S-93985A519 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 416 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• High-strength performance offering 120,000 psi tensile strength and Rockwell C26 hardness for reliable load-bearing in demanding applications.
• Precise component alignment enabled by the smooth, 1/8" diameter shoulder with a precise fit, reducing wear and ensuring accurate assembly.
• Secure and efficient installation with a standard hex socket (5/64" drive) and right-hand UNC coarse threads, allowing for high torque application and quick fastening.
• Consistent thread engagement provided by Class 2A thread fit, ensuring reliable performance and interchangeability in automated or manual assembly.
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, making it suitable for global markets and environmentally conscious manufacturing.
• Versatile shoulder design featuring a 3/8" length for spacing or pivoting components, simplifying mechanical designs and reducing part count.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 416 Stainless Steel material provides excellent resistance to corrosion and wear, making it ideal for machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The 1/8" shoulder diameter with precise tolerances ensures minimal play, facilitating accurate positioning of gears, bearings, or linkages without additional bushings. Combined with a 3/8" shoulder length, it acts as a reliable spacer or pivot, reducing assembly complexity and maintenance needs. The hex socket drive and coarse UNC threads enable quick, secure fastening in high-vibration environments, enhancing productivity and reducing downtime in industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1/8" (tolerance: -0.001" to 0") and length of 3/8" (tolerance: 0" to 0.002"), ensuring precise integration. It is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.