Catalog

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  • Press-fit insert provides strong, reusable threads. No heat or ultrasonics required.
  • Hexagonal “barbed” configuration ensures high torqueout and pullout values.
  • Aluminum inserts ideal for light weight designs.
  • Aluminum and stainless steel inserts offer lead-free alternative.
Unit of Measure

Thread Size

 .250-20 (1/4-20)

Type

 NFPA

Thread Code

 0420

A Max.

 .315 in
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C Max.

 .311 in

E Nom.

 .312 in

Min. Sheet Thickness

 .328 in

Hole Size in Sheet + .003 - .000

 .312 in

Min. Boss Dia.

 .750 in
Min. Depth Full Thread H1 .300 in

Thread Specification

 2B per ASME B1.1

Standard Material

 Aluminum

Standard Finish

 Plain

CAD Supplier

 PennEngineering® (SI®)
  • 1 Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at pilot end.