S-91375A863 1/4"-20 x 1/2" 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
- Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications.
- Enhanced corrosion resistance from zinc plating, extending service life in harsh industrial environments.
- High-strength durability with Rockwell C45 hardness alloy steel, resisting wear and deformation under load.
- Easy installation and removal using the 1/8" hex headless drive, ideal for confined spaces and flush mounting.
- Reliable grip and alignment from the cup point tip, preventing component slippage in assemblies.
- Broad compatibility with UNC coarse threads and 1/4"-20 size, ensuring interchangeability in standard systems.
- Compliance with industry standards like ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4"-20 UNC set screw is engineered to address common industrial challenges such as component loosening due to vibrations and misalignment. Constructed from zinc plated alloy steel, it offers excellent corrosion resistance, making it suitable for machinery, automotive, and electrical enclosures exposed to moisture or chemicals. The headless hex drive design allows for flush installation in tight spaces, while the cup point provides a firm bite into shafts or hubs, enhancing rotational security. With a Class 3A thread fit and coarse threading, it ensures quick assembly and disassembly, reducing downtime in maintenance-heavy operations. Ideal for securing gears, pulleys, and collars, this set screw delivers reliable performance in high-stress environments, backed by Rockwell C45 hardness for long-term durability.
Specification Summary & Compliance
This set screw features precise Class 3A thread fit per UNC standards, with a thread size of 1/4"-20 and coarse spacing for optimal engagement. It complies with ASME B18.3 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in global markets.
