S-95861A112 4-40 x 1/4" Venting Stainless Steel Button Head Hex-Drive Screws
Venting Stainless Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
- High tensile strength of 80,000 PSI ensures reliable performance under heavy loads and vibration.
- Class 3A thread fit provides superior precision and secure fastening in demanding applications.
- Vented design with 0.044" diameter prevents pressure buildup and allows for easier installation in sealed systems.
- Fully threaded shank offers maximum grip and uniform stress distribution along the entire length.
- Hex drive (1/16") enables high torque application and reduces the risk of stripping during assembly.
- RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
These 4-40 UNC thread rounded head screws are engineered to address critical challenges in precision assembly and corrosive environments. The 18-8 stainless steel material, combined with a Rockwell B81 hardness, ensures long-term durability against wear and chemical exposure. The coarse thread spacing and Class 3A thread fit provide rapid installation and vibration resistance, making them ideal for electronics, automotive, and machinery where reliability is paramount. The vented screw feature eliminates air or fluid entrapment, preventing system failure in pressurized applications. With a fully threaded design and right-hand thread direction, these screws deliver consistent clamping force and are suited for high-stress industrial fastening tasks.
Specification Summary & Compliance
This product adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. Key specifications include a 1/4" length, 0.112" thread diameter, and coarse thread spacing. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.
