S-91273A939 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications.
• Enhanced wear resistance due to Rockwell B55 hardness, extending service life and reducing replacement frequency.
• Secure and precise assembly with Class 2A thread fit and fine UNF threads, ensuring tight, vibration-resistant connections.
• Easy installation and removal featuring a knurled socket head with 5/32" hex drive for improved grip and torque application.
• Durable black oxide finish provides added protection against oxidation and aesthetic consistency in assemblies.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global industrial use.

Professional Applications & Engineering Value

This 5/16"-24 UNF shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, while the black oxide finish enhances durability in high-moisture or chemically aggressive settings. The fine UNF threads and Class 2A fit provide superior clamping force and vibration resistance, essential for applications like rotating shafts, pivots, and assembly jigs where alignment and stability are paramount. The knurled socket head with a 5/32" hex drive allows for efficient torque transmission, reducing installation time and minimizing tool slippage. Ideal for use in automotive, aerospace, and manufacturing sectors, this shoulder screw ensures long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNF thread standards with a Class 2A thread fit for precise dimensional accuracy. Key specifications include a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent performance in assembly. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety requirements for industrial components.