Wood Screws

หมวด: Machine Screw


 

Wood Screws


Head:

 Pan Head, Flat Head

Color:

 Blue Zinc, Yellow Zinc,Black Oxide

Table1 Dimensions of Threads and Body Diameters for Wood Screws

Nominal Size or Basic Screw Diameter
Threads Per Inch
D
E
E1
F
Thread Major Diameter
Body Diameter (Cut Thread)
Body Diameter (Rolled Thread)
Thread Depth
Max
Min
Max
Min
Max
Min
Min
0
0.060
32
0.064
0.053
0.064
0.053
0.055
0.044
0.010
1
0.073
28
0.077
0.066
0.077
0.066
0.066
0.055
0.010
2
0.086
26
0.090
0.079
0.090
0.079
0.075
0.064
0.010
3
0.099
24
0.103
0.092
0.103
0.092
0.086
0.075
0.014
4
0.112
22
0.116
0.105
0.116
0.105
0.095
0.084
0.016
5
0.125
20
0.129
0.118
0.129
0.118
0.107
0.096
0.018
6
0.138
18
0.142
0.131
0.142
0.131
0.118
0.107
0.020
7
0.151
16
0.155
0.144
0.155
0.144
0.127
0.116
0.022
8
0.164
15
0.168
0.157
0.168
0.157
0.136
0.125
0.023
9
0.177
14
0.181
0.170
0.181
0.170
0.147
0.136
0.026
10
0.190
13
0.194
0.183
0.194
0.183
0.157
0.146
0.030
12
0.216
11
0.220
0.209
0.220
0.209
0.176
0.165
0.031
14
0.242
10
0.246
0.235
0.246
0.235
0.201
0.190
0.035
16
0.268
9
0.272
0.261
0.272
0.261
0.214
0.203
0.035
18
0.294
8
0.298
0.287
0.298
0.287
0.237
0.226
0.042
20
0.320
8
0.324
0.313
0.324
0.313
0.260
0.249
0.046
24
0.372
7
0.376
0.365
0.376
0.365
0.303
0.292
0.050
See Notes
1.5
2

Notes:

  1. Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
  2. The maximum permissible variation in the number of threads per inch shall be plus or minus 10 percent of that which is tabulated for the respective screw size.
  3. Cut thread type screws are usually supplied with single lead threads for all screw lengths.
  4. Rolled thread type screws may be supplied with either single lead or double lead threads at the option of the manufacturer, however, single lead threads are preferred where the nominal length of the screw is shorter than four times the basic screw diameter. Points be sharp, however, no extrusion of excess material beyond the apex of point resulting from thread rolling shall be permissible.




 

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