S-91781A140 2-56 x 1" 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.
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable, long-lasting fastening.
- Precise flush mounting enabled by the standard 82° countersink angle and flat head design, ensuring a smooth surface finish.
- Easy manual installation and removal with the slotted drive style, providing straightforward tool compatibility.
- Consistent and reliable thread engagement due to the Class 2A thread fit and coarse UNC thread spacing, reducing cross-threading risks.
- Full-length threading for maximum grip and holding power across the entire 1" length in various material thicknesses.
- Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 2-56 UNC Flat Head Slotted Screw is engineered to address common industrial challenges such as vibration loosening and environmental degradation. Constructed from 18-8 Stainless Steel with a passivated finish, it offers excellent resistance to rust and chemical exposure, making it suitable for industrial applications in machinery, electronics, and outdoor equipment. The fully threaded design and coarse thread spacing provide superior holding power in softer materials, while the flat head with an 82° countersink ensures a secure, flush fit that minimizes protrusion and snagging. Its high tensile strength and Class 2A thread fit guarantee reliable performance under stress, reducing maintenance needs and downtime in demanding settings.
Specification Summary & Compliance
This screw features a 2-56 UNC thread size with Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured in accordance with ASME B18.6.3 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer applications without hazardous substances.
