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  • Pilot diameter and undercuts allow plastic to flow into grooves providing high pullout resistance.
  • 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

ITC
Thread Code1 0420

A ± .005

.375 in
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E Nom.

.344 in

C ± .005

.321 in

S1 Nom.

.060 in

S2 Nom.

.090 in

Minor Dia.Min.

.197 in

Minor Dia.Max.

.207 in

Thread Specification

2B per ASME B1.1

Standard Material

300 Series Stainless Steel

Standard Finish

Passivated and/or tested per ASTM A380

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.