S-91410A581 5/16"-18 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 precision cup point design that bites into materials to prevent loosening under vibration and heavy loads.
- Exceptional durability from high-strength steel construction and a Rockwell B80 hardness rating, ensuring long service life in demanding environments.
- Easy and secure installation using the external square drive and square head, which provides a positive grip for high-torque applications without cam-out.
- Reliable coarse threading (UNC) and Class 2A thread fit for faster assembly and consistent performance in a wide range of materials.
- Broad industrial compliance, meeting ASME B18.6.2 specifications for dimensional accuracy and being RoHS 3 & REACH compliant for safe use.
- Optimized for machinery and equipment with a 3/4" length and 5/16"-18 thread size, offering a versatile fastening solution for shafts, collars, and gears.
Professional Applications & Engineering Value
This square head set screw is engineered to solve critical fastening challenges in industrial machinery, where vibration resistance and positional security are paramount. The steel construction and Rockwell B80 hardness provide the necessary strength to withstand repetitive stress, while the cup point design concentrates force to create a permanent indentation in the mating part, effectively locking components like gears and pulleys onto shafts. The UNC coarse thread and Class 2A thread fit ensure quick and reliable installation, reducing assembly time. The external square drive allows for high torque application with common tools, making it an ideal fastening solution for maintenance and production lines where reliability cannot be compromised.
Specification Summary & Compliance
This set screw features a 5/16"-18 UNC thread with a Class 2A thread fit for standard industrial tolerances and a right-hand thread direction. It is manufactured in compliance with ASME B18.6.2 standards, ensuring dimensional accuracy and performance. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.
