S-90272A113 4-40 x 3/4" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips 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
- Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
- High tensile strength of 60,000 psi provides exceptional load-bearing capacity for demanding applications
- Rockwell B70 hardness delivers excellent wear resistance and durability under repeated use
- Class 2A thread fit ensures smooth assembly and reliable fastening with standard mating components
- Fully threaded design offers maximum grip length and uniform stress distribution across the entire fastener
- Phillips No. 1 drive enables efficient installation with common tools while reducing cam-out risks
- Coarse UNC threading provides quick assembly and superior resistance to vibration loosening
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages in industrial fastening applications where corrosion resistance and mechanical strength are paramount. The zinc-plated steel construction provides essential protection against oxidation and environmental degradation, while the pan head profile with Phillips drive ensures secure installation without specialized tools. Engineered with coarse threading and Class 2A thread fit, these fasteners maintain reliable connections in vibration-prone equipment, electronic enclosures, and machinery assemblies. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes them ideal for applications requiring repeated disassembly and reassembly without performance degradation.
Specification Summary & Compliance
These rounded head screws feature precision 4-40 UNC coarse threads with Class 2A thread fit tolerances for consistent mating with standard components. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance reliability. The products are fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, ensuring safe use across various industrial sectors while meeting international environmental standards.
