S-98256A102 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio from Grade 2 Titanium, offering 40,000 psi tensile strength for reliable performance in high-stress applications without adding bulk.
• Superior corrosion resistance inherent to titanium, ensuring long-term durability and reduced maintenance in harsh or corrosive industrial environments.
• Precise component alignment with a 1/8" shoulder diameter and standard shoulder fit, minimizing assembly misalignment and improving operational accuracy.
• Secure, slip-resistant fastening thanks to the knurled head texture and 5/64" hex drive, allowing for firm tool grip and consistent torque application.
• High thread reliability with Class 3A thread fit and UNC coarse threading, providing tight tolerances for vibration resistance and easy installation.
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting environmental and safety requirements for global industrial use.
• Optimized for demanding conditions featuring Rockwell B80 hardness and 20,000 psi shear strength, resisting wear and deformation under heavy loads.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw in Grade 2 Titanium addresses critical engineering challenges in precision assemblies, such as machinery, aerospace, and medical devices, where weight reduction and corrosion resistance are paramount. The coarse thread design and Class 3A thread fit ensure quick, secure fastening with minimal risk of cross-threading, while the knurled head and hex drive enhance grip for torque control in confined spaces. Its 1/8" shoulder diameter provides exact positioning for rotating parts, reducing friction and extending component life. Ideal for applications requiring high tensile strength and compliance with RoHS and REACH, this screw delivers consistent performance in corrosive or high-temperature environments, streamlining maintenance and boosting assembly reliability.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy, including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, it ensures environmental safety and material integrity for industrial use.