An off-register is the misalignment of two o-ring halves, caused by the lateral shift of one mold cavity plate relative to the other. A mismatch occurs when the cross sectional radius of one half ring is unequal to that of the other half, caused by a dimensional difference in the mold halves.
|Specification||Max Allowable Off-Register Length (inches)**||Max Allowable Mismatch Length (inches)**|
|ISO 3601-3 CS||.0016||.0016|
|ISO 3601-3 S, DIN 3771 S||.0031||.0031|
|ISO 3601-3 N, DIN 3771 N||.0031||.0031|
|RMA OR-1 A||.003||.003|
|RMA OR-1 B||.003||.003|
** Data above shows maximum allowable Length of Mismatch/Off-Register assuming an O-ring cross sectional diameter between 0 and .1 inches.