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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

 .425 - .500 in

Identification Mark

 5 Rad.

A ± .015

 1.187 in

B ± .015

 .665 in
a1060.jpg

C Nom.

 .062 in

øD + .000 - .004

 .413 in

E Max.

 .505 in

F + .005 -.000

 .120 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

 24.9 lb

Fastening

 Uninstalled

Thread Specification

 3B per ASME B1.1

Standard Material

 430 Series Stainless Steel

Standard Finish

 Passivated and/or tested per ASTM A380

CAD Supplier

 PennEngineering® (Atlas®)