S-90969A190 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with 140,000 psi tensile strength and Rockwell C30 hardness for reliable performance in high-stress applications
• Superior corrosion resistance through black oxide finish, extending service life in demanding industrial environments
• Precision thread engagement with Class 3A fit and 1/4"-20 UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized installation control featuring ultra-low knurled socket head and 5/32" hex drive for slip-resistant torque application
• Accurate component alignment with 5/16" shoulder diameter and 1/4" shoulder length maintaining precise part positioning
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Enhanced grip and handling through knurled head texture facilitating manual installation in confined spaces

Professional Applications & Engineering Value

This alloy steel shoulder screw delivers critical engineering solutions for precision assembly applications where component alignment and rotational stability are paramount. The Class 3A thread fit with 1/4"-20 UNC coarse threads provides superior vibration resistance in machinery, automation systems, and rotating assemblies. The black oxide finish offers enhanced corrosion protection while maintaining dimensional stability in industrial environments. The ultra-low knurled socket head design enables secure installation in space-constrained applications while the precisely machined shoulder maintains accurate bearing surfaces and pivot points. These shoulder screws are engineered to withstand repetitive loading conditions while maintaining alignment integrity in precision equipment, manufacturing jigs, and mechanical linkages.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit and UNC thread specifications. Shoulder diameter tolerance maintained at -0.004" to -0.002" with shoulder length tolerance of -0.005" to 0.005" for consistent performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The alloy steel construction meets industrial strength requirements with 140,000 psi tensile strength capability.