The Web's best Machine Design Guide for Mechanical Engineers and Designers            


NOTE: You are not currently logged in, login, or register to assure full site access.
Reference data you can use, a standard tap drill chart, in inches and milimeters. TAP DRILL SIZE CHART FOR STANDARD THREADS
American Standard Thread ...... ISO Metric Thread
Thread Size Tap Drill Size (in.) Thread Size Tap Drill Size(mm)
0-80 3/64 M1 x 0.25 0.75
1-64 53 M1.1 x 0.25 0.85
1-72 53 M1.2 x 0.25 0.95
2-56 51 M1.4 x 0.3 1.10
2-64 50 M1.6 x 0.35 1.25
3-48 5/64 M1.8 x 0.35 1.45
3-56 46 M2 x 0.4 1.60
4-40 43 M2.2 x 0.45 1.75
4-48 42 M2.5 x 0.45 2.05
5-40 39 M3 x 0.5 2.50
Thread Size Tap Drill Size (in.) ...... Thread Size  Tap Drill Size(mm)
5-44 37 M3.5 x 0.6 2.90
6-32 36 M4 x 0.7 3.30
6-40 33 M4.5 x 0.75 3.70
8-32 29 M5 x 0.8 4.20
8-36 29 M6 x 1 5.00
10-24 25 M7 x 1 6.00
10-32 21 M8 x 1.25 6.80
12-24 17 M9 x 1.25 7.80
12-28 15 M10 x 1.5 8.50
1/4-20 7 M11 x 1.5 9.50
Thread Size Tap Drill Size (in.) ...... Thread Size  Tap Drill Size(mm)
1/4-28 3 M12 x 1.75 10.20
5/16-18 F M14 x 2 12.00
5/16-24 I M16 x 2 14.00
3/8-16 5/16 M18 x 2.5 15.50
3/8-24 Q M20 x 2.5 17.50
7/16-14 U M22 x 2.5 19.50
7/16-20 W M24 x 3 21.00
1/2-13 27/64 M27 x 3  24.00
1/2-20 29/64 M30 x 3.5 26.50
9/16-12 31/64 M33 x 3.5 29.50
Thread Size Tap Drill Size (in.) ...... Thread Size  Tap Drill Size(mm)
9/16-18 33/64 M36 x 4 32.00
5/8-11 17/32 M39 x 4 35.00
5/8-18 37/64 M42 x 4.5 37.50
3/4-10 21/32 M45 x 4.5 40.50
3/4-16 11/16 M48 x 5 43.00
7/8-9 49/64 M52 x 5 47.00
7/8-14 13/16 M56 x 5.5 50.50
1"-8 7/8 M60 x 5.5 54.50
1"-12 59/64 M64 x 6 58.00
M68 x 6 62.00






Follow Us on LinkedIn:
Member Status: Visitor | Non Premium Access
Logout of this Membership
Reset Your Password | Remove From Mailing List
E-mail us | Advertise here | About this site
Privacy statement | Disclaimer
Copyright 2024 iCrank.com All Rights Reserved.
You may not duplicate or redistribute in any form without prior written consent.