S-91273A249 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• Superior strength and durability with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable, long-lasting performance.
• Precise alignment and secure positioning thanks to the standard shoulder fit and Class 2A thread tolerance, reducing assembly errors.
• Easy installation and removal with a knurled hex socket head and 5/16" drive, providing a secure grip and reducing tool slippage.
• High shear resistance with a minimum shear strength of 35,000 psi, ensuring stability in high-stress applications.
• Broad compatibility with UNC coarse threads and right-hand direction, fitting standard industrial components seamlessly.
• Environmental and regulatory compliance with RoHS 3 and REACH, making it safe for global supply chains.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in machinery assembly, pivoting mechanisms, and precision equipment. The 18-8 Stainless Steel material offers excellent resistance to rust and corrosion, extending service life in demanding conditions like manufacturing or outdoor use. Its hex socket head with a knurled texture ensures a firm grip, minimizing the risk of stripping during torque application, while the Class 2A thread fit and coarse threading provide reliable fastening without cross-threading issues. The shoulder design allows for accurate component alignment, reducing wear and maintenance costs in applications such as conveyor systems, robotic arms, and automotive assemblies. By integrating high tensile and shear strength, this fastener supports heavy-duty operations, ensuring safety and efficiency in industrial fastener setups.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy, including a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 7/8" (tolerance: -0.005" to 0.005"). It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industries.