S-90291A619 3/8"-16 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure Anti-Loosening Performance - Nylon 6/6 tip maintains consistent locking force under vibration, preventing unintentional back-out in dynamic applications
• Precision Thread Engagement - Class 3A thread fit ensures tight tolerances for superior clamping force and reliable positioning accuracy
• Corrosion-Resistant Construction - 18-8 stainless steel material provides excellent resistance to rust and chemical exposure in harsh industrial environments
• Wide Temperature Compatibility - Nylon tip operates effectively from -50° to 250°F, maintaining performance across diverse operating conditions
• Optimized Drive Efficiency - 3/16" hex drive allows for high torque application and secure installation in confined spaces
• Enhanced Surface Protection - Soft nylon tip prevents marring and damage to sensitive shaft surfaces during clamping operations
• Superior Mechanical Strength - Rockwell B80 hardness provides excellent durability and resistance to deformation under heavy loads

Professional Applications & Engineering Value

This hex headless set screw with nylon tip delivers exceptional engineering value in precision assembly applications where component positioning and vibration resistance are critical. The 18-8 stainless steel construction ensures reliable performance in corrosive environments, while the UNC coarse thread design facilitates quick installation and removal. The Class 3A thread fit provides superior clamping force for permanent positioning of gears, pulleys, and collars on shafts. The nylon 6/6 plastic tip offers excellent vibration damping characteristics, making it ideal for rotating machinery, automotive assemblies, and industrial equipment where maintaining precise alignment is essential. The headless design allows for flush mounting in applications where protruding fastener heads are not feasible.

Specification Summary & Compliance

This 3/8"-16 UNC set screw features Class 3A thread fit for precision applications with coarse thread spacing and right-hand thread direction. Manufactured to ASME B18.3 specifications with Rockwell B80 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The nylon tip maintains dimensional stability across the specified temperature range of -50° to 250°F.