S-97768A429 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Precise component alignment ensured by the 1 1/4" shoulder with tight diameter and length tolerances.
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
• Reliable thread engagement with Class 3A UNC coarse threads for secure fastening and easy assembly.
• Enhanced durability and wear resistance from the black oxide finish and Rockwell B55 hardness.
• Secure, non-slip installation facilitated by the hex socket drive and knurled head design.
• Compliance with major standards including ASME B18.3, RoHS 3, and REACH for quality assurance.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and strength challenges in industrial machinery, automation systems, and precision equipment. The 18-8 stainless steel material provides excellent corrosion resistance, while the black oxide finish enhances surface durability and reduces galling. The 1 1/4" shoulder length with controlled tolerances ensures precise positioning of moving parts, such as gears and pulleys, minimizing wear and maintaining operational accuracy. Its Class 3A thread fit and coarse UNC threads offer reliable fastening in high-vibration environments, making it a trusted component for heavy-duty applications where failure is not an option.

Specification Summary & Compliance

The screw features a 3/8"-16 UNC thread with Class 3A fit for superior thread engagement and a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for precise alignment. Manufactured in compliance with ASME B18.3 standards, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and reliability in global industrial markets.