S-90291A831 10-32 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with the nylon 6/6 plastic tip that prevents loosening under dynamic loads and protects mating surfaces from damage.
• Exceptional corrosion resistance provided by 18-8 Stainless Steel construction, ensuring long-term reliability in harsh or washdown environments.
• Precise and secure fastening guaranteed by the Class 3A thread fit, offering tighter tolerances for high-strength, reliable connections.
• Wide operational temperature range from -50° to 250° F, making the screw suitable for applications exposed to extreme thermal cycling.
• Easy and secure installation with the 3/32" hex drive and headless design, allowing for flush mounting and access in confined spaces.
• High mechanical strength with a Rockwell B80 hardness, providing excellent durability and resistance to wear and deformation.
• Immediate visual identification of the non-marring tip thanks to the distinctive green color of the nylon component.

Professional Applications & Engineering Value

This 10-32 UNF Class 3A nylon tip set screw is engineered to solve critical challenges in precision assembly and machinery. The 18-8 Stainless Steel body resists corrosion, while the fine UNF thread and Class 3A fit ensure a tight, secure hold in tapped holes, minimizing the risk of thread stripping. The nylon 6/6 tip acts as a resilient locking element, dampening vibrations that cause traditional set screws to back out, making it ideal for industrial equipment, motor shafts, and precision instruments. Its headless design and hex drive facilitate installation in tight spaces, providing a flush finish that enhances safety and aesthetics. This combination of materials and design delivers reliable, long-term performance in demanding commercial and engineering applications.

Specification Summary & Compliance

This set screw features a 10-32 UNF fine thread with a Class 3A thread fit for high precision. It is manufactured in compliance with ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for use in global markets.