Threads - Charts of all Types of Threads


JIC/AN Thread Table

JIC is an abbreviation for Joint Industry Council.
AN is an abbreviation for American Army.

JIC Size Code Thread Size Thread Pitch
-03 3/8" UNF 24 TPI
-04 7/16" UNF 20 TPI
-06 9/16" UNF 18 TPI
-08 3/4" UNF 16 TPI
-10 7/8" UNF 14 TPI
-12 1-1/16" UNF 12 TPI
-16 15/16" UNF 12 TPI
-20 1-5/8" UNF 12 TPI

Metric Thread Chart

Metric thread for tapping chart

Size (ISO) Pitch (mm) Metric Drill Size (mm) Imperial Drill Size (inches)
M3 0.35 Fine
0.5 Standard		 2.65
2.5
M3.5 0.35 Fine
0.6 Standard		 3.15
2.9
M4 0.5 Fine
0.7 Standard		 3.5
3.3
M4.5 0.5 Fine
0.75 Standard		 4
3.7
M5 0.5 Fine
0.8 Standard		 4.5
4.2
M6 0.75 Fine
1 Standard		 5.2
5
M7 0.75 Fine
1 Standard		 6.2
6.2		  
15/64
M8 0.75 Fine
1 Standard
1.25 Coarse		 7.2
7
6.8		  
 
17/64
M9 0.75 Fine
1 Standard
1.25 Coarse		 8.2
8
7.8
M10 1 Fine
1.25 Standard
1.5 Coarse		 9
8.8
8.5		  
11/32
 
M11 1 Fine
1.5 Standard		 10
9.5
M12 1
1.25
1.5
1.75		 11
10.8
10.5
10.2		  
 
27/64
 
M14 1.5 Fine
2 Standard		 12.7
12.7		  
 
M16 1.5Fine
2 Standard		 14.7
14.2		  
35/64

Boring Stuff

Disclaimer: Use this information as guidance only - none of it may even be correct. It is a collection of data I've found whilst trawling the web, none of it is my own work so unfortunately I can't take credit for it or when you order something or tap a thread to the wrong diameter/pitch as a result of any random numbers in tables above.