Batch CAD Cart (0)
  • Cart is empty

Online literature contains the most current information available.
  • 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

N/A .250-20 (1/4-20)



Thread Code

N/A 0420

Length Code

N/A 8

A ± .005

N/A .625 in IBLC_Style1-and-Style2.jpg

H Min.

N/A .415 in

E Nom.

N/A .344 in

C ± .005

N/A .325 in

S1 ± 0.005

N/A .060 in

S2 ± 0.005

N/A .060 in
Minor Dia.Min.1 N/A .197 in

Minor Dia.Max.

N/A .207 in

First Cycle on Locking Torque Min.

N/A 4.50 in·lb

First Cycle on Locking Torque Max.

N/A 30.00 in·lb

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 Minor diameter may be below minimum in deformed thread area.