Michigan-Drill-Catalog

THREADING 227 List No. 770H – Optional Thread Limits List No. 770F – Optional Flutes List No. 770HF – Optional Thread Limits and Flutes Price Each Size Threads Per Inch Thread Limits No. of Flutes Chamfer Available Opt. Thread 770H Opt. Flute 770F Opt. Thread. & Flt. 770HF 1/4 20 H5 4 P,T,B 7.74 — — 1/4 28 H1 3 P,T — — 8.01 1/4 28 H1 4 P,T,B 7.79 — — 1/4 28 H2 3 P — — 8.01 1/4 28 H2 4 P,T,B 8.10 — — 1/4 28 H3 2 P,T,B — 8.10 — 1/4 28 H3 3 P,T,B — 8.10 — 1/4 28 H4 3 P,T,B — — 8.01 1/4 28 H4 4 P,T,B 8.10 — — 1/4 28 H5 4 P,T,B 8.10 — — 5/16 18 H1 3 P,T,B — — 9.00 5/16 18 H1 4 P,T,B 9.14 — — 5/16 18 H2 4 P,T,B 9.14 — — 5/16 18 H3 2 P,T,B — 10.17 — 5/16 18 H3 3 P,T,B — 9.00 — 5/16 18 H4 4 P,T,B 9.00 — — 5/16 18 H5 2 P,T,B --- --- 9.00 5/16 18 H5 3 P,T,B --- --- 9.00 5/16 18 H5 4 P,T,B 9.00 — — 5/16 18 H7 4 P,T 9.00 — — 5/16 18 H9 2 P,T,B — — 9.00 5/16 24 H1 4 P,T,B 9.00 — — 5/16 24 H2 3 P,T,B — — 9.00 5/16 24 H2 4 P,T,B 9.00 — — 5/16 24 H3 2 P,T,B — 9.00 — 5/16 24 H3 3 P,T,B — 9.00 — 5/16 24 H4 3 P,T — — 9.00 5/16 24 H4 4 P,T,B 9.00 — — 5/16 24 H5 4 P 9.00 — — 3/8 16 H1 3 P,T,B — — 11.70 3/8 16 H1 4 P,T,B 11.70 — — 3/8 16 H2 3 P — — 11.70 3/8 16 H2 4 P,T,B 10.22 — — 3/8 16 H3 3 P,T,B — 10.17 — 3/8 16 H5 3 P,T,B — — 11.70 3/8 16 H5 4 P,T,B 10.22 — — 3/8 16 H8 3 P,T — — 11.70 3/8 24 H1 4 P,T,B 11.70 — — 3/8 24 H2 3 P,T,B — — 11.70 3/8 24 H2 4 P,T,B 10.71 — — 3/8 24 H3 3 P,T,B — 11.70 — 3/8 24 H4 3 P,T,B — — 11.70 3/8 24 H4 4 P,T,B 10.22 — — 3/8 24 H5 4 P,T.B 10.22 — — 3/8 24 H8 3 B — — 11.70 7/16 14 H1 4 P,T,B 17.01 — — 7/16 14 H2 4 P,T,B 17.01 — — 7/16 14 H3 3 P,T,B — 17.01 — 7/16 14 H5 3 P,T,B — — 17.01 7/16 14 H5 4 P,T,B 17.01 — — 7/16 20 H1 3 P,T,B — — 17.01 7/16 20 H1 4 P,T,B 17.01 — — 7/16 20 H2 4 P,T,B 17.01 — — 7/16 20 H3 3 P,T — 17.01 — 7/16 20 H4 4 P,T,B 17.01 — — High Speed Steel – Ground Thread Optional Thread Limits & Flutes Hand Taps Hand taps are the most commonly used general purpose taps. They are recommended for tapping free machining steels, stainless steels, aluminum, zinc and ductile material. Hand taps are utilized in either through or blind hole tapping. Please specify plug, bottoming, or taper chamfer when ordering. Continued on Next Page 

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