S-98256A104 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from Grade 2 Titanium, ideal for harsh environments without compromising integrity.
• High tensile strength of 40,000 PSI ensures reliable performance under heavy loads and stress.
• Precise Class 3A thread fit guarantees secure fastening with minimal backlash in assemblies.
• Knurled socket head with 5/64" hex drive provides superior grip and easy installation with standard tools.
• Robust Rockwell B80 hardness enhances wear resistance, extending service life in dynamic applications.
• Compliance with RoHS 3 and REACH meets stringent environmental and safety standards for global use.
• Optimized shoulder design with 1/8" diameter and 5/16" length for accurate alignment and spacing.

Professional Applications & Engineering Value

This Grade 2 Titanium shoulder screw with 4-40 UNC coarse threads and Class 3A fit addresses critical challenges in precision engineering, such as component misalignment and corrosion-induced failure. The titanium material offers a high strength-to-weight ratio, reducing overall system weight while resisting chemical degradation in industrial settings like aerospace, medical devices, and electronics. The knurled socket head ensures torque retention during assembly, minimizing slippage and improving efficiency. With a 5/32" thread length and standard shoulder fit, it provides stable pivoting and rotational support in machinery, enhancing durability and reducing maintenance costs in high-stress applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise engagement. Dimensions include a thread diameter of 0.112", shoulder diameter of 1/8" (tolerance: -0.004" to -0.002"), and shoulder length of 5/16" (tolerance: -0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial use.