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Tel 800.466.1940
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  • Designed for use in tapered holes.
  • Tapered mounting hole allows for rapid and accurate alignment prior to installation.
  • 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

 IUA
Thread Code1 0420

Length Code

 1

A ± .005

 .300 in
SI_IUB_dimension-518.jpg

E ± .005

 .375 in

C ± .005

 .354 in

Min. Hole Depth

 .340 in

D ± .002

 .349 in

F ± .002

 .363 in

R Ref. Taper Length

 .100 in

Fastener Material

 Aluminum

Standard Finish

 Plain

CAD Supplier

 PennEngineering® (SI®)

Inventory
  • 1 Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.