S-91700A255 4-40 x 1/2" ASME B18.6.3 Brass Slotted Oval Head Screws
Brass Slotted Oval 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 with brass construction for long-lasting performance in demanding environments
- Excellent mechanical strength with 50,000 psi tensile strength and Rockwell B50 hardness for reliable load-bearing capability
- Precision thread engagement with Class 2A fit and coarse UNC threading for quick assembly and vibration resistance
- Secure flush mounting with standard oval head profile and 82° countersink angle for smooth surface finishes
- Full threading coverage along the 1/2" length for maximum grip and holding power in various materials
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices
Professional Applications & Engineering Value
These 4-40 UNC brass oval head slotted screws deliver exceptional engineering value across industrial applications where corrosion resistance and reliable fastening are critical. The brass material provides natural resistance to rust and galvanic corrosion, making these flat head screws ideal for electrical components, marine equipment, and plumbing systems. The standard oval head profile with 82° countersink angle ensures flush mounting without protrusion, while the coarse thread spacing and Class 2A thread fit enable rapid installation and secure holding in softer materials. The combination of 50,000 psi tensile strength and Rockwell B50 hardness ensures these fully threaded screws maintain integrity under mechanical stress and vibration, providing long-term reliability in precision assemblies and industrial machinery.
Specification Summary & Compliance
This 4-40 UNC brass oval head slotted screw features precise dimensional accuracy with Class 2A thread fit per UNC standards and 1/2" length with full threading. Manufacturing conforms to ASME B18.6.3 specifications for dimensional consistency and performance reliability. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a)-I and REACH (EC 1907/2006) compliant per the latest substance regulations, ensuring environmental responsibility while maintaining the superior mechanical properties of brass alloy construction.
