PAI AN U-Cups are made to the dimensions of Military Drawing AN 6226.
Unit of Measure

Nominal I.D. (inches)

N/A 3

Nominal O.D. (inches)

N/A 3 3/4

Nominal C/S (inches)

N/A 3/8

I.D. (inches)

N/A 3.000

O.D. (Inches)

N/A 3.750
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