S-8077A312 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and black oxide finish, ideal for harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under heavy loads.
• Precise alignment and smooth rotation enabled by the 2 3/4" shoulder with tight diameter tolerance for consistent assembly.
• Secure, non-slip installation thanks to the knurled hex socket head design, allowing easy torque application.
• Accurate and durable threading with Class 3A UNC coarse threads ensuring strong, vibration-resistant connections.
• Broad compliance and reliability meeting ASME B18.3 standards and RoHS/REACH regulations for safe, quality-assured use.
• Versatile right-hand thread design for straightforward installation in various machinery and equipment setups.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating parts and reducing wear in high-stress applications. Made from 316 Stainless Steel with a black oxide finish, it resists corrosion from chemicals and moisture, extending service life in industries like automotive, aerospace, and manufacturing. The hex socket head and knurled texture ensure secure gripping during installation, minimizing slippage and enhancing torque efficiency. With a Class 3A thread fit and coarse threading, it provides robust, vibration-resistant fastening, ideal for machinery where reliability and durability are paramount. This shoulder screw supports smooth pivoting and precise positioning, reducing maintenance needs and downtime in demanding environments.

Specification Summary & Compliance

This product features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring consistent fit. It adheres to ASME B18.3 standards for dimensional accuracy and Class 3A thread fit with UNC coarse threads. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use.