S-92012A403 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with alloy steel construction and 140,000 psi tensile strength, ensuring reliable performance in high-stress industrial applications.
• Superior corrosion resistance provided by the black oxide finish, extending service life and reducing maintenance needs in harsh environments.
• Precise alignment and smooth rotation due to the smooth shoulder with tight diameter and length tolerances, minimizing wear and vibration in assemblies.
• Easy installation and high torque capability with the hex socket drive, allowing for secure fastening in confined spaces without stripping.
• Consistent thread engagement from the UNC coarse thread and Class 2A fit, enabling quick assembly and reducing the risk of cross-threading.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in various global markets and applications.
• Optimized for repetitive use with Rockwell C32 hardness, maintaining dimensional stability and resistance to deformation under load.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. The alloy steel material, combined with a black oxide finish, offers excellent resistance to corrosion and abrasion, making it ideal for automotive, aerospace, and manufacturing equipment. The smooth shoulder with precise tolerances ensures accurate positioning of moving parts, reducing friction and extending the lifespan of assemblies. Its coarse thread and Class 2A fit facilitate quick installation in high-volume production, while the hex drive allows for efficient torque application in tight spaces. This screw delivers reliable performance in applications like pivots, guides, and rotating shafts, where durability and exact fit are paramount.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit with UNC coarse threads, ensuring standard compatibility and ease of assembly. Dimensions include a 1/2" shoulder length and 3/8" shoulder diameter, manufactured to tight tolerances for precise applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industries. The product meets common industrial standards for material and threading, supporting consistent quality and safety in engineering use.