S-91273A614 5/16"-24 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from Rockwell B55 hardness, ensuring long service life under repetitive loads.
• High tensile strength of 70,000 psi and minimum shear strength of 35,000 psi for reliable performance in demanding applications.
• Precise shoulder fit and alignment with standard shoulder diameter and length tolerances, reducing assembly errors.
• Secure, non-slip installation thanks to the knurled socket head and hex drive, allowing for high torque application.
• Fine UNF thread spacing (5/16"-24) provides better vibration resistance and tighter fastening in precision assemblies.
• Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory acceptance for global supply chains.

Professional Applications & Engineering Value

This 5/16"-24 UNF shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. The 18-8 stainless steel material, combined with a black oxide finish, offers excellent resistance to corrosion and oxidation, making it suitable for automotive, machinery, and outdoor equipment where moisture and chemicals are present. The fine thread spacing and Class 2A thread fit ensure secure, vibration-resistant connections in assemblies requiring precise positioning, such as rotating shafts, gears, and pivoting mechanisms. The knurled socket head allows for easy, high-torque installation with standard hex tools, reducing slippage and improving workflow efficiency in production lines. Its robust 70,000 psi tensile strength and 35,000 psi shear strength provide reliable performance under dynamic loads, minimizing failure risks and maintenance downtime.

Specification Summary & Compliance

This shoulder screw adheres to UNF fine thread standards with a 5/16"-24 thread size and Class 2A thread fit for precise dimensional accuracy. The shoulder features a diameter of 5/16" with a tolerance of -0.004" to -0.002" and a length of 3/8" with a tolerance of -0.005" to 0.005", ensuring consistent fit in standard applications. Manufactured from 18-8 stainless steel with a black oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally safe and regulated industrial use.