S-95861A131 1/4"-20 x 1/2" Venting Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B81 hardness for reliable performance under high stress
• Precise thread engagement with Class 3A thread fit ensuring secure, vibration-resistant connections in demanding applications
• Efficient installation and removal using a 5/32" hex drive, providing superior torque transfer and reducing tool slippage
• Pressure equalization capability through the 0.067" vent diameter, preventing pressure buildup in sealed assemblies
• Wide compatibility with UNC coarse thread standards, offering quick assembly and reliable performance in various materials
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head screws deliver critical performance advantages in industrial settings where corrosion resistance and mechanical reliability are paramount. The fully threaded UNC coarse spacing design ensures rapid assembly and superior holding power in metals, plastics, and composite materials. The vented screw feature addresses common pressure differential issues in enclosed systems, preventing seal failure and maintaining system integrity. With their Class 3A thread fit and hex drive compatibility, these fasteners provide consistent clamping force in automotive assemblies, electrical enclosures, machinery guards, and HVAC systems where vibration resistance and long-term durability are essential.

Specification Summary & Compliance

This fastener maintains Class 3A thread fit tolerance per UNC standards with precise dimensional control. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The 1/4"-20 UNC coarse thread specification guarantees interchangeability with standard components, while the fully threaded design provides consistent engagement across the entire fastener length for optimal load distribution.