S-93405A110 4-40 x 1/2" ASME B18.13 Steel Pan Head Phillips Screws with Split Lock Washer
Steel Pan Head Phillips Screws with Split Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Reliable vibration resistance through integrated split lock washer that maintains tight fastening under dynamic loads
- High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Easy installation and removal with Phillips No. 1 drive design providing secure tool engagement
- Precise thread engagement with Class 2A thread fit ensuring consistent performance across assemblies
- Versatile coarse threading (4-40 UNC) enabling quick installation and superior holding power
- Complete regulatory compliance meeting ASME B18.13 standards and environmental regulations for global sourcing
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws with integrated split lock washers provide critical vibration-resistant fastening solutions for industrial equipment, machinery assemblies, and electronic enclosures. The 4-40 UNC coarse thread configuration ensures rapid installation while maintaining exceptional pull-out resistance, particularly valuable in high-vibration environments where traditional fasteners may loosen. The Phillips No. 1 drive offers reliable torque transmission without cam-out issues, while the pan head profile provides a low-profile finish that won't interfere with surrounding components. Engineered with fully threaded design and Class 2A thread fit, these screws deliver consistent clamping force across the entire 1/2" length, making them ideal for securing panels, brackets, and mechanical components where vibration resistance and corrosion protection are paramount.
Specification Summary & Compliance
This rounded head screw features precise Class 2A thread fit with 4-40 UNC coarse threading and right-hand orientation. Manufactured to ASME B18.13 specifications with fully threaded design measuring 1/2" in length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial applications.
