A low or medium carbon steel, externally threaded Mechanical device 1/4" diameter or larger, with a rectangular head with rounded top surface and a flat bearing surface. Used in Machine tool and water works industries.
|
Nominal
Size
|
E
|
A
|
B
|
H
|
K
|
R
|
|
Body
Diameter
|
Head
Length
|
Head
Width
|
Head
Height
|
Head
Radius
|
Fillet
Radius
|
|
Max
|
Min
|
Max
|
Min
|
Max
|
Min
|
Max
|
Min
|
Max
|
Max
|
|
1/4 .250
|
.260
|
.237
|
.500
|
.488
|
.280
|
.245
|
.204
|
.172
|
.438
|
.031
|
|
5/16 .3125
|
.324
|
.298
|
.625
|
.609
|
.342
|
.307
|
.267
|
.233
|
.500
|
.031
|
|
3/8 .3750
|
.388
|
.360
|
.750
|
.731
|
.405
|
.368
|
.331
|
.295
|
.625
|
.031
|
|
7/16 .4375
|
.452
|
.421
|
.875
|
.853
|
.468
|
.431
|
.394
|
.356
|
.875
|
.031
|
|
1/2 .5000
|
.515
|
.483
|
1.000
|
.975
|
.530
|
.492
|
.458
|
.418
|
.875
|
.031
|
|
5/8 .6250
|
.642
|
0.605
|
1.250
|
1.218
|
.675
|
.616
|
.585
|
.541
|
1.062
|
.062
|
|
3/4 .7500
|
.768
|
0.729
|
1.500
|
1.462
|
.800
|
.741
|
.649
|
.601
|
1.250
|
.062
|
|
7/8 .8750
|
.895
|
0.852
|
1.750
|
1.706
|
.938
|
.865
|
.776
|
.724
|
1.375
|
.062
|
|
1 1.0000
|
1.022
|
0.976
|
2.000
|
1.950
|
1.063
|
.990
|
.903
|
.847
|
1.500
|
.062
|
