Drill Bit

Bottoming

Chamfer

Pipe

Size Thread

Type Threads

Per Inch Thread

Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Each

Uncoated High-Speed Steel

1/16 PTF-SAE 27 11/16" 2 1/8" C 0.242" 4 2553A11 $27.62

1/8 PTF-SAE 27 3/4" 2 1/8" Q 0.332" 4 2553A12 27.62

1/4 PTF-SAE 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2553A13 30.45

3/8 PTF-SAE 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2553A14 40.28

1/2 PTF-SAE 14 1 3/8" 3 1/8" 45/64" 0.7031" 4 2553A15 63.72

3/4 PTF-SAE 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2553A16 89.26

1 PTF-SAE 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2553A17 133.28

1 1/4 PTF-SAE 11 1/2 1 3/4" 4" 1 31/64" 1.4844" 5 2553A18 194.00

1 1/2 PTF-SAE 11 1/2 1 3/4" 4 1/4" 1 23/32" 1.7188" 7 2553A19 260.32

2 PTF-SAE 11 1/2 1 3/4" 4 1/4" 2 3/16" 2.1875" 7 2553A21 352.43

Titanium Nitride (TiN) Coated High-Speed Steel

1/16 PTF-SAE 27 11/16" 2 1/8" C 0.242" 4 2553A31 31.08

1/8 PTF-SAE 27 3/4" 2 1/8" Q 0.332" 4 2553A32 35.81

1/4 PTF-SAE 18 1 1/16" 2 7/16" 7/16" 0.4375" 4 2553A33 39.43

3/8 PTF-SAE 18 1 1/16" 2 9/16" 9/16" 0.5625" 4 2553A34 52.11

1/2 PTF-SAE 14 1 3/8" 3 1/8" 45/64" 0.7031" 4 2553A35 79.06

3/4 PTF-SAE 14 1 3/8" 3 1/4" 29/32" 0.9063" 5 2553A36 110.73

1 PTF-SAE 11 1/2 1 3/4" 3 3/4" 1 9/64" 1.1406" 5 2553A37 167.54

1 1/4 PTF-SAE 11 1/2 1 3/4" 4" 1 31/64" 1.4844" 5 2553A38 311.27

1 1/2 PTF-SAE 11 1/2 1 3/4" 4 1/4" 1 23/32" 1.7188" 7 2553A39 310.00

2 PTF-SAE 11 1/2 1 3/4" 4 1/4" 2 3/16" 2.1875" 7 2553A41 411.43