S-90400A224 1/4"-20 x 3/8" ASME B18.13 Steel Pan Head Phillips Screws with Spring Lock Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Enhanced vibration resistance through integrated spring lock washer design, preventing loosening under dynamic loads
• Maximum holding power with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Quick installation and reliable grip with fully threaded UNC coarse threads and Class 2A fit
• Optimized drive engagement featuring Phillips No. 3 drive for secure torque transmission
• Comprehensive compliance meeting ASME B18.13 standards plus RoHS 3 and REACH environmental regulations
• Versatile pan head design with standard rounded profile for broad compatibility across industrial assemblies

Professional Applications & Engineering Value

These zinc-plated steel Phillips pan head screws with integrated spring lock washer deliver exceptional engineering value in vibration-prone applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance where structural integrity is critical. The fully threaded UNC coarse threads provide superior grip in various materials, while the Class 2A thread fit maintains precise dimensional accuracy for consistent assembly. The zinc plating offers corrosion protection, making these rounded head screws ideal for industrial equipment, machinery assembly, and automotive applications where both vibration resistance and environmental compliance are mandatory requirements.

Specification Summary & Compliance

This heavy-duty fastener features 1/4"-20 UNC coarse threads with Class 2A thread fit precision, ensuring dimensional accuracy across industrial applications. Manufactured to ASME B18.13 specifications, the screw demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The spring lock washer assembly maintains consistent performance while meeting all specified mechanical properties including tensile strength and hardness requirements for reliable industrial use.