S-92210A595 5/16"-18 x 3" 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 Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding applications
• Optimal flush mounting with 82° countersink angle and standard flat head profile for seamless surface finishing
• Enhanced drive stability through hex drive design prevents cam-out during high-torque installation
• Full threading along 3" length offers maximum grip range and adjustment flexibility
• Regulatory compliance meets ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 5/16"-18 UNC flat head screws deliver exceptional engineering value through their 18-8 stainless steel composition and passivated finish, providing superior corrosion resistance that withstands chemical exposure and moisture in industrial environments. The Class 3A thread fit ensures precise mating with components, eliminating play and maintaining alignment in vibration-prone applications. The hex drive configuration allows for high-torque installation without stripping, while the 82° countersink creates flush surfaces critical for machinery, automotive, and structural assemblies where protrusions compromise safety or function. These fully threaded screws distribute clamping force evenly across the entire 3" length, making them ideal for thick material stacks in construction, manufacturing, and heavy equipment applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit for superior dimensional accuracy. Features UNC coarse threading (5/16"-18) with right-hand direction and 0.313" thread diameter. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.