Here's the OEM numbers:
Bellhousing to Block:
91212-51232 - Bolt - Qty 6
94512-01200 - Washer - Qty 6
Trans to Bellhousing:
91619-61240 - Qty 4
For further understanding....using the ORIGINAL part number will tell you what the dimensions are:
-51232 = a tensile strength/bolt head marking...