S-95446A648 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and electrical conductivity with 360 brass construction, ideal for harsh environments and electronic assemblies.
• Exceptional alignment precision due to the precisely machined shoulder with a tight ±0.003" length tolerance, reducing assembly errors.
• High mechanical strength offering 40,000 psi tensile and 22,000 psi shear strength for reliable, long-lasting fastening under stress.
• Easy installation and high torque resistance with the internal hex socket drive, preventing stripping and ensuring secure tightening.
• Consistent and reliable thread engagement with Class 2A UNC coarse threads, facilitating quick assembly and disassembly.
• Excellent durability and wear resistance from Rockwell B55 hardness, maintaining performance in repetitive motion applications.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe use in global industrial markets.

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw is engineered to solve critical alignment and durability challenges in precision assemblies. The 360 brass material provides excellent corrosion resistance, making it suitable for marine, chemical, and electronic applications where moisture and conductivity are concerns. The 1-1/4" shoulder length with minimal tolerance ensures precise component spacing and rotational alignment in machinery, pivots, and gear assemblies, reducing wear and operational downtime. Combined with a hex socket drive and coarse UNC threads, it allows for efficient installation in tight spaces, offering a robust fastening solution that maintains integrity under high tensile and shear loads. Ideal for use in automated equipment, conveyor systems, and precision instruments, this screw delivers reliable performance where exact positioning and long-term reliability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder features a precise diameter of 3/16" with a tight tolerance of -0.002" to 0", and a length of 1-1/4" with a ±0.003" tolerance. Manufactured from 360 brass with a hardness of Rockwell B55, it meets mechanical properties including 40,000 psi tensile strength and 22,000 psi minimum shear strength. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloys and REACH (EC 1907/2006), ensuring environmental safety for industrial use.