S-97595A562 4-40 x 1/4" ASME B18.3 Brass Hex Drive Flat Head Screws
Brass Hex Drive 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 with brass construction for extended service life in harsh environments
- Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
- High tensile strength of 50,000 psi provides exceptional load-bearing capacity for demanding applications
- Rockwell B55 hardness offers excellent durability and wear resistance during installation and use
- 82° countersink angle enables flush mounting for clean, professional finishes
- Hex drive design allows for secure tool engagement and efficient installation in confined spaces
- Full threading delivers maximum grip length and uniform stress distribution
Professional Applications & Engineering Value
These 4-40 UNC flat head screws with Class 3A thread fit are engineered to solve critical fastening challenges in precision industries. The brass material provides inherent corrosion resistance, making them ideal for electrical components, marine equipment, and plumbing systems where moisture exposure is common. The coarse thread spacing ensures quick assembly while maintaining holding power, and the hex drive prevents cam-out during high-torque applications. With their 82° countersink profile, these screws create seamless surfaces in manufactured products, eliminating protrusions that could interfere with mechanical operation. The combination of 50,000 psi tensile strength and Rockwell B55 hardness makes these fasteners suitable for vibration-prone environments where loosening could compromise system integrity.
Specification Summary & Compliance
These precision inch fasteners feature UNC thread form with Class 3A thread fit tolerance for superior dimensional accuracy. Manufacturing complies with ASME B18.3 specifications, ensuring consistent quality and interchangeability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming the absence of restricted hazardous substances. The right-hand thread direction with coarse thread spacing follows industry-standard threading protocols for reliable performance across applications.
