Tap And Drill Chart Page 3
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1
2
3Tap and Drill Chart
(Recommended tap drill to use for 75% depth of thread)
800-871-5022
To Tap this Size Screw
Use This
(Closest
Decimal
More information can be found at
Or Bolt:
Drill Bit:
Fractional:)
Inches
1.12 NF
59/64"
59/64"
.9219
1-14 NS
15/16"
15/16"
.9375
1 1/8-7 NC
63/64"
63/64"
.9844
1 1/8-12 NF
1 3/64"
1 3/64"
1.0469
1 1/4-7 NC
1 7/64"
1 7/64"
1.1094
1 1/4-12 NF
1 11/64"
1 11/64"
1.1719
1 3/8-6 NC
1 7/32"
1 7/32"
1.2188
1 3/8-12 NF
1 19/64"
1 19/64"
1.2969
1 1/2-6 NC
1 11/32"
1 11/32"
1.3438
1 1/2"-12 NF
1 27/64"
1 27/64"
1.4219
*These Sizes Are Spark Plug Taps
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