Earl,
I searched the ebatmus web site. They don't list the Torrington brand but list other. Check here:
http://www.ebatmus.com/search.epl?Query=HK-0306
I wonder which one is correct.
Boca Bearing list this one:
http://www.bocabearings.com/main1.as...720&n=HK0306TN
I am not sure what TN means at the end,
Thanks,
Vince