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

Nominal I.D. (inches)

N/A 1/4

Nominal O.D. (inches)

N/A 5/8

Nominal C/S (inches)

N/A 3/16

I.D. (inches)

N/A 0.250

O.D. (Inches)

N/A .625
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