S-90273A155 6-32 x 1 1/4" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding industrial environments
• Excellent holding power with full threading providing maximum grip along the entire 1-1/4" length
• High tensile strength rating of 60,000 psi ensures reliable performance under heavy loads
• Precision thread fit with Class 2A tolerance for smooth installation and secure fastening
• Optimized drive engagement with No. 2 Phillips head for efficient installation and reduced cam-out
• Flush mounting capability with standard 82° countersink angle for clean, professional finishes
• Enhanced durability with Rockwell B70 hardness maintaining thread integrity through repeated use

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with 6-32 UNC coarse thread configuration are engineered to address critical fastening challenges in industrial assembly operations. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in vibration-prone applications where fastener integrity is paramount. The fully threaded design maximizes surface contact for superior pull-out resistance, while the standard 82° countersink angle provides seamless integration in precision-machined components. Ideal for metal fabrication, electrical enclosures, and machinery assembly, these Phillips drive screws deliver consistent performance in automated and manual installation processes, reducing assembly time and maintenance requirements.

Specification Summary & Compliance

This 1-1/4" flat head screw features precise Class 2A thread fit with UNC coarse thread spacing (6-32 size) and right-hand thread direction. Manufactured to exacting ASME B18.6.3 specifications, the fastener ensures dimensional accuracy and interoperability. The product maintains full compliance with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions, making it suitable for global industrial applications with stringent environmental and safety requirements.