S-90279A550 1/4"-20 x 2" ASME B18.6.3 Steel Round Head Phillips Screws
Steel Round Head Phillips 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 zinc plating for extended service life in demanding industrial environments
- Exceptional tensile strength rated at 60,000 PSI ensures reliable performance under heavy loads and vibration
- Optimized thread engagement with UNC coarse spacing and Class 2A fit provides secure fastening and reduced installation time
- Enhanced drive stability with No. 3 Phillips head design prevents cam-out and enables efficient torque application
- Full threading along 2" length offers maximum grip range and flexibility in material thickness applications
- Certified industrial compliance with ASME B18.6.3 standards ensures consistent quality and dimensional accuracy
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver critical performance advantages for industrial assembly applications where vibration resistance and long-term reliability are paramount. The combination of Rockwell B69 hardness and 60,000 PSI tensile strength provides exceptional durability against mechanical stress, while the fully threaded UNC coarse spacing ensures maximum holding power in various materials. The rounded head profile with Phillips drive offers streamlined installation without snagging, making these 1/4-20 screws ideal for machinery, equipment manufacturing, and structural applications requiring consistent, repeatable fastening performance. Their compliance with major industrial standards guarantees dimensional precision and interchangeability across production runs.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications (1/4"-20). Complies with ASME B18.6.3 mechanical and dimensional standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features right-hand threading, standard rounded head profile, and full threading along the 2" length for consistent performance across industrial applications.
