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TAPPING SCREWS (SHEET METAL SCREWS)


Tapping Screw
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Unit: U.S. Inches      Metric
Size:
Length:

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Sizes Usually Available            
#2 TAPPING SCREWS     
#3 TAPPING SCREWS     
#4 TAPPING SCREWS     
#5 TAPPING SCREWS     
#6 TAPPING SCREWS     
#7 TAPPING SCREWS     
#8 TAPPING SCREWS     
#10 TAPPING SCREWS     
#12 TAPPING SCREWS     
#14 TAPPING SCREWS     
1/4 TAPPING SCREWS     
5/16 TAPPING SCREWS     
3/8 TAPPING SCREWS     

Metric Sizes Usually Available            
M2.2      
M2.9      
M3.5      
M3.9      
M4.2      
M4.8      
M5.5      
M6.3      
Lengths Usually Available            
3/16 in.     
1/4 in.     
5/16 in.     
3/8 in.     
7/16 in.     
1/2 in.     
9/16 in.     
5/8 in.     
11/16 in.     
3/4 in.     
7/8 in.     
1 in.     
1 1/8 in.     
1 1/4 in.     
1 3/8 in.     
1 1/2 in.     
1 5/8 in.     
1 3/4 in.     
2 in.     
2 1/4 in.     
2 1/2 in.     
2 3/4 in.     
3 in.     
3 1/2 in.     
4 in.     
5 in.     
- in.     

Metric Lengths Usually Available            
16MM      
22MM      
25MM      
45MM      
50MM      
32MM      
4.5MM      
-      

Suggested Hole Sizes for Types A, AB, and B Tapping Screws

Nominal
Screw Size
Hole Diameter
Closest Drill Size to
Mean Hole Diameter
Max
Mean
Min
Drill size
Drill Dia
0 - 48
0.049
0.046
0.043
56
0.0465
1 - 42
0.063
0.059
0.055
53
0.0595
2 - 32
0.077
0.072
0.067
49
0.073
3 - 28
0.090
0.084
0.078
45
0.082
4 - 24
0.103
0.096
0.089
41
0.096
5 - 20
0.114
0.107
0.100
36
0.1065
6 - 20
0.124
0.116
0.108
32
0.116
7 - 19
0.138
0.129
0.120
30
0.1285
8 - 18
0.148
0.138
0.128
29
0.136
10 - 16
0.170
0.159
0.148
21
0.159
12 - 14
0.194
0.182
0.169
14
0.182
1/4 - 14
0.226
0.211
0.196
4
0.209
5/16 - 12
0.289
0.270
0.251
I
0.272
3/8 - 12
0.356
0.333
0.310
Q
0.332
7/16 - 10
0.413
0.386
0.359
W
0.386
1/2 - 10
0.480
0.449
0.418
29/64
0.4531

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