S-90910A533 1/4"-20 x 1 1/2" ASME B18.3, ASTM F835 Steel Button Head Torx Plus Screws
Steel Button Head Torx Plus 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 torque transfer and strip-out resistance with Torx Plus IP27 drive for reliable fastening in high-stress applications
- Enhanced corrosion protection through zinc-plated alloy steel construction, extending service life in harsh industrial environments
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty load-bearing applications
- Precision thread engagement with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections
- Optimized head design featuring a rounded button profile for reduced snagging and improved aesthetic integration
- Full compliance with industry standards including ASME B18.3 for dimensional accuracy and reliable performance
- Environmental regulation compliance meeting RoHS 3 and REACH requirements for safe, sustainable manufacturing
Professional Applications & Engineering Value
These zinc-plated alloy steel rounded head screws deliver exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The Torx Plus IP27 drive system eliminates cam-out issues common in Phillips drives, enabling higher torque application in assembly lines and maintenance operations. The Class 3A UNC coarse threads provide rapid installation in machinery, equipment frames, and structural components while maintaining secure fastening under dynamic loads. The combination of 120,000 psi tensile strength and Rockwell C39 hardness ensures these industrial fasteners withstand extreme mechanical stress in manufacturing, automotive, and heavy equipment applications without compromising integrity.
Specification Summary & Compliance
This 1/4-20 x 1-1/2" rounded head screw features precision UNC coarse threading with Class 3A fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications (ASTM F835) with complete RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. The fastener maintains right-hand thread direction with fully threaded design for maximum engagement strength across its entire length.
