S-90298A799 1/2"-13 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
• Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and positioning through Class 3A thread fit and controlled shoulder diameter tolerances
• Secure installation and removal with 5/16" hex drive socket and knurled head for enhanced grip
• Reliable performance in high-vibration settings thanks to coarse UNC threads and Rockwell B55 hardness
• Full regulatory compliance meeting ASME B18.3 specifications, RoHS 3, and REACH standards
• Optimized for repetitive use with standardized shoulder fit and right-hand thread design

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw delivers critical engineering solutions where precision alignment and high tensile strength are paramount. The 1/2"-13 UNC coarse thread configuration ensures rapid assembly in machinery, automotive, and aerospace components while resisting vibration loosening. The 5/16" hex drive socket combined with the knurled head provides superior torque transmission and handling in confined spaces. With its Class 3A thread fit and controlled shoulder tolerances, it maintains exact positioning in rotating assemblies, bearing mounts, and precision instruments, reducing wear and minimizing maintenance cycles across industrial applications.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit and inch system measurements. Features include: 1/2"-13 UNC coarse threads, 5/16" hex drive, shoulder diameter tolerance of -0.004" to -0.002", and shoulder length tolerance of -0.005" to 0.005". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.