S-91273A219 3/8"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs.
• High mechanical strength offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance under heavy loads.
• Precision alignment and smooth rotation ensured by the 3/8" shoulder diameter with controlled tolerances, minimizing wear in assemblies.
• Secure and easy installation with a hex socket drive and knurled head, providing excellent grip and preventing tool slippage.
• Fine UNF thread with Class 2A fit delivers superior vibration resistance and secure fastening in precision applications.
• Compliance with major regulations including RoHS 3 and REACH, ensuring environmental safety and global market acceptance.
• Consistent hardness (Rockwell B55) for excellent durability and resistance to deformation during repeated use.

Professional Applications & Engineering Value

This 3/8"-24 UNF shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 18-8 stainless steel material provides exceptional resistance to corrosion and oxidation, making it suitable for demanding environments like automotive assemblies, packaging machinery, and conveyor systems. The hex socket head with a knurled texture ensures secure tool engagement, reducing the risk of stripping during high-torque installation. The fine UNF thread and precise shoulder diameter allow for accurate alignment of moving parts, minimizing play and wear. This design is ideal for applications requiring a pivot point, spacer, or shaft, where high tensile strength and vibration resistance are paramount for operational reliability and reduced downtime.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit for consistent assembly and performance. The shoulder diameter is manufactured to a tight tolerance of -0.004" to -0.002", and the shoulder length tolerance is -0.005" to 0.005", ensuring precise dimensional accuracy. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its compliance with environmental and safety standards for industrial use.