S-92210A417 6-40 x 1" ASME B18.3 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 for extended service life in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant connections in critical assemblies
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Optimal flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Efficient installation using 5/64" hex drive for secure tool engagement and reduced installation time
• Full threading capability providing maximum grip along the entire 1" length for superior holding power
• Regulatory compliance meeting ASME B18.3 standards and RoHS/REACH requirements for global industrial use

Professional Applications & Engineering Value

These 6-40 UNF flat head screws deliver exceptional engineering value in precision assemblies where corrosion resistance and thread reliability are critical. The combination of 18-8 Stainless Steel material with passivated finish provides superior protection against chemical exposure and environmental factors, while the Class 3A thread fit with fine thread spacing ensures tight tolerances for vibration-prone applications. The 82° countersink angle and flat head profile enable seamless integration in aerospace components, electronic enclosures, and precision machinery where flush surface requirements are mandatory. These fully threaded fasteners with right-hand thread direction offer maximum clamping force distribution, making them ideal for high-stress industrial applications requiring 70,000 psi tensile strength and consistent performance under load.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNF thread type and fine thread spacing specifications. These flat head screws comply with ASME B18.3 manufacturing standards and feature full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 1" length and dimensional specifications maintain precision consistency across production batches for reliable industrial fastener performance.