S-90289A363 3/8"-24 x 5/16" ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh industrial environments.
- Exceptional holding power ensured by Class 3A thread fit, providing tighter tolerances and reduced risk of loosening under vibration.
- High-strength durability with Rockwell C45 hardness, offering reliable performance in heavy-duty applications.
- Secure locking mechanism through serrations that bite into mating surfaces, preventing unintended rotation.
- Easy installation and removal with hex drive design and 3/16" drive size, allowing for efficient tool engagement.
- Precise fine thread spacing (UNF 3/8"-24) for improved load distribution and enhanced grip in critical assemblies.
- Versatile cup tip design that minimizes surface damage while providing concentrated contact pressure for firm seating.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component slippage and fastener failure under dynamic loads. The Class 3A thread fit and fine UNF threading deliver precise engagement, reducing play and enhancing clamp force in machinery, automotive, and aerospace assemblies. The serrations locking type and cup tip work synergistically to resist vibrational loosening while minimizing marring on shafts or hubs. With a Rockwell C45 hardness, it withstands high-stress conditions, making it ideal for permanent or semi-permanent fastening in heavy-duty applications where reliability and compliance with ASME B18.3 standards are critical.
Specification Summary & Compliance
This set screw features a 3/8"-24 UNF thread with Class 3A precision fit for tight tolerances and optimal performance. It adheres to ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability. Dimensions include a length of 5/16" and a drive size of 3/16" for consistent application across inch-system projects.
