S-95861A113 4-40 x 3/8" 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 industrial environments.
• High tensile strength of 80,000 psi ensures reliable fastening under heavy loads and vibration.
• Class 3A thread fit provides precise, secure engagement for reduced loosening in critical assemblies.
• Vented design with 0.044" diameter allows pressure equalization, preventing seal damage in enclosed systems.
• Hex drive (1/16") offers easy installation and high torque application without cam-out.
• Fully threaded 4-40 UNC coarse thread delivers maximum grip and faster installation in various materials.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

These 4-40 UNC rounded head screws are engineered for demanding applications where precision and durability are critical. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making them suitable for electronics, automotive, and marine assemblies. The coarse thread design ensures quick, secure fastening in plastics and soft metals, while the vented feature prevents pressure buildup in sealed enclosures, reducing failure risks. With a Rockwell B81 hardness and 80,000 psi tensile strength, these screws maintain integrity under stress, offering long-term reliability in industrial screw applications where vibration and load are concerns.

Specification Summary & Compliance

This product adheres to UNC thread standards with a Class 3A thread fit for high precision. Dimensions include a 3/8" length, 0.213" head diameter, and right-hand threading. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted substances are used. Manufactured to meet industrial specifications for fully threaded screws with consistent performance.