S-97715A420 3-56 x 1/4" 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 with brass construction, ideal for harsh environments and electrical applications.
- Precise, reliable fastening ensured by the Class 3A thread fit, minimizing the risk of loosening under vibration.
- High tensile strength of 50,000 psi provides dependable holding power for demanding industrial assemblies.
- Easy installation and removal with the 1/16" hex drive, allowing for efficient assembly line operations.
- Compact, low-profile button head design offers a smooth finish and reduces snagging in tight spaces.
- Fine UNF threading delivers enhanced grip and superior load distribution compared to coarse threads.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market accessibility.
Professional Applications & Engineering Value
This 3-56 UNF fine thread brass screw is engineered to address critical needs in precision industries like electronics, instrumentation, and aerospace. The brass material provides excellent electrical conductivity and resistance to galvanic corrosion, making it perfect for grounding applications and marine environments. The rounded button head and fully threaded 1/4" length allow for a flush fit and maximum thread engagement, preventing component damage and ensuring a secure, vibration-resistant connection. Its 50,000 psi tensile strength and Rockwell B55 hardness guarantee durability without brittleness, solving the common problem of fastener failure in high-stress, fine-adjustment assemblies. The hex drive facilitates quick and secure tool engagement, streamlining production and maintenance processes.
Specification Summary & Compliance
This screw features a 3-56 UNF fine thread with a precision Class 3A fit for tight tolerances and superior thread engagement. The dimensional specifications include a head diameter of 0.188", a head height of 0.052", and a total length of 1/4". It is manufactured from brass and is fully threaded. The product is confirmed to be RoHS 3 (2015/863/EU) compliant under exemption 6(c) and is REACH (EC 1907/2006) compliant as of the latest substance list.
