S-90291A449 3/8"-24 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure anti-loosening performance with durable green nylon 6/6 plastic tip that prevents damage to mating surfaces and maintains consistent locking force
• Superior corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Precise thread engagement with Class 3A UNF fine threads providing excellent vibration resistance and secure fastening in high-stress applications
• Easy installation and removal through 3/16" hex drive design that allows high torque application without head protrusion in confined spaces
• Wide temperature compatibility with nylon tip operating range of -50° to 250°F, suitable for diverse industrial conditions
• Enhanced durability with Rockwell B80 hardness providing optimal balance of strength and machinability for repeated use
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards for global industrial applications

Professional Applications & Engineering Value

This nylon tip set screw delivers exceptional engineering value in applications requiring secure positioning without surface damage. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery, automotive components, and electrical enclosures exposed to moisture or chemicals. The Class 3A UNF fine threads ensure precise fit and superior vibration resistance in high-speed rotating equipment, while the green nylon 6/6 plastic tip creates consistent locking pressure without marring shafts or precision components. The headless hex drive design allows flush mounting in space-constrained assemblies, making it ideal for adjustable mechanisms, coupling retention, and precision alignment systems where reliability and non-marring properties are critical.

Specification Summary & Compliance

This 3/8"-24 UNF set screw features precise Class 3A thread fit with 0.375" thread diameter and fine thread spacing for optimal engagement. Manufactured to ASME B18.3 specifications with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The fastener maintains dimensional accuracy with 3/4" length, 3/16" hex drive, and consistent Rockwell B80 hardness throughout for reliable performance in industrial applications.