S-90273A146 6-32 x 3/8" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable fastening under stress
• Effortless installation with Phillips No. 2 drive and standard flat head profile for quick, secure seating
• Optimized thread engagement through full UNC coarse threading and Class 2A fit, reducing cross-threading risks
• Flush surface finishing enabled by 82° countersink angle, ideal for applications requiring smooth assembled surfaces
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for global industrial use
• Versatile inch-system compatibility with 6-32 UNC thread size and 3/8" length for broad equipment integration

Professional Applications & Engineering Value

These zinc-plated steel flat head screws deliver critical reliability in industrial assemblies where vibration resistance and surface alignment are paramount. The fully threaded 6-32 UNC coarse spacing ensures maximum grip in softer materials while the Phillips drive enables efficient high-torque installation. Engineered with a standard 82° countersink, they eliminate protrusion in machinery housings, electronic enclosures, and automotive components. The Class 2A thread fit maintains consistent clamping force while accommodating minor misalignments, reducing assembly time and improving production throughput. Ideal for heavy-duty fastening in manufacturing equipment, conveyor systems, and structural frameworks requiring ASME B18.6.3 compliance.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances ensuring precise interchangeability. The UNC coarse thread system provides optimal performance in most industrial materials while the zinc plating offers sacrificial corrosion protection. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions. Mechanical properties include 60,000 psi minimum tensile strength and Rockwell B70 hardness verified through quality control processes.