Inch

Thread

Drill Bit

Through-Hole Threading

Closed-End Hole Threading

Size Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Thread

Type Pitch

Dia. Limit Chamfer

Type Each Chamfer

Type Each

Black Oxide Cobalt Steel

2-56 3/8" 1 3/4" 51 ga. 0.067" 2 UNC H2 Plug 2684A61 $24.34 __ ______ __

2-56 13/32" 1 3/4" 51 ga. 0.067" 2 UNC H2 __ ______ __ Bottoming 27055A11 $36.36

3-48 7/16" 1 13/16" 47 ga. 0.0785" 2 UNC H2 Plug 2684A62 19.44 __ ______ __

4-40 1/2" 1 7/8" 43 ga. 0.089" 2 UNC H2 Plug 2684A29 15.96 Bottoming 27055A31 23.88

4-48 1/2" 1 7/8" 42 ga. 0.0935" 2 UNF H2 Plug 2684A63 15.96 __ ______ __

4-48 17/32" 1 7/8" 42 ga. 0.0935" 2 UNF H2 __ ______ __ Bottoming 27055A32 23.88

5-40 19/32" 1 15/16" 38 ga. 0.1015" 2 UNC H2 Plug 2684A64 15.96 Bottoming 27055A33 23.88

6-32 3/8" 2" 36 ga. 0.1065" 2 UNC H3 Plug 2684A31 13.38 Bottoming 27055A34 19.00

6-40 3/8" 2" 33 ga. 0.113" 2 UNF H3 Plug 2684A65 13.38 Bottoming 27055A35 19.00

8-32 3/8" 2 1/8" 29 ga. 0.136" 2 UNC H3 Plug 2684A32 13.38 __ ______ __

8-32 3/8" 2 1/8" 29 ga. 0.136" 3 UNC H3 __ ______ __ Bottoming 27055A36 19.00

8-36 3/8" 2 1/8" 29 ga. 0.136" 2 UNF H2 Plug 2684A84 13.38 __ ______ __

10-24 1/2" 2 3/8" 25 ga. 0.1495" 2 UNC H3 Plug 2684A33 13.38 __ ______ __

10-24 1/2" 2 3/8" 25 ga. 0.1495" 3 UNC H3 __ ______ __ Bottoming 27055A37 19.44

10-32 1/2" 2 3/8" 21 ga. 0.159" 2 UNF H3 Plug 2684A34 13.38 __ ______ __

10-32 1/2" 2 3/8" 21 ga. 0.159" 3 UNF H3 __ ______ __ Bottoming 27055A38 19.44

12-24 1/2" 2 3/8" 16 ga. 0.177" 2 UNC H3 Plug 2684A66 14.84 __ ______ __

12-24 1/2" 2 7/16" 16 ga. 0.177" 3 UNC H3 __ ______ __ Bottoming 27055A39 21.46

12-28 1/2" 2 3/8" 15 ga. 0.18" 2 UNF H3 Plug 2684A67 14.84 __ ______ __

12-28 1/2" 2 7/16" 15 ga. 0.18" 3 UNF H3 __ ______ __ Bottoming 27055A41 21.46

1/4"-20 5/8" 2 1/2" 7 ga. 0.201" 3 UNC H3 Plug 2684A35 14.84 Bottoming 27055A42 21.46

1/4"-28 5/8" 2 1/2" 3 ga. 0.213" 3 UNF H3 Plug 2684A36 14.84 Bottoming 27055A43 21.46

5/16"-18 11/16" 2 23/32" F 0.257" 3 UNC H3 Plug 2684A37 16.56 Bottoming 27055A44 23.88

5/16"-24 11/16" 2 23/32" I 0.272" 3 UNF H3 Plug 2684A38 16.56 Bottoming 27055A45 23.88

3/8"-16 3/4" 2 15/16" 5/16" 0.3125" 3 UNC H3 Plug 2684A39 18.86 Bottoming 27055A46 26.62

3/8"-24 3/4" 2 15/16" Q 0.332" 3 UNF H3 Plug 2684A41 18.86 Bottoming 27055A47 26.62

7/16"-14 7/8" 3 5/32" U 0.368" 3 UNC H3 Plug 2684A68 24.34 Bottoming 27055A48 38.90

7/16"-20 7/8" 3 5/32" 25/64" 0.3906" 3 UNF H3 Plug 2684A69 24.34 Bottoming 27055A49 38.90

1/2"-13 15/16" 3 3/8" 27/64" 0.4219" 3 UNC H3 Plug 2684A71 28.04 Bottoming 27055A51 47.34

1/2"-20 15/16" 3 3/8" 29/64" 0.4531" 3 UNF H3 Plug 2684A72 28.04 Bottoming 27055A52 47.34

9/16"-12 1" 3 19/32" 31/64" 0.4844" 3 UNC H3 Plug 2684A85 43.50 __ ______ __

9/16"-18 1" 3 19/32" 33/64" 0.5156" 3 UNF H3 Plug 2684A86 43.50 __ ______ __

5/8"-11 1 3/32" 3 13/16" 17/32" 0.5313" 3 UNC H3 Plug 2684A75 50.94 Bottoming 27055A55 78.88

5/8"-18 1 3/32" 3 13/16" 37/64" 0.5781" 3 UNF H3 Plug 2684A76 50.94 Bottoming 27055A56 78.88

3/4"-10 1 7/32" 4 1/4" 21/32" 0.6563" 3 UNC H3 Plug 2684A77 80.00 __ ______ __

3/4"-10 1 7/32" 4 1/4" 21/32" 0.6563" 4 UNC H3 __ ______ __ Bottoming 27055A57 101.88

3/4"-16 1 7/32" 4 1/4" 11/16" 0.6875" 3 UNF H3 Plug 2684A78 80.00 __ ______ __

3/4"-16 1 7/32" 4 1/4" 11/16" 0.6875" 4 UNF H3 __ ______ __ Bottoming 27055A58 101.88

7/8"-9 1 11/32" 4 11/16" 49/64" 0.7656" 3 UNC H4 Plug 2684A79 103.92 __ ______ __

7/8"-9 1 11/32" 4 11/16" 49/64" 0.7656" 4 UNC H4 __ ______ __ Bottoming 27055A59 151.12

7/8"-14 1 11/32" 4 11/16" 13/16" 0.8125" 3 UNF H4 Plug 2684A81 103.92 __ ______ __

7/8"-14 1 11/32" 4 11/16" 13/16" 0.8125" 4 UNF H4 __ ______ __ Bottoming 27055A61 151.12

1"-8 1 1/2" 5 1/8" 7/8" 0.875" 3 UNC H5 Plug 2684A82 141.60 __ ______ __

1"-8 1 1/2" 5 1/8" 7/8" 0.875" 4 UNC H5 __ ______ __ Bottoming 27055A62 198.32

1"-12 1 1/2" 5 1/8" 59/64" 0.9219" 3 UNF H4 Plug 2684A83 141.60 __ ______ __

1"-12 1 1/2" 5 1/8" 59/64" 0.9219" 4 UNF H5 __ ______ __ Bottoming 27055A63 198.32

Metric

Thread

Drill Bit

Through-Hole Threading

Closed-End

Hole Threading

Size Pitch,

mm Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Pitch

Dia. Limit Chamfer

Type Each Chamfer

Type Each

Black Oxide Cobalt Steel

M3 0.5 19/32" 1 15/16" 2.5 mm 0.0984" 2 D3 Plug 2671A71 $19.52 Plug 8296A21 $30.28

M3.5 0.6 3/8" 2" 2.9 mm 0.1142" 2 D4 Plug 2671A81 17.36 Plug 8296A22 27.99

M4 0.7 3/8" 2 1/8" 3.3 mm 0.1299" 2 D4 Plug 2671A72 17.36 __ ______ __

M4 0.7 3/8" 2 1/8" 3.3 mm 0.1299" 3 D4 __ ______ __ Plug 8296A23 27.99

M5 0.8 1/2" 2 3/8" 4.2 mm 0.1653" 2 D4 Plug 2671A73 17.36 __ ______ __

M5 0.8 1/2" 2 3/8" 4.2 mm 0.1653" 3 D4 __ ______ __ Plug 8296A24 27.99

M6 1 5/8" 2 1/2" 5 mm 0.1968" 3 D5 Plug 2671A74 17.36 Plug 8296A25 27.99

M7 1 11/16" 2 23/32" 6 mm 0.2362" 3 D5 Plug 2671A82 19.52 Plug 8296A26 30.28

M8 1 11/16" 2 23/32" 6.9 mm 0.2716" 3 D5 Plug 2671A83 19.52 Plug 8296A27 30.28

M8 1.25 11/16" 2 23/32" 6.7 mm 0.2637" 3 D5 Plug 2671A75 19.52 Plug 8296A28 30.28

M10 1.25 3/4" 2 15/16" 8.7 mm 0.3425" 3 D5 Plug 2671A84 27.11 Plug 8296A29 42.77

M10 1.5 3/4" 2 15/16" 8.5 mm 0.3346" 3 D6 Plug 2671A76 27.11 Plug 8296A31 42.77

M12 1.25 15/16" 3 3/8" 10.8 mm 0.4251" 3 D5 __ ______ __ Plug 8296A32 51.47

M12 1.25 15/16" 3 3/8" 10.8 mm 0.4251" 3 D6 Plug 2671A85 32.46 __ ______ __

M12 1.75 15/16" 3 3/8" 10.2 mm 0.4015" 3 D6 Plug 2671A77 32.46 Plug 8296A33 51.47

M14 1.5 1" 3 19/32" 12.5 mm 0.4921" 3 D6 Plug 2671A86 44.97 __ ______ __

M14 2 1" 3 19/32" 12 mm 0.4724" 3 D7 Plug 2671A87 48.30 __ ______ __

M16 1.5 1 3/32" 3 13/16" 14.5 mm 0.5709" 3 D6 Plug 2671A88 58.58 __ ______ __

M16 2 1 3/32" 3 13/16" 14 mm 0.5512" 3 D7 Plug 2671A89 58.58 __ ______ __

M18 1.5 1 3/32" 4 1/32" 16.5 mm 0.6496" 3 D6 Plug 2671A91 82.25 __ ______ __

M18 2.5 1 7/32" 4 1/32" 15.5 mm 0.6102" 3 D7 Plug 2671A92 82.25 __ ______ __

M20 1.5 1 7/32" 4 15/32" 18.5 mm 0.7283" 3 D6 Plug 2671A11 126.61 __ ______ __

M20 2.5 1 7/32" 4 15/32" 17.5 mm 0.689" 3 D7 Plug 2671A12 120.59 __ ______ __

M22 1.5 1 7/32" 4 11/16" 20.5 mm 0.8071" 3 D6 Plug 2671A13 140.30 __ ______ __

M22 2.5 1 7/32" 4 11/16" 19.5 mm 0.7677" 3 D7 Plug 2671A14 133.61 __ ______ __

M24 3 1 7/32" 4 29/32" 21 mm 0.8268" 3 D8 Plug 2671A16 178.38 __ ______ __

M30 1.5 1 7/32" 5 7/16" 28.5 mm 1.122" 4 D6 Plug 2671A19 384.73 __ ______ __

M30 3.5 1 7/32" 5 7/16" 26.5 mm 1.0433" 4 D9 Plug 2671A21 378.79 __ ______ __