S-92710A221 4-40 x 3/16" Jack Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance: Zinc Yellow-Chromate plating provides excellent protection against rust and oxidation, extending service life in harsh industrial environments.
• High Tensile Strength: With a tensile strength of 55,000 psi, this jack screw reliably handles significant mechanical loads without failure.
• Precision Thread Fit: Class 2A (male) and Class 2B (female) thread fits ensure smooth, secure engagement and consistent performance in repetitive assemblies.
• Optimized for Torque Application: The 3/16" hex head with a tight ±0.005" tolerance allows for secure tool grip and efficient installation with standard wrenches.
• Durable Material Core: Made from 12L14 steel with a Rockwell B40 hardness, offering a robust balance of machinability and strength for demanding applications.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility for global supply chains.
• Versatile Male-Female Thread Design: The 4-40 unified thread with 5/8" length provides flexible connectivity options in compact assemblies.

Professional Applications & Engineering Value

This 4-40 thread jack screw is engineered to solve critical alignment and spacing challenges in precision assemblies. The Zinc Yellow-Chromate plated 12L14 steel construction resists corrosion in electronic enclosures, communication devices, and industrial machinery, where environmental exposure is a concern. Its Class 2A/2B thread fit guarantees minimal backlash and reliable mating with corresponding components, reducing the risk of cross-threading in high-cycle production environments. The 3/16" hex size enables quick installation and removal with standard tools, streamlining maintenance and assembly workflows. Ideal for applications requiring precise component positioning, such as PCB mounting or mechanical jigs, this screw delivers consistent performance while adhering to stringent industry regulations.

Specification Summary & Compliance

This jack screw adheres to unified thread standards with a Class 2A (male) and Class 2B (female) thread fit, ensuring dimensional accuracy for reliable assembly. Key specifications include a 4-40 thread size, 0.112" thread diameter, 5/8" thread length, and a 3/16" hex head with a tolerance of ±0.005". The material meets Rockwell B40 hardness and 55,000 psi tensile strength requirements. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industrial and electronic markets.