S-90807A121 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability with alloy steel construction and black oxide finish providing superior corrosion resistance for harsh industrial environments
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening and vibration resistance in critical applications
• High load-bearing capacity with 140,000 psi tensile strength and Rockwell C32 hardness for demanding mechanical assemblies
• Secure installation and removal with 5/32" hex drive socket and knurled head texture for superior grip and torque transmission
• Optimized shoulder design with 1/4" shoulder length and precise diameter tolerances for accurate component alignment and spacing
• Wide compatibility with 5/16"-18 UNC coarse threads meeting industry standards for various machinery and equipment
• Environmental compliance with RoHS 3 and REACH regulations ensuring safe use across global markets

Professional Applications & Engineering Value

This alloy steel shoulder screw with black oxide finish delivers exceptional performance in precision mechanical applications where alignment and durability are critical. The Class 3A thread fit provides superior engagement in UNC coarse threads, preventing loosening under vibration while maintaining precise tolerances. The knurled socket head with 5/32" hex drive ensures secure tool engagement during installation, reducing stripping risks in high-torque scenarios. Engineered for industrial shoulder screw applications in machinery, automation systems, and precision equipment, the combination of 140,000 psi tensile strength and controlled shoulder dimensions provides reliable pivot points, bearing surfaces, and spacing functions where component alignment is paramount to system performance.

Specification Summary & Compliance

This shoulder screw features precision 5/16"-18 UNC coarse threads with Class 3A thread fit for superior engagement. Critical dimensions include shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" ensuring consistent performance. Manufactured to industry standards with RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, meeting international environmental regulations for industrial components.