinction from thickness.
AXPR An indication of whether or not a ring(s) is included.
AXFX An indication of whether or not a skirt bottom cutaway feature is included.
AXFT Indicates the type of skirt included on the item.
AXPL An indication of whether or not a pin hole bushing/s/ is included.
AXPQ Indicates the type of pin for which the item is designed.
ACXU The length of a straight line which passes through the center of a pinhole, and terminates at the circumference.
AXPP An indication of whether or not a pin is included.
WGHT A relative measure of the mass of an item with respect to its density.
AGYE An additional finishing process by which the surface of an item is altered in respect to polishing, grinding, and the like.

280505AU Internal Combustion Engin Piston

Cage 66289

Technical Definition

Piston, Internal Combustion Engin, also referenced with federal logistics item name code 16509

Technical Characteristics

Distance From Pin Hole Center To Extreme Top (AXPK):
2.160 inches nominal
Carbon Groove (BQBL):
Not included
Cut Depth (AXFW):
0.375 inches nominal
Diameter (ABMZ):
3.375 inches nominal
Distance Between Pin Bosses (AXPM):
1.375 inches nominal
Finished Size Designation (AXFR):
Standard
Head Style (AASK):
Flat
Material (MATT):
Aluminum alloy
Oil Groove (AXPH):
Not included
Oil Passage Type (ACXM):
Hole
Overall Height (ABKW):
3.938 inches nominal
Retaining Ring Groove (AXPN):
Included
Ring Groove Diameter (AXGD):
3.045 inches nominal
Ring Groove Position Below Piston Pin (AXGE):
Number 4 ring groove located below pin bosses
Ring Groove Quantity (AXFZ):
4
Ring Groove Width (AXGB):
0.1000 inches nominal 1st ring
Ring Groove Width (AXGB):
0.1560 inches nominal 4th ring
Ring (AXPR):
Included
Skirt Bottom Cutaway Feature (AXFX):
Included
Skirt Type (AXFT):
Solid
Pin Hole Bushing (AXPL):
Not included
Pin Type For Which Designed (AXPQ):
Floating
Pinhole Diameter (ACXU):
1.1800 inches nominal
Pin (AXPP):
Included
Weight (WGHT):
24.0 ounces
Surface Finish (AGYE):
Finished

National Stock Number (NSN)

2815-00-005-7530