S-91781A077 2-56 x 1/4" 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 offering 80,000 psi tensile strength and Rockwell B80 hardness for reliable, long-term fastening.
- Precision thread engagement with Class 2A fit and UNC coarse threads ensuring easy installation and secure hold.
- Optimized flush mounting featuring a standard flat head with 82° countersink angle for a smooth, unobtrusive surface finish.
- Broad industrial compliance meeting ASME B18.6.3 standards, RoHS 3, and REACH regulations for safe, global use.
- Full-threaded design providing maximum grip length and uniform stress distribution along the entire 1/4" shaft.
- Simple manual installation with a slotted drive, allowing for straightforward assembly with common tools.
Professional Applications & Engineering Value
This 2-56 UNC flat head slotted screw is engineered to address critical challenges in precision assembly and corrosive environments. The 18-8 stainless steel material, enhanced by a passivated finish, resists oxidation and chemical exposure, making it suitable for electronics, aerospace, and marine applications where durability is paramount. Its fully threaded coarse (UNC) design and Class 2A fit facilitate quick, accurate installation while minimizing cross-threading risks. The flat head with 82° countersink ensures a seamless fit in pre-drilled holes, reducing protrusion and improving aerodynamic or aesthetic surfaces. By integrating high tensile strength and compliance with ASME B18.6.3, this screw delivers reliable performance in demanding industrial screws scenarios, from machinery to instrumentation.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including Class 2A thread fit and UNC coarse threading with a size of 2-56 and length of 1/4". It is manufactured in compliance with ASME B18.6.3 specifications and is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence for global supply chains.
