S-99117A930 1/4"-20 x 12" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B70 hardness provides excellent durability and resistance to wear during installation
• UNC coarse threading with Class 2A fit enables faster assembly and reduced cross-threading risks
• Phillips No. 3 drive design offers secure tool engagement and efficient installation
• Partial threading configuration allows for precise clamping force control in multi-material applications
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH standards ensures regulatory acceptance

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws deliver exceptional engineering value for industrial applications requiring corrosion resistance and structural integrity. The 1/4-20 UNC coarse thread configuration provides superior holding power in wood, metal, and composite materials, while the partial threading design prevents material damage in sensitive assemblies. The pan head profile with Phillips No. 3 drive ensures flush mounting and reliable torque transmission, making these industrial screws ideal for machinery, equipment manufacturing, and structural frameworks where vibration resistance and long-term reliability are critical. The combination of 60,000 psi tensile strength and Rockwell B70 hardness addresses common failure points in heavy-duty applications, providing engineers with a dependable fastening solution that maintains performance under demanding conditions.

Specification Summary & Compliance

This product features precision Class 2A thread fit with UNC coarse threading meeting ASME B18.6.3 manufacturing specifications. The 1/4-20 thread size with 12-inch length and partial threading ensures dimensional accuracy for industrial applications. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted substances. The manufacturing process adheres to ASME B18.6.3 standards for dimensional consistency and performance reliability.