S-97715A428 4-40 x 7/16" Brass Button Head Hex-Drive Screws
Brass Button Head Hex-Drive 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 thanks to brass construction, ensuring long-term reliability in harsh environments
- Exceptional tensile strength of 50,000 psi provides reliable fastening under high-stress industrial conditions
- Precision Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening
- Rockwell B55 hardness delivers excellent durability and resistance to wear during repeated installations
- Hex drive compatibility (1/16") enables quick, secure installation with standard tools, reducing assembly time
- Fully threaded design ensures maximum grip and holding power across the entire 7/16" length
- RoHS 3 and REACH compliance meets international environmental standards for safe use in regulated industries
Professional Applications & Engineering Value
These 4-40 UNC brass rounded head screws are engineered to solve critical fastening challenges in precision assemblies. The coarse thread spacing and Class 3A thread fit provide superior resistance to vibration loosening, making them ideal for electronic enclosures, instrumentation, and machinery where reliability is paramount. The rounded button head style offers a low-profile finish that prevents snagging while the brass material ensures excellent conductivity and corrosion resistance in electrical applications. With fully threaded construction and 50,000 psi tensile strength, these screws maintain integrity in high-stress environments while the hex drive enables efficient installation in confined spaces.
Specification Summary & Compliance
These screws feature precision 4-40 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. The right-hand thread direction and standard rounded head profile ensure compatibility with industry standards. Manufacturing complies with RoHS 3 (2015/863/EU) with exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) compliance, meeting international environmental regulations for industrial components.
