S-97715A429 4-40 x 1/2" 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 from brass material, ideal for humid or chemically exposed environments
- High tensile strength of 50,000 PSI ensures reliable load-bearing capacity in demanding applications
- Precision Class 3A thread fit guarantees tight, secure fastening with minimal risk of loosening
- Rockwell B55 hardness provides excellent durability and resistance to wear over time
- Fully threaded UNC coarse design allows for faster installation and strong grip in various materials
- 1/16" hex drive with rounded button head offers easy installation and a low-profile, smooth finish
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and industry acceptance
Professional Applications & Engineering Value
Engineered for precision and longevity, these 4-40 UNC brass rounded head screws address common industrial challenges such as corrosion, vibration, and assembly efficiency. The brass material naturally resists rust and galvanic corrosion, making these screws ideal for electrical enclosures, marine equipment, and plumbing systems where moisture is a concern. With a Class 3A thread fit and coarse thread spacing, they provide quick, secure fastening in soft metals or plastics, reducing installation time and improving production throughput. The fully threaded design ensures maximum holding power, while the rounded button head and 1/16" hex drive facilitate easy torque application in confined spaces, enhancing worker safety and operational reliability in automated or manual assembly lines.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A precision fit, ensuring consistent dimensional accuracy and interchangeability. Key specifications include a 1/2" length, right-hand thread direction, and coarse thread spacing for robust performance. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloys and is REACH (EC 1907/2006) compliant, confirming its suitability for global industrial and consumer applications without hazardous substances.
