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 TABLE 4-2. Welding Tip Counterbore Schedule
Tip Drill Size
Counterbore Drill
Tip Drill Size
Counterbore Drill
52
76
52
36
74
51
50
34
50
72
48
33
70
49
46
32
68
44
48
31
47
42
66
30
46
40
64
29
45
62
28
38
44
60
27
36
58
43
26
34
56
42
32
25
54
39
30
24
4-8
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