S-97595A561 4-40 x 3/16" 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 material, ideal for harsh industrial environments and electrical applications.
- Exceptional thread reliability with Class 3A fit, ensuring precise, secure fastening and reduced risk of cross-threading.
- High tensile strength of 50,000 psi provides durable, long-lasting performance under mechanical stress.
- Efficient installation with 1/16" hex drive and standard 82° countersink angle for a flush, professional finish.
- Wide compatibility due to UNC coarse thread spacing and right-hand threading, suitable for various assemblies.
- Full threading along the 3/16" length offers maximum grip and holding power in thin materials.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees safety, quality, and environmental standards.
Professional Applications & Engineering Value
This 4-40 UNC brass flat head screw is engineered to address common industrial challenges, such as corrosion in moist or chemical-exposed settings. The brass material naturally resists rust and oxidation, making it perfect for electrical enclosures, marine equipment, and precision instruments. Its Class 3A thread fit and coarse UNC threading ensure quick, secure assembly with minimal effort, reducing installation time and improving productivity. The flat head design with an 82° countersink angle sits flush with surfaces, preventing snagging and enhancing aesthetics in finished products. With a Rockwell B55 hardness and 50,000 psi tensile strength, it withstands vibration and load stresses, offering reliable performance in automotive, aerospace, and machinery applications.
Specification Summary & Compliance
This screw adheres to ASME B18.3 standards, ensuring dimensional accuracy and Class 3A thread fit for consistent performance. It features a right-hand UNC thread with coarse spacing, a length of 3/16", and full threading. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms it is free from hazardous substances, meeting global environmental and safety regulations for industrial use.
