drill size decimal equivalent & tap drill chart - Imperial Supplies LLC 1.04 .0410. 58. 1.07 .0420. 57. 1.09 .0430. 56. 1.18 .0465. 3/64. 1.19 .0469. 55. 1.32 .0520. 54. 1.40 .0550. DRILL. DECIMAL. SIZE. MM. EQUIVALENT. 53. 1.51.
