S-90280A544 1/4"-20 x 1 1/4" ASME B18.6.3 Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing applications
• Optimized drive engagement through Fillister head design with slotted drive, providing enhanced torque transmission
• Precise thread compatibility with UNC 1/4"-20 coarse threading and Class 2A fit, ensuring secure fastening in various materials
• Streamlined installation with fully threaded design and right-hand thread direction for efficient assembly operations
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Space-efficient profile featuring high, narrow rounded head design for applications with clearance constraints

Professional Applications & Engineering Value

This zinc-plated steel Fillister head slotted screw delivers exceptional engineering value across industrial applications where corrosion resistance and mechanical strength are paramount. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in high-stress environments, from machinery assembly to electrical enclosures. The high, narrow profile Fillister head provides superior bearing surface while maintaining a low profile for space-constrained applications. With UNC 1/4"-20 coarse threading and Class 2A thread fit, these screws offer excellent engagement in both metallic and non-metallic materials, reducing installation time while maintaining vibration resistance in dynamic operating conditions.

Specification Summary & Compliance

This 1/4"-20 slotted screw features precise Class 2A thread fit tolerances and UNC coarse threading specifications. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. The zinc-plated steel construction meets industry standards for corrosion protection while maintaining the specified mechanical properties of 60,000 psi tensile strength and Rockwell B69 hardness.