[toyman]

Odd, below was your post on spirol and roll pins?

1/4" roll/spirol pins correspond to a 1/4" hole. They are slightly oversized to fit the hole tightly. Spirol pins are stronger and are used in the driveshaft on all IH Cub Cadets. Roll pins are used in applications where a bit less strength is required. Bigger roll pins are pretty strong...the later 82 series tractors use 3/8" roll pins on the lift rockshaft.