S-91273A665 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with 70,000 psi tensile strength and 35,000 psi shear strength, ideal for heavy-duty applications requiring reliable load-bearing capacity.
• Superior corrosion resistance from 18-8 stainless steel material and black oxide finish, ensuring long-lasting performance in harsh industrial environments.
• Precise alignment and smooth rotation due to the standard shoulder fit and knurled head, reducing wear and simplifying assembly in machinery.
• Easy installation and removal with a 1/4" hex drive and socket head design, allowing for secure torque application without slipping.
• Wide compatibility with 1/2"-13 UNC coarse threads and Class 2A fit, facilitating quick fastening in various components and reducing cross-threading risks.
• Environmental and regulatory safety through RoHS 3 and REACH compliance, meeting strict standards for hazardous substance restrictions.
• Consistent dimensional accuracy with tight shoulder diameter and length tolerances, ensuring repeatable performance in precision assemblies.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and component wear. The 18-8 stainless steel construction, combined with a black oxide finish, provides excellent resistance to corrosion and oxidation, making it suitable for demanding environments like automotive assemblies, machinery pivots, and conveyor systems. The 1/2"-13 UNC coarse threads and Class 2A fit ensure secure fastening with minimal effort, while the knurled head enhances grip during manual adjustments. With a robust shoulder length of 1-1/4", it acts as a precise spacer or pivot point, reducing vibration and extending equipment life in high-stress applications.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A fit for consistent thread engagement and tolerance. 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 1-1/4" (tolerance: -0.005" to 0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from restricted hazardous substances, and is manufactured to deliver reliable performance with a hardness of Rockwell B55.