I'm a cheapskate. Plain and simple. So, without any serious intent to put anyone out of business, specifically our sponsors here at OCC, I'm sharing my substitute for the 1/4" spiral pins listed by Cub Cadet for driveshafts.
I didn't want to just use roll pins in place of spiral pins, they're a risk. So, I inserted (hammered) a 5/32" roll pin into a 1/4" roll pin which virtually doubles the thinkness of the pins which brings their shear strength closer to that of the spiral pin. Also, since both pins will still compress, I had NO trouble at all driving these "modified" pins into the 1/4" holes in my CRS driveshaft. I feel safer using these than a single roll pin.
The 5/32" pins retail at $0.23 each, the 1/4" roll pins retail for $0.31 each... The spiral pins retail for as much as $5.00 each. Cheaper, yes... and likely just as strong.
Now, if I could just find a suitable substitute for work...