S-90807A146 1/2"-13 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 under high-stress conditions.
• Precise thread fit and alignment with Class 3A thread fit and UNC coarse threads, reducing the risk of cross-threading and improving assembly efficiency.
• Enhanced corrosion resistance thanks to the black oxide finish, which provides protection in demanding industrial environments.
• Secure and easy installation with a knurled socket head and 1/4" hex drive, offering superior grip and torque application without slippage.
• Accurate shoulder dimensions featuring a 1/2" diameter and 1" length with tight tolerances, ensuring consistent positioning and alignment in assemblies.
• High hardness rating of Rockwell C32, providing excellent wear resistance and long service life in repetitive motion applications.
• Compliance with environmental standards including RoHS 3 and REACH, making it suitable for global supply chains and regulated industries.

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address common challenges in precision machinery, automation systems, and heavy-duty equipment. The alloy steel material, combined with a black oxide finish, offers superior resistance to corrosion and wear, extending component life in harsh operational environments. The Class 3A thread fit and coarse UNC threads ensure quick, secure fastening with minimal risk of stripping, while the knurled socket head with hex drive allows for high-torque installation without tool slippage. The precisely machined shoulder with a diameter of 1/2" and length of 1" provides stable bearing surfaces for rotating parts, reducing vibration and misalignment in applications such as conveyor systems, robotics, and assembly jigs. By integrating high tensile strength and strict dimensional tolerances, this shoulder screw delivers reliable performance, minimizing downtime and maintenance costs in industrial settings.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for precise engagement. Key dimensions include a thread size of 1/2"-13, shoulder diameter of 1/2" (tolerance: -0.004" to -0.002"), and shoulder length of 1" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring it is free from hazardous substances and suitable for use in regulated industries.