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Online literature contains the most current information available.
  • 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

N/A 5/16-18

Grip Range

N/A .425 - .500 in

Identification Mark

N/A 5 Rad.

B ± .015

N/A .665 in a1060.jpg

C Nom.

N/A .062 in

øD + .000 - .004

N/A .413 in

E Max.

N/A .505 in

F + .005 -.000

N/A .120 in

M Ref.

N/A .565 in

Install Drill Size Ref.


Install Hole Size Min.

N/A .413 in

Install Hole Size Max.

N/A .423 in

Pull Up Factor

N/A .120 in

Weight per 1000

N/A 24.9 lb


N/A Installed

Thread Specification

N/A 3B per ASME B1.1

Standard Material

N/A 300 Series Stainless Steel

Standard Finish

N/A Passivated and/or tested per ASTM A380

CAD Supplier

N/A PennEngineering® (Atlas®)