S-90058A550 1/4"-20 x 2" Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws
Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with zinc-plated steel coating, extending service life in demanding industrial environments.
- Superior torque transmission and reduced cam-out thanks to the Tri-Groove drive style, ensuring reliable installation and removal.
- Exceptional thread engagement and vibration resistance from the Class 3A thread fit and coarse UNC threading, minimizing loosening in high-stress applications.
- High tensile strength of 80,000 psi provides reliable performance under heavy loads and mechanical stress.
- Consistent hardness (Rockwell C28) ensures durability and resistance to wear over repeated use.
- Fully threaded design offers maximum grip and holding power along the entire 2" length for secure fastening.
- Rounded head profile allows for a neat, low-profile finish while distributing clamping force evenly.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these zinc-plated steel rounded head screws address critical challenges in machinery assembly, construction, and automotive sectors. The Class 3A thread fit and coarse UNC threading ensure precise, vibration-resistant connections, reducing maintenance needs in dynamic environments. With a Tri-Groove drive, users experience efficient installation with minimal tool slippage, enhancing productivity. The fully threaded design and 80,000 psi tensile strength provide robust fastening for structural components, making them ideal for applications demanding high reliability and longevity under stress.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A thread fit for tight tolerances and consistent performance. Dimensions include a 1/4"-20 thread size, 2" length, and 3/8" head diameter, manufactured from zinc-plated steel for corrosion protection. It meets general industry specifications for hardness (Rockwell C28) and tensile strength (80,000 psi), and complies with RoHS and REACH environmental standards, ensuring safety and sustainability in industrial use.
