S-91440A634 2-56 x 3/8" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws
Steel Round Head Combination Phillips/Slotted 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 protection with zinc-plated steel construction, extending service life in demanding industrial environments
- Enhanced installation flexibility through dual Phillips/Slotted drive system compatible with No. 1 drive tools
- Reliable thread engagement with Class 2A coarse UNC threads ensuring consistent fastening performance
- Optimized head design featuring rounded profile for reduced surface marking and improved aesthetic integration
- Full-length threading providing maximum grip strength across the entire 3/8" fastener length
- Right-hand thread orientation enabling standard installation procedures for operational efficiency
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver critical corrosion resistance for industrial assemblies exposed to moisture or chemical environments. The 2-56 UNC coarse thread configuration with Class 2A fit provides reliable fastening in metal, plastic, and composite materials while resisting vibration-induced loosening. The combination of Phillips/Slotted drive accommodates various tooling systems, reducing installation time in high-volume production. The fully threaded design ensures maximum load distribution across the entire 3/8" length, making these industrial fasteners ideal for electronics enclosures, machinery panels, and automotive components where consistent clamping force is essential.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit tolerance for consistent dimensional accuracy. Features UNC coarse threads (2-56 size) with right-hand orientation and fully threaded 3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. The zinc-plated steel construction provides corrosion resistance while maintaining mechanical strength for industrial fastening applications.
