Harris Torch tip sizes and thickness of metal that can be welded

Tip	hole size
0	#75
1	#65
2	#61
3	#58
4	#55
5	#53
6	#51
7	#48
8	#45
9	#43
10	#40
13	#35

THE HARRIS PRODUCTS GROUP 1390,23A90, 5090 & 8490 WELDING, BRAZING TIP FLOW CHART ACETYLENE
Welding Tip Chart

Thickness	Hole Size
1/64"	#76
1/32"	#72
1/16"	#68
3/32"	#62
1/8"	#56
3/16"	#54
1/4"	#51
5/16"	#48
3/8"	#44
1/2"	#40
5/8"	#35
3/4"	#30

Welding Tip Size Comparison Chart