S-90276A559 1/4"-28 x 3/4" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round 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, extending service life in demanding industrial environments
- Precise thread engagement with Class 2A thread fit and UNF fine threading for secure, vibration-resistant fastening
- High mechanical strength with 60,000 PSI tensile strength and Rockwell B69 hardness for reliable load-bearing performance
- Easy manual installation with standard slotted drive design compatible with common screwdrivers
- Full-thread coverage along the 3/4" length ensures maximum grip and uniform stress distribution
- Regulatory compliance meets ASME B18.6.3 manufacturing standards and environmental regulations (RoHS 3, REACH)
- Versatile rounded head profile provides smooth surface finish while maintaining adequate torque transmission
Professional Applications & Engineering Value
Engineered for industrial machinery assembly and precision equipment manufacturing, this zinc-plated steel slotted screw addresses critical fastening challenges where corrosion resistance and mechanical reliability are paramount. The 1/4"-28 UNF fine threading delivers superior resistance to vibrational loosening compared to coarse threads, while the Class 2A thread fit ensures consistent engagement without binding. The combination of 60,000 PSI tensile strength and Rockwell B69 hardness provides exceptional durability against shear forces and fatigue in right-hand thread applications. The fully threaded design maximizes contact surface area, distributing clamping forces evenly across connected components for enhanced joint integrity in rounded head fastener installations.
Specification Summary & Compliance
This 3/4" length screw features precision Class 2A thread fit with 1/4"-28 UNF fine threading manufactured to ASME B18.6.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Thread direction is standardized as right-hand with complete threading along the entire shank length.
