0.050" hole diameter 1.604" outside diameter 120 bolt hole quantity packing made from mil-spec part number M23431/10-062; hole pattern/arrangement per electric boat retainer plate part number EB4922/12-003 or EB4922/21-003 which are identical
1.604" outside diameter packing made from mil-spec part number M23431/10-062; hole pattern/arrangement per electric boat retainer plate part number EB4922/5-003