S-92210A161 6-40 x 3/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 and passivated finish, ideal for harsh environments.
- Precise, reliable thread engagement due to Class 3A thread fit and UNF fine thread profile, minimizing the risk of cross-threading.
- High mechanical strength with a tensile strength of 70,000 psi and Rockwell B55 hardness for demanding applications.
- Secure, flush installation enabled by the standard 82° countersink angle and flat head design.
- Efficient installation and removal with a 5/64" hex drive, providing positive torque transfer.
- Maximum grip and holding power from being fully threaded along the entire 3/8" length.
- Guaranteed quality and compliance with ASME B18.3 standards, ensuring dimensional accuracy and performance.
Professional Applications & Engineering Value
This 6-40 UNF flat head screw is engineered to solve critical fastening challenges in precision industries. The combination of 18-8 Stainless Steel and a passivated finish provides exceptional resistance to oxidation and chemical exposure, making it a durable choice for electronics, aerospace assemblies, and medical equipment where reliability is non-negotiable. The Class 3A thread fit and UNF fine thread profile ensure a tight, vibration-resistant connection in tapped holes, preventing loosening in dynamic environments. Its flat head with an 82° countersink allows for a smooth, flush finish, which is crucial for applications with aerodynamic or aesthetic requirements. The hex drive offers superior torque capability compared to slotted drives, reducing the risk of tool slippage and head stripping during high-torque assembly.
Specification Summary & Compliance
This screw adheres to a Class 3A thread fit for high-precision assemblies, manufactured in accordance with the ASME B18.3 standard. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The specified dimensions, including the thread size (6-40 UNF), length (3/8"), and drive size (5/64" hex), are held to strict industrial tolerances for consistent performance.
