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Drill Patterns

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Drill Patterns
STANDARD ROUND ASA150 SQUARE
SIZE AA BB CC DD EE FF
IST15 0.687" 9.25" .875" 9.50" .437" 8.25"
IST20 0.687" 11.02" .875" 11.75" .437" 10"
IST25 0.875" 14.00" 1.00" 14.25" .562" 12.50"
IST30 0.687" 14.96" 1.00" 17.00" .562" 14.50"
IST35 0.866" 19.53" 1.125" 18.75" .562" 16.50"
IST40 0.875" 19.53" 1.125" 21.25" .750" 18.75"

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