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  • Works in any thickness over .029”/0.76mm including blind applications.
  • Minimal backside protrusion for restricted space applications.
  • Additional thread sizes and grip ranges available. Not a typical stock item.
  • Other materials available.
NOTE: The internal threads are manufactured oversized to compensate for resulting thread portion shrinkage during the installation process. They are not gaugeable prior to or after installation but will be compatible with Class 2A/3A or 6g screws after installation.
Unit of Measure

Thread Size

 1/4-20

Grip Range

 .030 in - Over

A ± .005

 .400 in
a1041_1.jpg

B ± .015

 1.005 in

øC Max.

 .3745 in

Installation Hole Size at Grip Range

 .375 in at .030 - .090 in .375 in at .091 - .124 in .386 in at .125 - .186 in .391 in at .187 in - Over

Blind Hole Depth Min.

 .540 in

Fastening

 Uninstalled

Standard Material

 Low Carbon Steel

Standard Finish

 Cadmium Plate per SAE AMS-QQ-P-416, Class III, Type I

CAD Supplier

 PennEngineering® (Atlas®)