S-90276A595 5/16"-18 x 3" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round Head 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 resistance with zinc-plated steel construction, extending service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable load-bearing capacity for heavy-duty applications
- Rockwell B69 hardness provides excellent wear resistance and durability under mechanical stress
- Class 2A thread fit offers consistent assembly performance and easier installation with standard UNC coarse threads
- Partially threaded design allows precise clamping control where full thread engagement isn't required
- Slotted drive compatibility enables quick installation with common tools while maintaining rounded head aesthetics
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory acceptance for industrial use
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws deliver exceptional engineering value for industrial fastening applications requiring both strength and corrosion protection. The 5/16"-18 UNC coarse thread configuration provides superior holding power in softer materials and faster installation compared to fine threads. The partially threaded design is particularly valuable in applications requiring precise gap control or where thread engagement needs to be limited to specific sections. The slotted drive system offers universal tool compatibility while the rounded head profile distributes clamping force evenly, preventing surface damage. With 60,000 psi tensile strength and Rockwell B69 hardness, these screws withstand vibration and dynamic loads in machinery, equipment assembly, and structural applications where reliability is critical.
Specification Summary & Compliance
This 3" length screw features Class 2A thread fit tolerance for consistent performance and UNC coarse threading (5/16"-18) with minimum thread length of 1-1/2". Manufactured to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and workplace safety compliance.
