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TAP DRILL SIZES FOR ACME TAPS
Recommended tap drill sizes (for appx. 90% thread) for Acme Taps
provided by:
VICTOR MACHINERY EXCHANGE, INC.
12155 Stephens Road, Warren, MI 48089-3962
Call Toll Free: (800) 723-5359
Shop online at www.victornet.com

Call or email us for all Acme Taps
For anything but a standard size tandem tap, please specify:
1. Diameter and threads per inch
2. Material you are cutting
3. Through hole or blind hole
4. The length of the thread to be cut
5. Right hand or left hand thread
 
Standard Acme Tap Sizes
TAP SIZE DRILL SIZE DRILL SIZE(approximate)
3/8 - 12 .300" N
7/16 - 12 .3625 9.2mm
1/2 - 10 .410 10.4mm
5/8 - 8 .5125 13mm
3/4 - 6 .600 39/64
7/8 - 6 .725 23/32
1" - 5 .820 13/16
1-1/8 - 5 .945 15/16
1-1/4 - 5 1.070 1-5/64
1-1/2 - 4 1.275 1-9/32
Follow this link to order right hand and left hand tandem acme taps.
Check out Victor Machinery's extensive selection of taps and dies.

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Victor Machinery Exchange
12155 Stephens Road
Warren, MI 48089-3962

Email: for all Customer Service, Information, Quote Requests, etc.:
sales@victornet.com

Phone: (800) 723-5359