S-95289A135 1/4"-20 x 1/4" 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 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
- Precise thread engagement thanks to Class 3A thread fit, minimizing backlash and providing secure fastening in demanding applications.
- Extended tip design allows for deeper penetration and improved grip on shafts or components, reducing slippage.
- High durability with Rockwell B80 hardness, offering excellent wear resistance and repeated use without deformation.
- Easy installation and removal using a standard 1/8" hex drive, saving time and reducing tooling complexity.
- Reliable performance with coarse UNC threads, enabling quick assembly and resistance to vibration loosening.
- Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
Professional Applications & Engineering Value
This 1/4"-20 UNC hex headless set screw is engineered for precision industrial applications where space constraints and vibration resistance are critical. Made from 18-8 Stainless Steel, it combats corrosion in environments like marine, chemical processing, and outdoor machinery, extending service life. The extended tip enhances grip on rotating shafts or pulleys, preventing misalignment in assemblies. With a Class 3A thread fit and coarse thread spacing, it ensures rapid installation and maintains tight tolerances under dynamic loads, reducing maintenance needs. Ideal for securing gears, collars, and knobs in automotive, aerospace, and manufacturing equipment, this screw delivers reliable right-hand thread performance backed by stringent manufacturing controls.
Specification Summary & Compliance
This set screw features precise dimensions, including a thread size of 1/4"-20 UNC with Class 3A thread fit for high accuracy, and tolerances such as tip length (-0.005" to 0") and tip diameter (-0.007" to 0"). It complies with ASME B18.3 specifications for consistent performance, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence in industrial use.
