S-92210A566 1/4"-20 x 5" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise thread engagement with UNC coarse threading and Class 3A fit ensuring reliable, vibration-resistant connections
• Efficient installation featuring a hex drive design (5/32") for secure tool grip and reduced cam-out risk
• Optimal flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Full-length threading providing maximum grip and load distribution across the entire 5" length
• Regulatory compliance meeting ASME B18.3 standards and environmental directives (RoHS 3, REACH)

Professional Applications & Engineering Value

This 1/4"-20 x 5" stainless steel flat head screw is engineered to address critical industrial fastening challenges. The 18-8 stainless steel material combined with a passivated finish delivers exceptional resistance to corrosion and chemical exposure, making it suitable for machinery, marine equipment, and outdoor structures. Its UNC coarse threading and Class 3A thread fit provide superior holding power in soft materials and reduce cross-threading risks during assembly. The hex drive design ensures high torque application without slippage, while the 82° countersink angle allows for seamless integration in precision applications requiring flush surfaces. These features make it an ideal industrial fastener for construction, automotive, and heavy equipment sectors where reliability and durability are paramount.

Specification Summary & Compliance

This fastener maintains precise Class 3A thread fit tolerances with UNC coarse threading (1/4"-20) and full threading along its 5" length. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both performance reliability and regulatory adherence for global industrial use.