S-92205A537 1/4"-20 x 1/2" Sealing Hex Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated silicone rubber O-ring creates a reliable seal in high-pressure environments up to 20,000 psi, preventing leaks in critical applications.
• Exceptional Corrosion Resistance: 18-8 stainless steel construction provides excellent durability against rust and chemical exposure in harsh industrial settings.
• High Tensile Strength: Withstands up to 80,000 psi tensile loads, ensuring structural integrity under extreme mechanical stress.
• Wide Temperature Tolerance: O-ring maintains sealing effectiveness across a broad temperature range from -80° to 400°F for versatile application use.
• Precision Thread Fit: Class 2A UNC coarse threads ensure easy installation and secure fastening with consistent engagement.
• Optimized Drive Design: External hex head with 7/16" width provides superior torque transmission and tool accessibility.
• Full Thread Engagement: Completely threaded 1/2" length maximizes holding power and distribution of load forces.

Professional Applications & Engineering Value

This 1/4"-20 UNC hex head screw delivers critical sealing solutions for industrial equipment exposed to high-pressure fluids and gases. The 18-8 stainless steel core provides corrosion resistance in marine, chemical processing, and outdoor applications, while the silicone rubber O-ring maintains seal integrity across extreme temperature fluctuations from cryogenic to high-heat environments. Engineers specify this external hex drive fastener for hydraulic systems, pressure vessels, and pneumatic equipment where 20,000 psi maximum pressure rating ensures operational safety. The Class 2A thread fit with coarse UNC threading enables rapid assembly in production lines while preventing cross-threading issues, making it ideal for maintenance-critical applications requiring reliable, repeatable performance.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specification. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory adherence for global industrial applications. The fully threaded design maintains consistent engagement while the Rockwell B85 hardness provides optimal balance between strength and machinability.