S-92944A128 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• High-strength performance with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing capacity in demanding applications.
• Precise Class 3A thread fit for superior engagement and vibration resistance, minimizing the risk of loosening in machinery.
• Optimized shoulder design with a 1/4" shoulder length and 3/8" diameter, providing accurate alignment and acting as a pivot or axle.
• Easy installation and removal thanks to the hex drive (7/32") and standard 82° countersink angle, streamlining assembly processes.
• Durable Rockwell B55 hardness offering excellent wear resistance and long-term reliability under repetitive use.
• Compliance with RoHS 3 and REACH regulations, ensuring environmental safety and meeting global industry standards for hazardous substances.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and rotational movement challenges in industrial machinery. The 18-8 stainless steel material provides robust corrosion resistance, essential for applications exposed to moisture or chemicals, while the Class 3A thread fit ensures tight tolerances that prevent backlash in high-vibration environments like automotive assemblies or conveyor systems. The precisely machined shoulder acts as a dependable bearing surface or pivot point, reducing wear on mating components and extending equipment lifespan. With a coarse thread spacing and right-hand thread direction, it facilitates quick assembly in production lines, making it a versatile choice for OEMs and maintenance teams seeking reliability and efficiency in industrial fasteners.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A fit for high precision. Key dimensional tolerances include a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from restricted hazardous substances for safe use in various industries.