S-91781A550 1/4"-20 x 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 thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- High tensile strength of 80,000 psi ensures reliable performance and joint integrity under significant load and stress.
- Excellent thread engagement with UNC coarse threading and Class 2A fit, providing easier assembly and reduced cross-threading risk.
- Durable Rockwell B80 hardness offers enhanced wear resistance and maintains fastener shape during installation and use.
- Full threading along the 2" length allows for maximum adjustability and secure fastening in a wide range of material thicknesses.
- Standard 82° countersink angle and flat head design enables a flush, clean finish for applications where protrusion is a concern.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees consistent quality, safety, and environmental responsibility.
Professional Applications & Engineering Value
This 1/4"-20 x 2" 18-8 stainless steel flat head screw is engineered to address critical challenges in industrial settings, such as exposure to moisture, chemicals, and high-stress conditions. The passivated finish significantly enhances the innate corrosion resistance of 18-8 stainless steel, making it a dependable choice for machinery, marine equipment, and outdoor structures. Its UNC coarse threads and Class 2A thread fit ensure quick, reliable installation with a lower risk of stripping, which is vital for maintenance efficiency. The combination of 80,000 psi tensile strength and full threading provides exceptional clamping force and versatility, securing components from sheet metal to heavy-duty frames without failure.
Specification Summary & Compliance
This fastener features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard dimensional accuracy and easy assembly. It is manufactured in compliance with the ASME B18.6.3 specification for slotted head screws, ensuring consistent performance and interchangeability. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety regulations for hazardous substances.
