Thread

Drill Bit

Right Hand

Left Hand

Size Lg. Overall Lg. Size Decimal Size

Equivalent No. of

Flutes Pitch

Dia. Limit Each Each

Uncoated High-Speed Steel

1/4"-16 1 3/4" 3" 10 ga. 0.1935" 4 2G 25345A41 $94.23 25345A43 $94.23

3/8"-12 2 1/8" 4 1/16" 7.6 mm 0.2992" 4 2G 25345A42 102.31 25345A44 102.31

7/16"-12 2 9/16" 5" 23/64" 0.3594" 4 2G 25345A93 123.85 25345A94 123.85

1/2"-10 2 9/16" 5" 13/32" 0.4063" 4 2G 25345A55 102.31 25345A45 102.31

5/8"-8 3 3/16" 6 1/4" 13 mm 0.5118" 4 2G 25345A56 125.19 25345A46 125.19

5/8"-10 3 3/16" 6 1/4" 17/32" 0.5313" 4 2G 25345A11 140.00 25345A47 140.00

3/4"-5 4 5/16" 7 15/16" 14.5 mm 0.5709" 4 2G 25345A14 179.04 25345A48 179.04

3/4"-6 4 5/16" 7 15/16" 39/64" 0.6094" 4 2G 25345A57 160.19 25345A49 160.19

3/4"-8 4 5/16" 7 15/16" 41/64" 0.6406" 4 2G 25345A17 188.46 25345A51 188.46

3/4"-10 4 5/16" 7 15/16" 21/32" 0.6563" 4 2G 25345A21 179.04 25345A52 179.04

3/4"-16 4 5/16" 7 15/16" 11/16" 0.6875" 4 2G 25345A35 229.17 25345A38 229.17

7/8"-6 4 3/8" 8 5/8" 47/64" 0.7344" 4 2G 25345A59 188.04 25345A53 188.04

1"-4 5 1/4" 10 1/8" 49/64" 0.7656" 4 2G 25345A24 234.23 25345A54 234.23

1"-5 5 1/4" 10 1/8" 21 mm 0.8268" 4 2G 25345A61 208.65 25345A58 208.65

1"-6 5 1/4" 10 1/8" 53/64" 0.833" 4 2G 25345A34 256.17 25345A37 256.17

1"-8 5 1/4" 10 1/8" 7/8" 0.875" 4 2G 25345A96 234.23 25345A97 234.23

1"-10 5 1/4" 10 1/8" 29/32" 0.9063" 4 2G 25345A27 234.23 25345A66 234.23

1 1/8"-5 5 1/4" 10 3/4" 24 mm 0.9449" 4 2G 25345A62 226.47 25345A81 226.47

1 1/4"-4 5 1/4" 11 1/8" 1 1/64" 1.0156" 4 2G 25345A31 277.25 25345A82 277.25

1 1/4"-5 5 1/4" 11 1/8" 1 5/64" 1.0781" 4 2G 25345A63 244.31 25345A91 244.31

1 3/8"-4 5 7/8" 12 1/4" 1 9/64" 1.1406" 4 2G 25345A83 270.58 25345A89 270.58

1 1/2"-4 5 7/8" 12 5/8" 32 mm 1.2598" 4 2G 25345A65 322.55 25345A92 316.35

1 1/2"-5 5 7/8" 12 5/8" 1 19/64" 1.3" 4 2G 25345A36 535.00 25345A39 535.00

Metric Trapezoidal

Thread

Drill Bit

Right Hand

Size Pitch,

mm Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Pitch

Dia. Limit Each

Uncoated High-Speed Steel

M10 2 2.56" 5 1/8" 8 mm 0.315" 3 H7 3200N11 $185.17

M12 3 2.56" 5 1/8" 9 mm 0.3543" 3 H7 3200N12 176.83

M14 3 3.15" 6 5/16" 11 mm 0.4331" 4 H7 3200N13 212.33

M16 4 3.15" 6 5/16" 12 mm 0.4724" 4 H7 3200N14 221.33

M18 4 4.33" 7 7/8" 14 mm 0.5512" 4 H7 3200N15 270.17

M20 4 4.33" 8 3/4" 16 mm 0.6299" 4 H7 3200N16 302.00

M22 5 4.33" 8 3/4" 17 mm 0.6693" 4 H7 3200N17 336.67

M24 5 5.31" 10 1/4" 19 mm 0.748" 4 H7 3200N18 385.67

M26 5 5.31" 10 1/4" 21 mm 0.8268" 4 H7 3200N19 416.67