S-91273A309 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise alignment and pivot function due to the standard shoulder fit and consistent shoulder diameter, minimizing part wear.
• Easy installation and removal with the 3/16" hex socket drive and knurled head, providing a secure grip and reducing tool slippage.
• Durable thread engagement from UNC coarse threads and Class 2A fit, ensuring secure fastening in various materials.
• Enhanced durability with Rockwell B55 hardness, resisting deformation and extending service life in demanding applications.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant for safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision machinery and assembly lines. Its 3/8"-16 UNC coarse threads and Class 2A thread fit provide reliable fastening with excellent vibration resistance, reducing the risk of loosening in dynamic environments. The standard shoulder design ensures accurate component alignment, acting as a pivot or spacer in applications like rotating assemblies, conveyor systems, and automotive fixtures. Made from corrosion-resistant stainless steel, it withstands exposure to moisture and chemicals, minimizing downtime in industrial settings. The hex socket drive and knurled head facilitate quick installation with standard tools, enhancing efficiency in high-volume production. Ideal for use in industrial fasteners for machinery, robotics, and equipment frames, this screw delivers long-term reliability and performance where precision and strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a shoulder diameter of 3/8" with a tolerance of -0.004" to -0.002" and a shoulder length of 1/2" with a tolerance of -0.005" to 0.005". Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, it ensures environmental safety and regulatory conformity for industrial use.