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  • 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

.250-20 (1/4-20)

Type

ISB
Thread Code1 0420

A ± .005

.500 in
a1289.jpg

E ± .009

.338 in

C ± .003

.311 in

Min. Hole Depth

.530 in

Hole Dia. +.003 -.000

.315 in

Thread Specification

2B per ASME B1.1

Standard Material

Free-machining, Leaded Brass

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 last thread