S-92451A113 4-40 x 3/4" ASME B18.6.3 Brass Slotted Flat Head Screws
Brass Slotted Flat 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 from high-quality brass construction, ensuring long-lasting performance in harsh environments
- Reliable fastening strength with 50,000 psi tensile strength and Rockwell B50 hardness for demanding applications
- Precise thread engagement with Class 2A thread fit and UNC coarse threads for secure, vibration-resistant connections
- Easy installation and removal featuring a standard slotted drive and 82° countersink angle for flush mounting
- Full compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
- Versatile 3/4" length with full threading for consistent grip across various material thicknesses
Professional Applications & Engineering Value
These 4-40 UNC brass flat head screws deliver exceptional engineering value in precision assemblies where corrosion resistance and electrical conductivity are critical. The brass material prevents galvanic corrosion when mating with dissimilar metals, while the slotted drive style provides straightforward installation in confined spaces. The 82° countersink angle ensures flush mounting in predrilled holes, eliminating protrusions in streamlined applications. With Class 2A thread fit and coarse threading, these screws maintain secure fastening in vibration-prone environments common in electrical enclosures, instrument panels, and marine components. The combination of 50,000 psi tensile strength and Rockwell B50 hardness ensures they withstand mechanical stresses without stripping or deformation.
Specification Summary & Compliance
These screws maintain Class 2A thread fit tolerance per UNC standards with precise 4-40 thread size and coarse thread spacing. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restriction of hazardous substances. The fully threaded design and standard flat head profile provide consistent performance across industrial applications.
