ASME B18.10 Oval Neck Track Bolts

Dimensions of Dimensions of ASME B18.10 Oval Neck Track Bolts

Nominal
Diameter
and
Threads
per Inch,
D,
[Notes
(1), (2)]

Full Size
Body
Diameter, E

Head

Neck

Length
Under
Head, L [Note (3)]

Minimum
Thread
Length,
l

r3
[Note (3)]

V
[Note (3)]

Min.

Max.

Nom.

Min.

Max.

Nom.

Min.

Max.

Nom.

Min.

Max.

Nom.

Min.

Max.

1 /2–13

0.482

0.515

7/8

0.8125

0.9375

5/16

0.25

0.3750

11/16

9/32

5/8

0.5938

0.6563

19/32

0.5625

0.6250

5/16

1
/2
body
diam.
of
bolt

Same
as
body
diam.
of
bolt

Under 7 in.by steps of 1/4 in.

From 7 in.to 10 in. by steps of 1/2 in.

11/8

5/8–11

0.605

0.642

15/64

1.0156

1.1406

25/64

0.33

0.4531

59/64

23/64

13/16

0.7813

0.8438

25/32

0.7500

0.8125

3/8

1 1/4

3/4–10

0.729

0.768

1 9/32

1.2188

1.3438

15/32

0.41

0.5313

1 5/32

7/16

1 1/16

1.0313

1.0938

1 1/32

1.0000

1.0625

7/16

1 3/4

7/8–9

0.852

0.895

1 31/64

1.4219

1.5469

35/64

0.48

0.6094

1 25/64

33/64

1 7/32

1.1875

1.2500

1 3/16

1.1563

1.2188

1/2

1–8

0.976

1.022

1 11/16

1.625

1.75

5/8

0.56

0.6875

15/8

19/32

1 3/8

1.3438

1.4063

1 11/32

1.3125

1.3750

9/16

2 1/4

1 1/8 - 7

1.098

1.149

1 57/64

1.8281

1.9531

45/64

0.64

0.7656

1 55/64

43/64

1 7/32

1.5000

1.5625

1 1/2

1.4688

1.5313

5/8

2 1/2

GENERAL NOTES:
(a) All dimensions are given in inches.
(b) Tolerances: Length L ± 1⁄8 in.
Neck O and R ± 1⁄32 in.
Head A and H ± 1/16 in.
NOTES:
(1) In ordering bolts, specify the nominal diameter D over the threads and not the body diameter.
(2) Standard sizes for industrial use are 1⁄2,5⁄8,3⁄4,7⁄8, and 1 in. with heavy square nuts. See Table 3.
(3) Applies to all rows.