S-91979A724 5/16"-18 x 3/4" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Exceptional holding power due to Class 3A thread fit, ensuring tight, secure fastening in precision assemblies.
• Easy installation and removal with the 5/32" hex drive, providing reliable torque transfer without stripping.
• Effective pressure distribution from the cup tip, minimizing surface damage and improving grip on shafts or components.
• Enhanced functionality with the vented design (0.078" diameter), allowing for pressure equalization or fluid passage in specialized applications.
• Broad compatibility with coarse UNC threads and right-hand direction, matching standard industrial equipment requirements.
• Regulatory peace of mind through RoHS 3 and REACH compliance, supporting safe and sustainable manufacturing practices.

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address critical challenges in industrial fastening, where vibration resistance and long-term reliability are paramount. The 18-8 stainless steel material offers excellent durability against corrosion and wear, making it suitable for machinery, automotive, and electrical enclosures exposed to moisture or chemicals. Its headless design and hex drive allow for flush mounting in confined spaces, while the Class 3A thread fit ensures precise engagement with mating parts, reducing the risk of loosening under dynamic loads. The vented feature adds value in applications requiring airflow or drainage, such as in pneumatic systems or fluid-handling equipment. By combining coarse thread spacing for quick assembly and a cup tip for concentrated clamping force, this screw delivers consistent performance in precision set screw applications, enhancing operational efficiency and reducing maintenance needs.

Specification Summary & Compliance

This set screw adheres to UNC thread standards with a Class 3A thread fit for high precision and tight tolerances. Key dimensions include a thread size of 5/16"-18, length of 3/4", and drive size of 5/32". It features coarse thread spacing and right-hand thread direction for standard compatibility. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.