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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

N/A .086-56 (#2-56)


Thread Code1 N/A 256

A ± .005

N/A .125 in a1292.jpg

E Nom.

N/A .156 in

C ± .005

N/A .142 in

S1 Nom.

N/A .030 in

S2 Nom.

N/A .030 in
Minor Dia.Min.2 N/A .067 in

Minor Dia.Max.

N/A .0737 in

Thread Specification

N/A 2B per ASME B1.1

Standard Material

N/A 300 Series Stainless Steel

Standard Finish

N/A Passivated and/or tested per ASTM A380

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.
  • 2 Minor diameter may be below minimum in deformed thread area.

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