S-97768A448 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and black oxide finish, ideal for harsh industrial environments.
• High load-bearing capacity offering 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under stress.
• Precise alignment and smooth rotation ensured by the 2-3/4" shoulder with tight tolerances, reducing wear in assemblies.
• Easy installation and removal with a 1/4" hex drive and knurled head for secure grip and torque application.
• Consistent thread engagement due to Class 3A fit and 3/8"-16 UNC coarse thread, minimizing cross-threading risks.
• Durable construction with Rockwell B55 hardness, providing long-term reliability in repetitive applications.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. The 18-8 stainless steel material, combined with a black oxide finish, offers excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, aerospace, and manufacturing equipment. The 2-3/4" shoulder length provides a precise pivot point or spacer, allowing smooth rotational movement in linkages, bearings, and gears. With a 3/8"-16 UNC coarse thread and Class 3A fit, it ensures quick assembly and reliable fastening in high-vibration environments, reducing maintenance downtime and enhancing operational efficiency for B2B clients.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for high precision, adhering to UNC thread standards with a diameter of 0.375" and coarse spacing. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and the shoulder length is 2-3/4" with a tolerance of -0.005" to 0.005", ensuring dimensional accuracy. It complies with ASME B18.3 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use.