S-90337A167 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
• Precise shoulder fit with minimal diameter tolerance for accurate alignment in assemblies, reducing wear.
• Low profile socket head with hex drive allows for easy installation in tight spaces using standard tools.
• Coarse UNC threads (Class 2A fit) provide quick assembly and secure fastening in various materials.
• Rockwell B55 hardness offers excellent durability and resistance to deformation over time.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards.

Professional Applications & Engineering Value

This 4-40 UNC low profile socket head shoulder screw is engineered to address common industrial challenges such as misalignment and component wear. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in demanding settings like machinery, automotive, and electronics. The precise shoulder diameter of 1/8" and controlled tolerances ensure accurate positioning, reducing stress on connected parts. Its coarse thread design and hex drive facilitate quick installation, making it ideal for applications requiring reliable, repeatable fastening in confined spaces. This screw delivers consistent performance, minimizing downtime and maintenance costs in industrial shoulder screw applications.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit per UNC standards, ensuring precise engagement and compatibility. Dimensions include a shoulder diameter of 1/8" with tight tolerances (-0.001" to 0") and a shoulder length of 5/16" (0" to 0.002" tolerance). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use.