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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

Specifications

Thread Size

.250-28 (1/4-28)

Type

ITA
Thread Code1 0428

A ± .005

.375 in a1292.jpg

E Nom.

.344 in

C ± .005

.321 in

S1 Nom.

.060 in

S2 Nom.

.090 in

Minor Dia.Min.

.212 in

Minor Dia.Max.

.220 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 last thread.