S-95955A226 4-40 x 3/8" Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws
Left-Hand-Thread 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
- Exceptional tensile strength of 80,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Left-hand thread design provides secure fastening in applications where standard right-hand threads may loosen due to rotational forces.
- Hex drive (1/16") allows for easy installation and removal with standard tools, minimizing assembly time and labor costs.
- Class 2A thread fit offers consistent, precise engagement for smooth assembly and reduced cross-threading issues.
- Fully threaded shank maximizes grip and load distribution across the entire length, enhancing joint stability.
- Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory acceptance for global supply chains.
Professional Applications & Engineering Value
This 4-40 UNC left-hand thread rounded button head screw is engineered to address critical challenges in machinery, automotive, and electronics assembly where reverse rotational forces are present. The 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, extending service life in humid or corrosive settings. Its coarse UNC thread and Class 2A fit ensure quick, reliable fastening with minimal risk of stripping, while the rounded button head and hex drive design offer a low-profile, tamper-resistant solution that withstands vibration. Ideal for securing components in conveyor systems, rotating equipment, and left-hand thread applications, this screw delivers consistent performance and reduces maintenance downtime.
Specification Summary & Compliance
This screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured to exact inch system specifications, including a 3/8" length and fully threaded design, it guarantees reliable performance in industrial fastening applications.
