S-99553A179 6-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• Optimized installation control through hex drive design allowing high torque application without head interference
• Enhanced surface protection with oval tip design minimizing damage to shaft components during securement
• Consistent performance standards meeting ASME B18.3 specifications for dimensional accuracy and quality assurance
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industries
• Durable mechanical properties with Rockwell B80 hardness providing excellent resistance to wear and deformation

Professional Applications & Engineering Value

This 316 stainless steel set screw delivers exceptional performance in demanding applications where corrosion resistance and precise positioning are critical. The headless design with hex drive enables flush mounting in confined spaces while providing sufficient torque transmission for secure fastening. Engineered with 6-32 UNC coarse threads and Class 3A fit, this fastener maintains reliable clamping force in right-hand threaded assemblies subject to vibration and dynamic loads. The oval tip configuration distributes contact pressure evenly, preventing galling and surface damage to shafts and collars in precision machinery, automotive components, and marine equipment. With Rockwell B80 hardness, this set screw withstands repeated adjustments without thread deformation, ensuring long-term reliability in industrial maintenance and manufacturing applications.

Specification Summary & Compliance

This inch-system fastener features precise 6-32 UNC coarse threads with Class 3A thread fit tolerance for superior engagement. Manufacturing complies with ASME B18.3 specifications ensuring dimensional accuracy across all critical parameters including thread diameter (0.138") and length (1/4"). The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, making it suitable for use in regulated industries requiring hazardous substance restrictions.