S-91273A595 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance thanks to Rockwell B55 hardness and black oxide finish
• Reliable high-strength performance with 70,000 psi tensile and 35,000 psi shear strength for demanding applications
• Precise alignment and smooth rotation ensured by the standard shoulder fit and knurled head texture
• Easy installation and removal with hex socket drive and right-hand coarse UNC threads
• Consistent thread engagement provided by Class 2A thread fit for secure fastening
• Environmental and regulatory compliance with RoHS 3 and REACH standards for safe usage

Professional Applications & Engineering Value

This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and rotational stability challenges in industrial machinery, automation systems, and precision equipment. The 18-8 stainless steel material combined with a black oxide finish offers superior corrosion resistance, reducing maintenance needs in humid or corrosive settings. The knurled head enhances grip during manual adjustments, while the standard shoulder diameter ensures precise component positioning without binding. With a coarse thread design and Class 2A fit, it provides quick assembly and reliable performance in high-vibration environments, making it an ideal industrial fastener for applications requiring both strength and accuracy.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise engineering compliance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.