S-90807A147 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 140,000 psi tensile strength for reliable performance in high-stress applications.
• Precision thread engagement with Class 3A fit ensures secure fastening and reduces the risk of loosening under vibration.
• Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments.
• Enhanced grip and torque application with a knurled socket head and 1/4" hex drive, preventing tool slippage during installation.
• Accurate alignment and bearing surface due to tight shoulder diameter tolerance (-0.004" to -0.002"), minimizing assembly play.
• High durability and wear resistance from alloy steel construction and Rockwell C32 hardness, suitable for repetitive use.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 1/2"-13 UNC shoulder screw is engineered to address critical challenges in heavy-duty machinery and precision assembly systems. The alloy steel material, combined with a black oxide finish, provides robust resistance to corrosion and wear, making it ideal for applications in automotive, aerospace, and industrial equipment where exposure to oils and moisture is common. The Class 3A thread fit and precise shoulder diameter tolerance ensure exact alignment and reduced vibration-induced failures, while the socket head with knurled texture allows for efficient torque transfer in confined spaces. By offering reliable performance under high tensile loads, this shoulder screw enhances operational safety and reduces maintenance downtime in demanding environments.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A thread fit for superior precision. Key dimensional tolerances include a shoulder diameter of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured from alloy steel with a black oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for industrial use.