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  • Deformed threads lock screw in place to resist vibration.
  • Blind-end protects the threads from plastic intrusion.
  • Stainless steel inserts offer lead-free alternative.
Unit of Measure

Thread Size

 .250-20 (1/4-20)

Type

 IBLC

Thread Code

 0420

Length Code

 8

A ± .005

 .625 in
IBLC_Style1-and-Style2.jpg

H Min.

 .415 in

E Nom.

 .344 in

C ± .005

 .325 in

S1 ± 0.005

 .060 in

S2 ± 0.005

 .060 in
Minor Dia.Min.1 .197 in

Minor Dia.Max.

 .207 in

First Cycle on Locking Torque Min.

 4.50 in·lb

First Cycle on Locking Torque Max.

 30.00 in·lb

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 Minor diameter may be below minimum in deformed thread area.