S-98256A105 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from Grade 2 Titanium construction, ideal for harsh environments without compromising integrity.
• High tensile strength of 40,000 psi ensures reliable performance under heavy loads and mechanical stress.
• Precise Class 3A thread fit guarantees secure fastening with minimal risk of loosening in critical assemblies.
• 5/64" hex drive with knurled head provides superior grip and easy installation, reducing tool slippage.
• 1/8" shoulder diameter with tight tolerances offers accurate alignment and smooth rotation in pivot or bearing applications.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.
• Rockwell B80 hardness enhances durability and wear resistance, extending service life in repetitive use.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw made from Grade 2 Titanium addresses common industrial challenges like corrosion, weight reduction, and precision alignment. Its coarse UNC threads and Class 3A fit provide quick, secure fastening in high-vibration settings, while the 1/8" shoulder diameter ensures exact positioning in machinery, pivots, or bearing mounts. The knurled socket head with a 5/64" hex drive allows for efficient installation in tight spaces, reducing assembly time. Ideal for aerospace, medical devices, and automotive sectors, it combines high strength with lightweight properties, solving issues of material fatigue and environmental degradation.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for precision. Dimensions include a shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and length of 3/8" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring compliance for industrial and export requirements.