S-91773A541 1/4"-20 x 7/8" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round Head Phillips 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
- High tensile strength of 100,000 psi ensures reliable load-bearing capacity and joint integrity
- Class 2A thread fit provides consistent assembly performance and reduces cross-threading risks
- Fully threaded UNC coarse design delivers faster installation and stronger holding power
- Phillips No. 3 drive offers secure tool engagement and reduced cam-out during high-torque applications
- Rounded head profile minimizes snagging and provides a finished appearance for visible assemblies
- Compliance with ASME B18.6.3, RoHS, and REACH guarantees quality, safety, and environmental responsibility
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 18-8 stainless steel rounded head screws combine material durability with precision manufacturing to address critical assembly challenges. The passivated finish significantly enhances corrosion resistance, making them suitable for outdoor equipment, marine components, and chemical processing facilities where moisture and corrosive agents are present. With a fully threaded 1/4"-20 UNC coarse thread and Class 2A fit, they ensure rapid installation and reliable clamping force in machinery, enclosures, and structural frameworks. The Phillips No. 3 drive facilitates efficient driving while the rounded head design reduces stress concentrations, providing both functional reliability and aesthetic appeal in visible applications.
Specification Summary & Compliance
This screw meets ASME B18.6.3 specifications for dimensional accuracy and performance, featuring a Class 2A thread fit for consistent assembly tolerance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. The product maintains precise thread geometry with UNC coarse threading and is manufactured from 18-8 stainless steel with a passivated finish for enhanced durability.
