Normal Size or
Basic Major Dia of Thread

F

G

H

T

S

Runout Of
Bearing
Surface
FIM

Width Across Flats

Width Across Corners

Thickness

Unslotted
Thickness

Width of Slot

Basic

Max

Min

Max

Min

Basic

Max

Min

Max

Mmin

Max

Min

Max

9/16
11/16
3/4

0.562
0.688
0.750

0.551
0.675
0.736

0.650
0.794
0.866

0.628
0.768
0.840

21/64
3/8
7/16

0.337
0.385
0.448

0.320
0.365
0.427

0.21
0.23
0.29

0.19
0.21
0.27

0.15
0.15
0.18

0.12
0.12
0.15

0.018
0.018
0.019

15/16
1-1/8
1-5/16

0.938
1.125
1.312

0.922
1.088
1.269

1.083
1.299
1.516

1.051
1.240
1.447

35/64
41/64
3/4

0.559
0.665
0.776

0.535
0.617
0.724

0.34
0.40
0.52

0.32
0.38
0.49

0.24
0.24
0.24

0.18
0.18
0.18

0.021
0.023
0.025

1-1/2
1-11/16
1-7/8
2-1/4

1.500
1.688
1.875
2.250

1.450
1.631
1.812
2.175

1.732
1.949
2.165
2.598

1.653
1.859
2.066
2.480

55/64
31/32
1-1/16
1-9/32

0.887
0.999
1.094
1.317

0.831
0.939
1.030
1.245

0.59
0.64
0.70
0.86

0.56
0.61
0.67
0.82

0.30
0.33
0.40
0.46

0.24
0.24
0.31
0.37

0.027
0.030
0.033
0.039

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