S-97345A905 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure.
• High mechanical strength and durability with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under heavy loads.
• Precise alignment and smooth rotation provided by the 1" diameter shoulder with tight diameter and length tolerances for consistent assembly.
• Superior thread engagement and reliability due to the Class 3A thread fit on 3/4"-10 UNC coarse threads, reducing the risk of cross-threading.
• Secure and easy installation with a 1/2" hex drive and knurled head for improved grip, even in greasy or high-vibration conditions.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety for global supply chains.
• Versatile right-hand threading for standard applications, facilitating quick assembly and disassembly in automated or manual processes.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The Class 3A thread fit and UNC coarse threads ensure fast, secure fastening with minimal risk of stripping, while the precisely machined shoulder provides stable bearing surfaces for rotating parts like gears, pulleys, and linkages. The knurled head and 1/2" hex drive allow for efficient torque application, reducing installation time in high-volume production. With excellent corrosion resistance from its material grade, this screw is ideal for applications in marine, chemical processing, and food manufacturing, where reliability and longevity are paramount. Its compliance with ASME B18.3 standards guarantees consistent quality, making it a trusted component for engineers seeking durable, high-performance fastening solutions.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a shoulder diameter of 1" with a tolerance of -0.004" to -0.002" and a shoulder length of 2 3/4" with a tolerance of -0.005" to 0.005". The thread fit adheres to Class 3A standards for unified coarse (UNC) threads, ensuring high accuracy and reliability. Manufactured in compliance with ASME B18.3, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally sensitive and industrial applications requiring strict material safety.