S-97768A247 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise Class 3A thread fit ensuring secure fastening and vibration resistance in critical assemblies
• Knurled head texture providing enhanced grip during manual installation and adjustment
• Standard hex drive compatibility with 1/8" drive size for efficient installation using common tools
• Coarse UNC threading enabling quick assembly and reduced cross-threading risks
• Dimensional consistency with tight shoulder diameter and length tolerances for reliable positioning

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw with black oxide finish delivers critical performance advantages in precision machinery, automation systems, and industrial equipment. The Class 3A thread fit and UNC coarse threading provide secure fastening while resisting loosening under vibration, making it ideal for rotating assemblies and positioning applications. The knurled socket head allows for secure tool engagement during installation in confined spaces. With Rockwell B55 hardness and excellent corrosion resistance, this shoulder screw maintains dimensional stability and mechanical integrity in demanding environments including manufacturing equipment, conveyor systems, and precision instruments.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision. Features include: 8-32 UNC coarse thread, 3/8" thread length, 1/4" shoulder diameter with -0.004" to -0.002" tolerance, and 1/2" shoulder length with -0.005" to 0.005" tolerance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial applications.