S-90276A274 1/4"-20 x 6" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round Head Slotted 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 performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
- UNC coarse threading with Class 2A fit offers quick assembly and secure fastening in various materials
- Partially threaded design allows for precise clamping force control and reduced material stress
- Slotted drive compatibility enables easy installation with standard tools while maintaining head integrity
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory adherence for global industrial applications
Professional Applications & Engineering Value
This zinc-plated steel rounded head screw addresses critical industrial fastening challenges where corrosion resistance and structural integrity are paramount. The 1/4"-20 UNC coarse threading combined with Class 2A thread fit provides optimal engagement in metal, wood, and composite materials, reducing cross-threading risks in high-volume assembly operations. The partially threaded shank concentrates clamping force precisely where needed, preventing joint loosening in vibrating machinery and equipment. With 60,000 psi tensile strength and Rockwell B69 hardness, these industrial screws maintain performance in heavy-duty applications including machinery frames, structural supports, and manufacturing equipment where consistent fastener reliability is essential for operational safety and reduced maintenance intervals.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent dimensional accuracy. The 1/4"-20 UNC coarse thread pattern ensures compatibility with standard industrial components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming safe use across global markets. The zinc-plated steel construction meets industrial corrosion protection standards while maintaining the specified 60,000 psi tensile strength and Rockwell B69 hardness parameters.
