S-97345A678 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments including marine and chemical applications
• Precise alignment and smooth rotation ensured by the 1/2" shoulder diameter with tight tolerance control for reduced assembly vibration
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing in demanding applications
• Secure, tamper-resistant installation with the 1/4" hex socket drive and knurled head for enhanced grip during tightening
• Interchangeable compatibility thanks to UNC coarse threads with Class 3A fit, meeting ASME B18.3 standards for consistent quality
• Extended service life with RoHS 3 and REACH compliance, ensuring environmental safety and durability in industrial assemblies
• Efficient assembly process facilitated by the right-hand coarse thread design, reducing installation time and effort

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and corrosion challenges in precision machinery. The 316 Stainless Steel material provides exceptional resistance to chemicals and moisture, making it suitable for industrial fasteners in marine equipment, food processing, and pharmaceutical applications. The hex socket head with knurled texture ensures secure torque application without slippage, while the Class 3A thread fit and precise shoulder dimensions minimize play in rotating assemblies like pivots, gears, and conveyor systems. By integrating ASME B18.3 standards, this shoulder screw delivers consistent performance, reducing maintenance downtime and enhancing operational reliability in high-stress environments.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, featuring a Class 3A thread fit for tight tolerance assembly. Key dimensions include a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1-3/8" (tolerance: -0.005" to 0.005"), ensuring precise alignment. The UNC coarse thread (3/8"-16) with right-hand direction supports efficient installation. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety, while the Rockwell B79 hardness and 70,000 psi tensile strength meet rigorous industrial demands.