S-94105A411 1/2"-20 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
• Exceptional durability from Rockwell C45 hardness alloy steel, resisting wear and deformation under high stress
• Enhanced corrosion resistance with black-oxide coating, extending service life in industrial environments
• Secure, flush installation thanks to the headless hex drive design, preventing snagging and allowing use in confined spaces
• Reliable fine thread engagement with 1/2"-20 UNF threads, providing superior clamping force and reduced loosening risk
• High torque application capability with a 1/4" hex drive, ensuring easy installation and removal with standard tools
• Global compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, regulated use worldwide

Professional Applications & Engineering Value

This 1/2"-20 UNF set screw is engineered to solve critical challenges in precision assembly and machinery. The black-oxide alloy steel construction combined with a Rockwell C45 hardness provides exceptional resistance to shear forces and fatigue, making it ideal for securing collars, gears, and pulleys on shafts in automotive, aerospace, and heavy equipment. The headless design with a hex drive allows for a completely flush mount, eliminating protrusions in compact systems. Its fine thread spacing and Class 3A thread fit ensure minimal backlash and superior vibration resistance, crucial for maintaining alignment in high-speed rotational applications. This set screw delivers reliable performance where precision torque and long-term holding strength are non-negotiable.

Specification Summary & Compliance

This set screw features a 1/2"-20 UNF thread with a Class 3A thread fit for high precision and a flat tip for concentrated clamping force. It is manufactured from alloy steel with a black-oxide finish and complies with ASME B18.3 specifications. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.