"1999.03.16" . "Recorded" . "API 610 BASE PLATE NUMBER 12" . "u20735" . "API 610 BASE PLATE NUMBER 12" . "RDS886724" . "API 610 - Appendix M" . "9459000" . "An API 610 base plate with 5 holes per side, and the following dimensions (mm): A= 1550 (13), B=2755 (+/-25), C=1225 (+/-3), D=615 (+/-3), E=1475 (+/-3), F=165 (+/-13). Figure M-1 in appendix M illustrates the dimensions." . .