S-90300A110 1/4"-20 x 1/2" Hex Head Screws with Flat Washer
Hex Head Screws with Flat 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 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- High tensile strength of 100,000 psi ensures secure, vibration-resistant fastening for demanding industrial applications.
- Integrated flat washer distributes load evenly, preventing surface damage and improving joint integrity.
- Coarse UNC threading with Class 2A fit allows for quick assembly and reliable performance in various materials.
- External hex drive design provides easy installation and high torque capability with standard tools.
- Full threading along the 1/2" length offers maximum grip and adjustability in assembled components.
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance.
Professional Applications & Engineering Value
This 1/4"-20 x 1/2" hex head screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The 18-8 stainless steel provides excellent resistance to rust and corrosion, making it suitable for outdoor equipment, marine hardware, and chemical processing facilities. The coarse UNC thread spacing and Class 2A thread fit ensure reliable engagement in both soft and hard substrates, reducing the risk of cross-threading. The integrated flat washer enhances load distribution, minimizing surface indentation and maintaining structural integrity under high stress. With a Rockwell B95 hardness and 100,000 psi tensile strength, this screw delivers consistent performance in heavy-duty assemblies, from machinery frames to structural supports, ensuring long-term operational safety and reducing maintenance needs.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is manufactured in accordance with industry specifications for inch system fasteners, ensuring compatibility with standard components. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer applications without hazardous substances.
