S-92451A107 4-40 x 5/16" 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, ideal for harsh industrial environments
- Exceptional mechanical strength with 50,000 psi tensile strength and Rockwell B50 hardness for reliable load-bearing performance
- Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
- Streamlined flush installation featuring standard 82° countersink angle for seamless surface finishing
- Broad compatibility with fully threaded design accommodating various material thicknesses
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
- Simplified maintenance with slotted drive design enabling easy installation and removal
Professional Applications & Engineering Value
These 4-40 UNC brass flat head screws deliver critical performance advantages in precision assembly applications. The combination of brass material and Class 2A thread fit provides excellent corrosion resistance while maintaining dimensional stability in electronic enclosures, instrumentation, and marine hardware. The 82° countersink angle and flat head profile ensure flush mounting without protrusion, preventing snagging in moving machinery. With fully threaded construction and coarse thread spacing, these screws offer superior pull-out resistance in softer materials while the slotted drive style accommodates both manual and automated installation processes. Ideal for applications requiring RoHS 3 and REACH compliance without compromising mechanical performance.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision engagement. Features UNC coarse thread pattern with 4-40 thread size and right-hand thread direction. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Standard 82° countersink angle ensures proper seating in countersunk applications.
