Inch

Thread

Drill Bit

Plug Chamfer

Size Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Thread

Type Pitch

Dia. Limit Each

Uncoated High-Speed Steel

6-32 11/16" 2" 36 ga. 0.1065" 3 UNC H11 2535A11 $7.51

8-32 3/4" 2 1/8" 29 ga. 0.136" 3 UNC H11 2535A12 7.65

10-24 7/8" 2 3/8" 25 ga. 0.1495" 3 UNC H11 2535A13 7.86

10-32 7/8" 2 3/8" 21 ga. 0.159" 3 UNF H11 2535A23 7.86

1/4"-20 1" 2 1/2" 7 ga. 0.201" 4 UNC H11 2535A14 10.04

1/4"-28 1" 2 1/2" 3 ga. 0.213" 4 UNF H11 2535A33 10.04

5/16"-18 1 1/8" 2 23/32" F 0.257" 4 UNC H11 2535A15 11.27

5/16"-24 1 1/8" 2 23/32" I 0.272" 4 UNF H11 2535A34 11.27

3/8"-16 1 1/4" 2 15/16" 5/16" 0.3125" 4 UNC H11 2535A16 11.84

3/8"-24 1 1/4" 2 15/16" Q 0.332" 4 UNF H11 2535A35 11.84

7/16"-14 1 7/16" 3 5/32" U 0.368" 4 UNC H11 2535A19 18.63

7/16"-20 1 7/16" 3 5/32" 25/64" 0.3906" 4 UNF H11 2535A21 18.63

1/2"-13 1 21/32" 3 3/8" 27/64" 0.4219" 4 UNC H11 2535A17 22.11

1/2"-20 1 21/32" 3 3/8" 29/64" 0.4531" 4 UNF H11 2535A36 22.11

5/8"-11 1 13/16" 3 13/16" 17/32" 0.5313" 4 UNC H11 2535A18 43.81

Metric

Thread

Drill Bit

Plug Chamfer

Size Pitch,

mm Lg. Overall

Lg. Size Decimal Size

Equivalent No. of

Flutes Thread

Type Pitch

Dia. Limit Each

Uncoated High-Speed Steel

M3 0.5 5/8" 1 15/16" 2.5 mm 0.098" 3 Metric H11 2535A411 $12.43

M3.5 0.6 11/16" 2" 2.9 mm 0.114" 3 Metric H11 2535A412 10.29

M4 0.7 3/4" 2 1/8" 3.3 mm 0.13" 4 Metric H11 2535A413 10.29

M5 0.8 7/8" 2 3/8" 4.2 mm 0.165" 4 Metric H11 2535A414 10.29

M6 1 1" 2 1/2" 5.0 mm 0.197" 4 Metric H11 2535A415 11.37

M8 1.25 1 1/8" 2 23/32" 6.75 mm 0.266" 4 Metric H11 2535A416 12.74

M10 1.5 1 1/4" 2 15/16" 8.5 mm 0.335" 4 Metric H11 2535A417 21.12

M12 1.75 1 21/32" 3 3/8" 10.25 mm 0.404" 4 Metric H11 2535A418 25.07