S-90337A485 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ensuring long-term reliability in harsh industrial environments.
• Precise component alignment due to exact shoulder diameter tolerance (-0.001" to 0") and smooth texture, minimizing assembly errors.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing dependable load-bearing capacity.
• Easy installation and removal featuring a low-profile socket head with 5/32" hex drive, allowing efficient access in confined spaces.
• Secure and consistent fastening from UNC coarse threads with Class 2A fit, reducing the risk of cross-threading and loosening.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe and environmentally responsible usage.
• Optimized for repetitive use with a right-hand thread and 1" shoulder length, offering stability in rotating or pivoting applications.

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel construction, enhanced by a passivated finish, resists oxidation and chemical exposure, making it ideal for automotive, aerospace, and manufacturing equipment. The precise shoulder diameter and Class 2A thread fit ensure minimal play, which is essential for maintaining accurate positioning in assemblies like bearings, linkages, and pivots. Its low-profile socket head with a 5/32" hex drive facilitates quick installation even in tight spaces, reducing downtime. By combining high tensile strength and corrosion resistance, this screw delivers long-term performance in demanding applications, from conveyor systems to precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent engagement. The shoulder features a diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002", ensuring precise alignment. Manufactured from 18-8 stainless steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for regulated industries. The mechanical properties, including a tensile strength of 70,000 psi and Rockwell B55 hardness, support reliable performance in high-stress environments.