S-92800A370 1/4"-28 x 2 1/4" 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
• Precise Class 2A fine thread fit provides smooth assembly and secure fastening in critical applications
• External hex drive design allows for easy installation with standard tools and high torque application
• Full threading along the 2 1/4" length offers maximum grip and adjustability in various material thicknesses
• Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and 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 material provides excellent protection against rust and chemical exposure, making it suitable for marine, food processing, and outdoor equipment. The fine UNF thread with Class 2A fit ensures precise engagement in tapped holes, reducing the risk of cross-threading while maintaining vibration resistance. The external hex drive enables high torque application without cam-out, perfect for assembly lines and maintenance operations. With full threading across its 2 1/4" length, this fastener offers versatile clamping capability across different material stacks in machinery, structural frameworks, and industrial enclosures.

Specification Summary & Compliance

This hex head screw features 1/4"-28 UNF fine threads with Class 2A thread fit per unified thread standards, ensuring dimensional accuracy and interchangeability. Manufacturing complies with industry standards for inch system fasteners, maintaining precise thread geometry and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial components. Mechanical properties include 80,000 psi tensile strength and Rockwell B70 hardness, verified through quality control processes.