S-91943A601 3/8"-16 x 3/4" Set Screws

Key Features & Benefits at a Glance

• Enhanced Grip & Alignment: Permanent swivel tip with 9° maximum angle ensures secure contact and compensates for minor misalignments in industrial assemblies.
• Superior Corrosion Resistance: Black-oxide finish on alloy steel provides a durable protective layer, extending service life in demanding environments.
• High-Strength Fastening: Rockwell C39 hardness rating guarantees exceptional resistance to wear and deformation under heavy loads.
• Efficient Installation & Removal: 3/16" hex drive allows for high-torque application with standard tools, speeding up assembly and maintenance.
• Reliable Thread Engagement: Class 2A thread fit for UNC coarse threads ensures consistent, secure fastening with standard mating components.
• Space-Saving Design: Headless construction is ideal for applications where a protruding fastener head is not feasible.
• Global Compliance Assurance: Meets RoHS 3 and REACH regulations, making it suitable for international supply chains and environmentally conscious industries.

Professional Applications & Engineering Value

This 3/8"-16 UNC set screw is engineered to address critical challenges in power transmission, machinery, and precision equipment assembly. The black-oxide alloy steel construction combats rust and wear, while the permanent swivel tip maintains constant pressure on shafts or collars, preventing loosening from vibration—a common failure point in dynamic systems. The coarse thread spacing and Class 2A thread fit provide rapid installation and reliable holding power, reducing assembly time and maintenance intervals. Its headless design and hex drive make it indispensable for confined spaces where flush mounting and tool access are paramount, ensuring long-term operational integrity in automotive, aerospace, and heavy machinery applications.

Specification Summary & Compliance

This set screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It is manufactured from alloy steel and features a black-oxide surface treatment for enhanced durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent international environmental and safety standards for industrial use.