S-92451A115 4-40 x 1" 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 material, ensuring long-term reliability in humid or demanding environments
- Perfect flush mounting with 82° countersink angle and flat head design for seamless surface integration and improved aesthetics
- Exceptional mechanical strength with 50,000 psi tensile strength and Rockwell B50 hardness for reliable performance under stress
- Easy installation and removal with standard slotted drive design compatible with common hand tools
- Precise thread engagement through Class 2A thread fit and UNC coarse threading for secure fastening and vibration resistance
- Full threading coverage along the 1" length provides maximum grip and load distribution across the entire fastener
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global acceptance
Professional Applications & Engineering Value
These 4-40 UNC brass flat head slotted screws deliver critical engineering solutions where corrosion resistance and flush surface requirements are paramount. The combination of brass material and fully threaded design addresses common industrial challenges including galvanic corrosion in electrical components, marine applications, and plumbing systems. The 82° countersink angle ensures perfect seating in precision-machined surfaces, eliminating protrusions that could interfere with moving parts or compromise aesthetic finishes. With coarse UNC threading and Class 2A thread fit, these screws provide reliable fastening in soft materials and resist loosening under vibration, making them ideal for electronic enclosures, instrument panels, and marine hardware where both performance and appearance matter.
Specification Summary & Compliance
Manufactured to exact inch system dimensions with Class 2A thread fit tolerance ensuring precise engagement. These flat head screws comply with ASME B18.6.3 mechanical standards for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they're free from restricted substances. The UNC coarse thread pattern and right-hand thread direction follow industry-standard specifications for compatibility with existing hardware and tooling systems.
