S-90273A419 5-40 x 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments
• High tensile strength of 60,000 psi provides reliable fastening integrity under substantial mechanical loads
• Rockwell B70 hardness delivers excellent wear resistance and maintains thread integrity during repeated installations
• Class 2A thread fit with UNC coarse threading enables quick assembly and reduces cross-threading risks in production lines
• 82° countersink angle with standard flat head profile ensures flush mounting for streamlined surfaces and improved aesthetics
• Fully threaded design offers maximum grip length and uniform stress distribution across connected components
• Phillips No. 2 drive system facilitates efficient installation with common tools while minimizing cam-out incidents

Professional Applications & Engineering Value

These 5-40 UNC flat head screws deliver critical engineering solutions where surface flushness and structural reliability are paramount. The zinc-plated steel construction provides essential corrosion protection for electrical enclosures, machinery panels, and automotive assemblies exposed to moderate environmental factors. With coarse UNC threading and Class 2A tolerance, these fasteners prevent stripping in soft materials while enabling rapid installation in high-volume manufacturing. The 82° countersink angle ensures seamless integration into precision-machined components, eliminating protrusions that could interfere with moving parts or compromise safety. These Phillips drive screws are engineered to maintain clamping force in vibration-prone applications, from conveyor systems to industrial equipment maintenance.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. The 5-40 UNC coarse thread configuration ensures reliable engagement in various materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage across industrial sectors. Standardized 1/2" length and 0.125" thread diameter provide interchangeability with existing fastener systems.