S-90275A551 1/4"-20 x 2 1/4" ASME B18.6.3 Steel Slotted Flat Head Screws
Steel Slotted Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
- Exceptional load-bearing capacity with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precise thread engagement through Class 2A fit UNC coarse threads, enabling faster assembly and reduced cross-threading risks
- Optimal flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Enhanced installation efficiency with fully threaded right-hand design and slotted drive for straightforward manual driving
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
- Versatile coarse thread spacing providing superior holding power in various materials including metals and hard plastics
Professional Applications & Engineering Value
Engineered for industrial fastening applications, these zinc-plated steel flat head screws deliver critical performance where surface flushness and corrosion resistance are paramount. The UNC coarse thread design with Class 2A fit ensures reliable engagement in metal assemblies, machinery components, and structural frameworks, while the 82° countersink angle provides optimal seating in prepared holes. With 60,000 psi tensile strength and Rockwell B70 hardness, these fully threaded screws maintain integrity under vibration and dynamic loads common in manufacturing equipment, automotive assemblies, and construction applications. The slotted drive system offers compatibility with standard manual tools for maintenance and field service scenarios.
Specification Summary & Compliance
This 1/4"-20 flat head slotted screw features Class 2A thread fit per UNC standards with coarse thread spacing and right-hand threading. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial applications.
