S-90292A124 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 130,000 psi tensile strength and 65,000 psi shear strength for reliable performance in demanding applications
• Superior corrosion resistance thanks to 17-4 PH Stainless Steel construction, ideal for harsh industrial environments
• Precise alignment and positioning with Class 3A thread fit and controlled shoulder diameter tolerances (-0.004" to -0.002")
• Easy installation and removal featuring a knurled socket head with 5/32" hex drive for secure tool engagement
• Industry-standard compliance meeting ASME B18.3 specifications for consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized load distribution through the 3/4" shoulder length providing stable bearing surfaces for mechanical assemblies

Professional Applications & Engineering Value

This high-performance shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The 17-4 PH Stainless Steel construction provides excellent corrosion resistance while maintaining Rockwell C28 hardness for long-term durability in challenging environments. The 1/4"-20 UNC coarse thread with Class 3A fit ensures secure fastening with minimal play, while the 3/4" shoulder length serves as precise pivot points, alignment guides, or bearing surfaces in assemblies. The knurled socket head with 5/32" hex drive prevents tool slippage during installation, making it ideal for applications requiring repeated maintenance or adjustments. These shoulder screws are particularly valuable in automation equipment, precision instruments, and mechanical linkages where exact positioning and reliable performance are paramount.

Specification Summary & Compliance

This shoulder screw maintains Class 3A thread fit per UNC standards with precise dimensional control including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, the fastener meets rigorous industry standards for dimensional consistency and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.