S-91772A533 1/4"-20 x 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high stress
• Optimized drive engagement featuring a No. 3 Phillips drive and pan head design for secure installation and reduced cam-out
• Precision thread fit with UNC coarse threads and Class 2A tolerance ensuring consistent, vibration-resistant connections
• Full threading capability along the entire 1/4" length provides maximum grip and uniform clamping force
• Regulatory compliance assurance meeting ASME B18.6.3 specifications while being RoHS 3 and REACH compliant
• Versatile industrial application with right-hand thread direction and standard pan head profile for broad compatibility

Professional Applications & Engineering Value

These passivated 18-8 stainless steel machine screws deliver critical performance advantages in demanding industrial environments. The pan head Phillips design with No. 3 drive size ensures efficient installation while resisting stripping, particularly valuable in high-volume assembly operations. The UNC coarse threading with Class 2A fit provides excellent engagement in various materials, reducing cross-threading risks during repeated installations. The fully threaded construction maximizes contact surface area, distributing stress evenly across the entire fastener length. This combination of corrosion-resistant material and precision engineering makes these screws ideal for machinery, electrical enclosures, and structural applications where reliability and regulatory compliance are paramount.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for consistent performance. Features 1/4"-20 UNC coarse threads with right-hand direction and full threading along the 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness for durable performance in industrial applications.