S-96562A028 2-56 x 1/2" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent Nylon patch thread locker that maintains secure fastening in temperatures from -70° to 250°F, preventing loosening in demanding environments.
• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ensuring long-term durability in harsh industrial conditions.
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness, providing reliable load-bearing capacity for critical assemblies.
• Precision threading with UNC coarse threads and Class 2A fit, enabling quick installation and consistent engagement in various materials.
• Enhanced drive stability through Phillips No. 1 drive and rounded pan head design, reducing cam-out and improving torque application.
• Full-threaded design along the entire 1/2" length, maximizing grip range and adjustment flexibility in assembly applications.
• Regulatory compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for quality assurance and environmental safety.

Professional Applications & Engineering Value

Engineered for vibration-prone environments, these 2-56 UNC nylon patch locking screws deliver reliable fastening in industrial machinery, electronic enclosures, and automotive components where thermal cycling and mechanical stress are common. The 18-8 stainless steel material combined with passivated finish resists oxidation and chemical exposure, extending service life in humid or corrosive settings. The coarse thread design and Class 2A fit facilitate rapid assembly while maintaining alignment accuracy, reducing installation time and rework. With a permanent thread locker that performs across a wide temperature range, these rounded head screws prevent spontaneous loosening, minimizing maintenance downtime and enhancing operational safety in high-vibration applications.

Specification Summary & Compliance

This 2-56 UNC screw features Class 2A thread fit with coarse spacing and full threading along the 1/2" length. Manufactured to ASME B18.6.3 specifications, it ensures dimensional accuracy and interchangeability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.