S-97345A273 3-48 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise alignment and secure pivoting enabled by the smooth, cylindrical shoulder with controlled diameter and length tolerances.
• High-strength fastening with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for reliable performance under load.
• Secure, slip-resistant installation thanks to the knurled texture on the hex socket head, providing a positive grip for drivers.
• Exceptional thread quality and fit with a Class 3A UNC coarse thread, ensuring consistent engagement and vibration resistance in assemblies.
• Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains and sensitive applications.
• Optimized for standard tooling with a 5/64" hex drive, facilitating quick and easy installation with common industrial drivers.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to solve critical alignment and wear challenges in precision machinery. The UNC coarse thread with Class 3A fit provides a secure, vibration-resistant fastening solution, while the precisely machined shoulder acts as a pivot, axle, or spacer, reducing wear on mating parts in assemblies like linkages, gears, and rotating fixtures. The hex socket head with knurled texture ensures the driver bit does not slip during torque application, preventing damage to the screw head and maintaining assembly integrity. Made from corrosion-resistant 316 stainless steel, it delivers long-term reliability in demanding environments, including those exposed to moisture or chemicals, making it a vital component for industrial automation, packaging equipment, and precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a precise Class 3A thread fit for consistent performance. Dimensional specifications include a shoulder diameter of 1/8" (with a tolerance of -0.004" to -0.002") and a shoulder length of 5/16" (with a tolerance of -0.005" to 0.005"), ensuring accurate alignment. The screw is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, confirming its suitability for regulated industrial applications.