S-91410A540 1/4"-20 x 3/4" ASME B18.6.2 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 a cup point tip that bites into materials for secure, vibration-resistant fastening.
- High-strength steel construction with a Rockwell B80 hardness rating ensures excellent durability and resistance to wear and deformation.
- Precise Class 2A thread fit provides reliable engagement and ease of assembly, reducing the risk of cross-threading.
- Coarse UNC thread design allows for faster installation and is less susceptible to clogging in demanding environments.
- External square drive and square head enable high-torque application with standard tools, preventing cam-out for efficient installation.
- Compliant with ASME B18.6.2 standards, ensuring consistent quality, dimensional accuracy, and interchangeability.
- RoHS 3 and REACH compliant for safe use in regulated industries, meeting environmental and health safety standards.
Professional Applications & Engineering Value
This 1/4"-20 UNC steel set screw is engineered to solve critical fastening challenges in industrial settings. Its cup point design creates a permanent, high-friction lock by concentrating pressure on a small contact area, effectively preventing components from loosening under vibration—a common issue in machinery, automotive assemblies, and power transmission systems. The coarse thread and Class 2A fit ensure quick, reliable installation even in softer materials or where debris is present. Manufactured from high-strength steel and heat-treated to a Rockwell B80 hardness, it maintains its integrity under repeated stress, making it an ideal choice for securing collars, gears, and pulleys on shafts where precision and holding strength are paramount.
Specification Summary & Compliance
This set screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. The dimensional specifications, including a 3/4" length, 1/4" head width, and 3/16" head height, are manufactured in compliance with the ASME B18.6.2 standard. It is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
