S-90272A751 1/4"-28 x 1" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan 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-plated steel construction, extending service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
- Fine UNF threads with Class 2A fit provide precise engagement and reduced risk of cross-threading
- Fully threaded design maximizes grip length and holding power across the entire shank
- Rockwell B70 hardness offers excellent durability and resistance to wear during installation
- Phillips No. 3 drive allows for efficient installation with common tools while minimizing cam-out
- Rounded pan head profile provides a low-profile finish that reduces snagging and improves safety
Professional Applications & Engineering Value
This zinc-plated steel rounded head screw is engineered to address common industrial fastening challenges, including corrosion, vibration loosening, and high-stress applications. The UNF fine thread design ensures tighter tolerances and superior load distribution compared to coarse threads, making it ideal for precision assemblies in machinery, automotive components, and electronic enclosures. The fully threaded configuration provides consistent clamping force along the entire length, preventing joint failure in dynamic environments. With its Phillips drive and pan head style, it offers quick installation and a flush finish, reducing protrusion risks in confined spaces. These features make it a reliable choice for heavy-duty fastening where compliance with industry standards is critical.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit per UNF standards, ensuring precise dimensional accuracy and interchangeability. It meets ASME B18.6.3 specifications for mechanical and dimensional requirements, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in various industrial and commercial applications.
