S-92198A115 1/4"-28 x 2 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• Class 2A thread fit provides consistent, smooth assembly while maintaining secure fastening
• Partially threaded design allows for precise clamping force control and reduced thread galling
• External hex drive with 7/16" head width enables high-torque installation with standard tools
• UNF fine threading (1/4"-28) offers better vibration resistance than coarse threads in dynamic applications
• Full regulatory compliance including RoHS 3 and REACH for global market acceptance

Professional Applications & Engineering Value

This 1/4"-28 UNF hex head screw delivers exceptional engineering value in demanding applications where corrosion resistance and mechanical strength are critical. The 18-8 stainless steel composition provides excellent protection against rust and chemical exposure, making it ideal for marine equipment, food processing machinery, and outdoor industrial installations. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening in vibrating systems. With 80,000 psi tensile strength and Rockwell B70 hardness, this fastener maintains structural integrity in heavy-duty assemblies while the UNF fine thread configuration ensures superior vibration resistance compared to coarse-thread alternatives. The external hex drive facilitates high-torque installation in confined spaces, streamlining assembly processes across manufacturing, construction, and equipment maintenance applications.

Specification Summary & Compliance

This hex head screw features Class 2A thread fit per UNF standards, ensuring precise dimensional accuracy and reliable mating with corresponding nuts. Manufacturing complies with ASME B18.2.1 specifications for dimensional consistency and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for international industrial markets and environmentally conscious applications.