S-90337A427 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel material, ideal for harsh industrial environments and reducing replacement frequency.
• Enhanced durability and load-bearing capacity from 70,000 psi tensile strength and Rockwell B55 hardness, ensuring long-term reliability under stress.
• Precise component alignment due to the precisely fitted 1-1/8" shoulder with minimal tolerance, minimizing assembly errors and improving machine performance.
• Space-saving low profile socket head allows for installation in tight spaces while providing secure hex drive engagement for easy tightening.
• Reliable thread engagement with Class 2A UNC coarse threads, offering quick assembly and reduced cross-threading risks in high-vibration applications.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global market acceptance.
• Optimized for right-hand thread applications with a 3/16" thread length, providing sufficient grip without unnecessary protrusion.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 Stainless Steel construction offers excellent corrosion resistance, making it suitable for machinery exposed to moisture, chemicals, or outdoor conditions. The low profile socket head design enables flush mounting in confined spaces, while the hex drive ensures secure torque application without slippage. The precisely machined shoulder with a 1-1/8" length acts as a pivot or spacer, maintaining exact part positioning in applications like rotating shafts, linkages, and bearing mounts. Its coarse UNC threads and Class 2A fit facilitate quick installation and reliable performance in high-vibration environments, reducing maintenance downtime and enhancing operational efficiency in automotive, aerospace, and industrial equipment.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit with UNC coarse threads, ensuring standard-compliant dimensional accuracy. The shoulder diameter tolerance is -0.001" to 0", and shoulder length tolerance is 0" to 0.002", providing precise fit for engineering applications. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming adherence to environmental and safety regulations for industrial use.