S-92710A228 4-40 x 3/16" Jack Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against harsh industrial environments
• Precise thread engagement with Class 2A/2B fit ensuring reliable mating and vibration resistance
• High tensile strength of 55,000 psi for demanding applications requiring secure fastening
• Consistent dimensional accuracy with ±0.005" hex and length tolerances for uniform installation
• Durable material construction using 12L14 steel with Rockwell B40 hardness for long service life
• Versatile male-female threading (4-40) enabling stacking and spacing in electronic assemblies
• Regulatory compliance with RoHS 3 standards for use in sensitive electronic applications

Professional Applications & Engineering Value

These hex jack screws solve critical spacing and mounting challenges in precision industries. The zinc-plated 12L14 steel construction provides excellent corrosion protection while maintaining 55,000 psi tensile strength for reliable performance in vibration-prone environments. The Class 2A thread fit ensures consistent engagement with mating components, preventing loosening in electronic enclosures, communication equipment, and industrial control systems. With 3/4" thread length and precise 3/16" hex size, these screws offer optimal torque transmission and alignment in confined spaces. The combination of male-female threading and Rockwell B40 hardness makes them ideal for repeated assembly/disassembly cycles in test equipment and precision instrumentation.

Specification Summary & Compliance

Manufactured to inch system standards with Class 2A external threads and Class 2B internal threads maintaining precise tolerances of ±0.005" for hex size and length. Thread specifications include 4-40 thread size with 0.112" diameter and 3/4" thread length. Fully compliant with RoHS 3 (2015/863/EU) regulations under exemption 6(a)-I for lead as an alloying element in steel. The zinc-plated 12L14 steel construction meets industrial fastener requirements for strength and environmental resistance.