MACHINE SCREW NUT

Nominal Diameter & Thread Size
F
C
H
ACROSS
FLATS
ACROSS
CORNERS
THICKNESS
max
min
min
max
max
min
0
0.0600
0.150
0.156
0.171
0.180
0.043
0.050
1
0.0730
0.150
0.156
0.171
0.180
0.043
0.050
2
0.0860
0.180
0.188
0.205
0.217
0.057
0.066
3
0.0990
0.180
0.188
0.205
0.217
0.057
0.066
4
0.1120
0.241
0.250
0.275
0.289
0.087
0.098
5
0.1250
0.302
0.312
0.344
0.361
0.102
0.114
6
0.1380
0.302
0.312
0.344
0.361
0.102
0.114
8
0.1640
0.332
0.344
0.378
0.397
0.117
0.130
10
0.1900
0.362
0.375
0.413
0.433
0.117
0.130
12
0.2160
0.423
0.438
0.482
0.505
0.148
0.161
1/4
0.2500
0.423
0.438
0.482
0.505
0.178
0.193
5/16
0.3125
0.545
0.562
0.621
0.650
0.208
0.225
3/8
0.3750
0.607
0.625
0.692
0.722
0.239
0.257

Note: Square nuts are also available. They have the same Across Flats and thickness dimensions as the Machine Screw Nut dimensions referenced above.
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