S-90300A150 5/16"-18 x 3/4" Hex Head Screws with Flat Washer
Hex Head Screws with Flat Washer
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced load distribution from the integrated flat washer, reducing surface pressure and preventing loosening
- High tensile strength of 100,000 psi ensures reliable performance under heavy-duty mechanical stress
- Excellent thread engagement with Class 2A fit and coarse UNC threading for quick assembly and secure fastening
- Durable Rockwell B95 hardness provides resistance to wear and deformation during installation and use
- Full threading along the 3/4" length offers maximum grip and holding power in various material thicknesses
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance in global markets
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw with integrated flat washer is engineered to address common industrial fastening challenges. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for outdoor equipment, marine applications, and chemical processing facilities. The coarse UNC threading and Class 2A thread fit enable rapid installation and reliable performance in materials where fine threads might strip or fail. The external hex drive allows for high-torque application with standard tools, while the fully threaded design ensures consistent clamping force across the entire length. This combination of features delivers superior vibration resistance and long-term reliability in demanding environments such as machinery assembly, structural frameworks, and heavy equipment maintenance.
Specification Summary & Compliance
This hex head screw maintains precise Class 2A thread fit according to UNC standards, with dimensions including 5/16"-18 thread size, 3/4" length, and 1/2" head width. The integrated flat washer measures 0.89" OD with 0.064" thickness, manufactured from matching stainless steel. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material transparency for industrial procurement.
