S-90276A563 1/4"-28 x 1 1/2" 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 for extended service life in demanding environments
- Enhanced torque transmission through slotted drive design for reliable installation and maintenance
- High-load capacity with 60,000 psi tensile strength to withstand significant mechanical stress
- Precision thread engagement with UNF fine threading and Class 2A fit for secure, vibration-resistant connections
- Optimized head design featuring rounded profile for reduced surface protrusion and improved safety
- Full threading capability ensuring maximum grip length and uniform load distribution
- Regulatory compliance meeting ASME B18.6.3 standards for consistent quality and performance
Professional Applications & Engineering Value
This zinc-plated steel round head screw delivers exceptional performance in industrial settings where corrosion resistance and mechanical reliability are paramount. The UNF fine thread configuration provides superior resistance to vibrational loosening, making it ideal for machinery, equipment assembly, and automotive applications. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these fasteners maintain structural integrity under heavy loads and repeated stress cycles. The slotted drive style offers compatibility with standard tools while the rounded head profile minimizes snagging hazards in exposed installations. These fully threaded screws are engineered to replace inferior fasteners in critical joints where failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precise engagement. Features 1/4"-28 UNF fine threads in right-hand direction with full threading along the 1-1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The zinc-plated surface treatment provides additional corrosion protection while maintaining the mechanical properties of the underlying steel substrate.
