Size

Body Diameter

Width Across Flats

Width Across Corners

Head Height

Thread Length

1/4

.245 - .250

.428 - .438

.488 - .505

.150 - .163

.750

5/16

.3065 - .3125

.489 - .500

.557 - .577

.195 - .211

.875

3/8

.369 - .375

.551 - .562

.628 - .650

.226 - .243

1.00

7/16

.4305 - .4375

.612 - .625

.698 - .722

.272 - .291

1.125

1/2

.439 - .500

.736 - .750

.840 - .866

.302 - .323

1.25

9/16

.5545 - .5625

.798 - .812

.910 - .938

.348 - .371

1.375

5/8

.617 - .625

.922 - .938

1.051 - 1.083

.378 - .403

1.50

3/4

.741 - .750

1.100 - 1.125

1.254 - 1.299

.455 - .483

1.75

7/8

.866 - .875

1.285 - 1.312

1.465 - 1.516

.531 - .563

2.00

1"

.990 - 1.00

1.469 - 1.500

1.675 - 1.732

.591 - .627

2.25

1-1/4

1.239 - 1.250

1.812 - 1.875

2.066 - 2.165

.749 - .813

2.75

1-1/2

1.488 - 1.500

2.175 - 2.250

2.480 - 2.598

.902 - .974

3.25