S-91375A653 3/8"-24 x 2 1/4" ASME B18.3, ASTM F912 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
- Exceptional corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Superior thread engagement and vibration resistance due to UNF fine threads with precise Class 3A fit, ensuring reliable, long-term fastening.
- High-strength performance from Rockwell C45 hardened alloy steel, providing excellent load-bearing capacity and durability.
- Easy installation and removal with the hex drive design, allowing for efficient assembly and maintenance in confined spaces.
- Secure component positioning using the cup tip, which minimizes surface damage and offers strong grip on shafts or hubs.
- Broad regulatory compliance including ASME B18.3, ASTM F912, RoHS 3, and REACH, ensuring safety and environmental standards are met.
- Versatile headless design ideal for applications where a flush surface is required, without protruding parts.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address common industrial challenges such as loosening under vibration and corrosion in harsh conditions. The UNF fine threads with Class 3A fit provide tight tolerances, reducing the risk of backlash and improving alignment in precision assemblies like machinery, automotive components, and electrical enclosures. The hex drive allows for straightforward torque application, even in tight spaces, while the cup tip ensures minimal marring on contacted surfaces. With Rockwell C45 hardness, it withstands heavy loads and repetitive stress, making it a reliable choice for set screw applications demanding high strength and longevity.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision in UNF fine threads, with a thread size of 3/8"-24 and length of 2 1/4". It meets ASME B18.3 and ASTM F912 specifications, ensuring consistent manufacturing quality. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial use.
