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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

.250-28 (1/4-28)

Type

ITB
Thread Code1 0428

A ± .005

.375 in
a1292_1.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

Free-machining, Leaded Brass

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.