Batch CAD Cart (0)
  • Cart is empty

Online literature contains the most current information available.
  • Designed for use in straight or tapered holes.
  • Symmetrical design eliminates the need for orientation.
  • Aluminum inserts ideal for light weight designs.
  • Aluminum and stainless steel inserts offer lead-free alternative.
Unit of Measure

Thread Size

N/A .250-20 (1/4-20)


Thread Code1 N/A 0420

A ± .005

N/A .500 in a1289.jpg

E ± .009

N/A .338 in

C ± .003

N/A .311 in

Min. Hole Depth

N/A .530 in

Hole Dia. +.003 -.000

N/A .315 in

Thread Specification

N/A 2B per ASME B1.1

Standard Material

N/A Aluminum

Standard Finish

N/A Plain

CAD Supplier

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