S-91781A081 2-56 x 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 industrial environments.
- High tensile strength of 80,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Rockwell B80 hardness provides excellent durability and wear resistance, extending service life.
- Class 2A thread fit with UNC coarse threading offers easy installation and secure fastening in various materials.
- 82° countersink angle and flat head design allows for flush mounting, minimizing protrusion and improving aesthetics.
- Full threading and right-hand direction enable consistent grip and straightforward assembly in automated or manual processes.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
These 2-56 UNC flat head slotted screws are engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. Made from 18-8 stainless steel with a passivated finish, they resist rust and oxidation, reducing maintenance costs and downtime. The coarse UNC threads and Class 2A fit provide reliable engagement in metals and plastics, preventing loosening under vibration. Ideal for machinery, electronics, and assembly lines, the flat head with 82° countersink ensures a smooth surface finish, enhancing safety and component integration. With high tensile strength and full threading, they deliver consistent clamping force in industrial screw applications, supporting efficient production and long-term reliability.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading with a diameter of 0.086" and length of 1/2", manufactured to ASME B18.6.3 standards. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.
