S-90272A541 1/4"-20 x 7/8" 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 fastening under substantial mechanical loads
• Class 2A thread fit provides consistent engagement and smooth assembly in production environments
• Rockwell B70 hardness maintains structural integrity and prevents thread deformation during installation
• Full threading design offers maximum grip length and uniform stress distribution
• No. 3 Phillips drive enables efficient installation with standard industrial tools
• Coarse UNC threads deliver rapid assembly and reduced cross-threading risks

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel screws combine corrosion protection with high tensile strength to solve critical fastening challenges. The rounded pan head profile with Phillips drive provides secure seating and prevents tool slippage during high-torque installations. Coarse UNC threading ensures quick assembly in metal fabrication, machinery assembly, and structural frameworks where vibration resistance is crucial. The fully threaded design maintains consistent clamping force across the entire 7/8" length, making them ideal for applications requiring uniform load distribution and reliable performance in corrosive environments.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC 1/4"-20 coarse threading. Fully compliant with ASME B18.6.3 manufacturing specifications, ensuring dimensional accuracy and performance reliability. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use. The zinc-plated steel construction provides consistent 60,000 psi tensile strength and Rockwell B70 hardness across all production batches.