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  • Designed for high load applications. Available with rib, key or full hex features for high torque applications.
  • Both UNC and UNF threads available in No. 10 and larger thread sizes. Check for availability of other grip ranges and designs.
Unit of Measure

Thread Size

5/16-18

Grip Range

.350 - .425 in

Identification Mark

4 Rad.

B ± .015

.665 in
a1060.jpg

C Nom.

.062 in

øD + .000 - .004

.413 in

E Max.

.505 in

F + .005 -.000

.120 in

L ± .015

1.531 in

K Ref.

.575 in

Install Drill Size Ref.

Z

Install Hole Size Min.

.413 in

Install Hole Size Max.

.423 in

Pull Up Factor

.120 in

Weight per 1000

24.0 lb

Fastening

Uninstalled

Thread Specification

3B per ASME B1.1

Standard Material

Low Carbon Steel

Standard Finish

Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II

CAD Supplier

PennEngineering® (Atlas®)

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