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  • Designed for high load applications. Countersunk feature allow fastener to be installed flush with sheet surface.
  • 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 1/4-20

Grip Range

 N/A .151 - .211 in

Identification Mark

 N/A 1 Rad.

B Ref.

 N/A .529 in a1058.jpg

C Max.

 N/A .089 in

øD + .000 - .004

 N/A .332 in

E Max.

 N/A .382 in

F + .005 -.000

 N/A .054 in

M Ref.

 N/A .440 in

P - Keyway Width + .003 -.000

 N/A .062 in

H - Keyway Height

 N/A .056 - .058 in

Install Drill Size Ref.

 N/A Q

Install Hole Size Min.

 N/A .332 in

Install Hole Size Max.

 N/A .338 in

Pull Up Factor

 N/A .095 in

Weight

 N/A 10.6 lb

Fastening

 N/A Installed

Thread Specification

 N/A 3B per ASME B1.1

Standard Material

 N/A Alloy No. 260 Brass

Standard Finish

 N/A None - bright as machined

CAD Supplier

 N/A PennEngineering® (Atlas®)