S-90283A117 4-40 x 1 1/4" ASME B18.6.3 Steel Pan Head Slotted Screws
Steel Pan Head Slotted 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 zinc-plated steel construction, ensuring long-lasting performance in harsh industrial environments
- High tensile strength of 60,000 psi provides reliable holding power for demanding heavy-duty applications
- Rockwell B60 hardness delivers exceptional durability and resistance to wear during installation and use
- Class 2A thread fit enables smooth assembly while maintaining secure fastening integrity
- Fully threaded design offers maximum engagement and consistent clamping force across the entire length
- Slotted drive compatibility allows for quick installation with standard screwdrivers, reducing assembly time
- Comprehensive regulatory compliance including ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental safety
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws are engineered to address critical fastening challenges in industrial settings. The pan head design with slotted drive provides excellent torque transmission while the coarse thread spacing ensures rapid installation in various materials. The zinc plating creates a protective barrier against corrosion, making these fully threaded screws ideal for outdoor equipment, machinery assemblies, and electronic enclosures where environmental factors pose a threat. With their 1-1/4" length and right-hand thread direction, they offer versatile application across manufacturing, automotive, and construction industries where reliable, high-strength fastening solutions are essential for maintaining structural integrity and operational safety.
Specification Summary & Compliance
These rounded head screws feature precise Class 2A thread fit according to UNC thread standards with coarse thread spacing for optimal performance. Manufacturing specifications strictly adhere to ASME B18.6.3 standards for dimensional accuracy and quality assurance. The products are fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meet REACH (EC 1907/2006) requirements for chemical safety, ensuring they can be used in regulated industries and international markets without compliance concerns.
