S-90276A543 1/4"-20 x 1 1/8" 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
- Exceptional corrosion resistance with zinc-plated steel construction for long-lasting performance in harsh industrial environments
- Superior holding power from fully threaded UNC coarse thread design that prevents loosening under vibration and load
- High tensile strength rating of 60,000 psi ensures reliable performance in demanding applications without failure
- Precise Class 2A thread fit guarantees smooth installation and consistent engagement with mating components
- Rockwell B69 hardness provides excellent durability and resistance to wear during repeated use
- Standard slotted drive offers compatibility with common tools for quick installation and maintenance
- Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH ensures safety and environmental responsibility
Professional Applications & Engineering Value
This 1/4"-20 zinc-plated steel rounded head slotted screw delivers critical engineering solutions for industrial assembly challenges. The combination of zinc-plated steel material and fully threaded UNC coarse thread design addresses common issues of corrosion and vibration-induced loosening in machinery, equipment manufacturing, and structural applications. The rounded head profile with slotted drive provides secure fastening while minimizing surface damage, making it ideal for applications requiring frequent maintenance access. With 60,000 psi tensile strength and Rockwell B69 hardness, this fastener maintains integrity under substantial mechanical stress, ensuring reliable performance in automotive, construction, and industrial machinery where right-hand thread direction and Class 2A thread fit guarantee consistent installation torque and secure fastening.
Specification Summary & Compliance
This industrial-grade screw features precise Class 2A thread fit with UNC coarse thread (1/4"-20) and right-hand thread direction meeting exact dimensional requirements. Manufactured in compliance with ASME B18.6.3 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial applications without hazardous substance restrictions.
