S-95446A656 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 Brass construction, ideal for harsh industrial environments and reducing maintenance frequency.
• Precise component alignment ensured by the smooth, 3/8" diameter shoulder with a tight tolerance fit, minimizing assembly play and vibration.
• High-strength performance offering 40,000 psi tensile strength and 22,000 psi shear strength for reliable load-bearing in demanding applications.
• Excellent durability and wear resistance due to the Rockwell B55 hardness, extending the screw's service life.
• Easy and secure installation with a standard hex socket drive (3/16"), allowing for high torque application without slippage.
• Wide compatibility and reliable fastening with 5/16"-18 UNC coarse threads and Class 2A fit, ensuring consistent engagement in various materials.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and export markets.

Professional Applications & Engineering Value

This precision brass shoulder screw is engineered to solve critical alignment and wear challenges in industrial machinery. The 360 Brass material provides inherent corrosion resistance, which is vital for operations in moist or chemically aggressive environments, preventing seizure and ensuring long-term reliability. The 3/8" shoulder diameter with precise tolerances acts as a pivot or axle, accurately locating parts like gears, bearings, and linkages, thereby reducing eccentric wear and misalignment. The 5/16"-18 UNC coarse thread with a Class 2A fit offers quick assembly and strong holding power in soft metals or plastics, common in assemblies requiring repeated disassembly. Its socket head design is perfect for compact spaces, providing a clean profile and secure drive. Ideal for use in precision instruments, conveyor systems, and automotive jigs, this screw enhances assembly accuracy and operational lifespan.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent, reliable fastening. The shoulder features a diameter of 3/8" with a tolerance of -0.002" to 0" and a length of 3/4" with a tolerance of 0" to 0.003", ensuring precise alignment. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, confirming its suitability for environmentally conscious industrial applications.