S-91772A877 1/4"-20 x 1 7/8" 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 industrial environments
• Exceptional tensile strength rated at 70,000 psi for reliable performance in demanding applications
• Precise Class 2A thread fit ensures smooth installation and secure fastening with UNC coarse threading
• Optimized drive engagement with Phillips No. 3 drive for efficient installation and reduced cam-out risk
• Full threading design provides maximum grip length and uniform load distribution
• Regulatory compliance with RoHS, REACH, and ASME B18.6.3 standards for quality assurance
• Versatile pan head design offers excellent bearing surface and professional appearance

Professional Applications & Engineering Value

This 1/4"-20 UNC machine screw delivers critical engineering advantages for industrial assembly applications. The passivated 18-8 stainless steel construction provides exceptional corrosion resistance, making it suitable for environments exposed to moisture, chemicals, and varying temperatures. The coarse thread configuration ensures rapid installation and reliable performance in materials where fine threads might strip or fail. With its fully threaded design and 70,000 psi tensile strength, this Phillips drive screw maintains structural integrity under vibration and heavy loads. The pan head profile offers an optimal bearing surface for secure fastening in machinery, equipment manufacturing, and structural applications where ASME B18.6.3 compliance is required for quality assurance and interoperability.

Specification Summary & Compliance

This 1/4"-20 machine screw features Class 2A thread fit tolerance for precise engagement and meets ASME B18.6.3 manufacturing specifications. The UNC coarse thread with right-hand direction provides standardized compatibility across industrial applications. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in various markets. The screw maintains dimensional accuracy with 1-7/8" length and 0.492" head diameter for consistent performance in rounded head screw applications.