S-91273A189 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction for long-lasting performance in harsh industrial environments.
• Enhanced installation security thanks to the knurled hex socket head design, providing excellent grip and reducing tool slippage.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable load-bearing capacity in demanding applications.
• Precise alignment and smooth rotation due to the standard shoulder fit and fine UNF threading, minimizing wear on mating components.
• Consistent dimensional accuracy with Class 2A thread fit, guaranteeing reliable assembly and interchangeability.
• Durable material hardness rated at Rockwell B55, offering excellent resistance to deformation under stress.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains.

Professional Applications & Engineering Value

This 5/16"-24 UNF fine thread shoulder screw is engineered to solve critical alignment and durability challenges in precision assemblies. The 18-8 Stainless Steel material provides excellent corrosion resistance, essential for machinery exposed to moisture or chemicals. The knurled hex socket head ensures secure, high-torque installation without cam-out, while the fine UNF threading and Class 2A fit deliver precise engagement and vibration resistance. The shoulder diameter and length maintain accurate part spacing and rotational alignment in applications like pivots, guides, and rotating shafts, reducing wear and extending equipment life. Ideal for industrial automation, automotive, and electronics manufacturing, this shoulder screw offers reliable performance where dimensional stability and strength are paramount.

Specification Summary & Compliance

This shoulder screw features a 5/16"-24 UNF fine thread with Class 2A dimensional tolerance for precise fit. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and shoulder length is 1/4" with a tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.