S-94444A100 1/4"-20 x 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads, minimizing the risk of fastener failure.
• Rockwell B70 hardness provides excellent durability and wear resistance, extending the service life of your assemblies.
• External hex drive and hex head design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Class 2A thread fit with UNC coarse threading offers consistent, reliable engagement and faster installation in a variety of materials.
• Full threading along the 1/2" length ensures maximum grip and holding power across the entire fastener.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees product quality, safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This 1/4"-20 UNC hex head screw is engineered to address common industrial challenges such as vibration loosening, corrosion-induced failure, and assembly time inefficiencies. The Black-Oxide 18-8 Stainless Steel material provides a protective layer that significantly enhances corrosion resistance, making it suitable for outdoor equipment, marine applications, and chemical processing plants. The coarse thread spacing and external hex drive facilitate quick and secure fastening in soft metals or plastics, reducing labor costs. With its fully threaded design and high tensile strength, it delivers uniform clamping force and reliability in heavy-duty fastening scenarios, from machinery frames to structural supports, ensuring long-term operational integrity.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and ease of assembly. It is manufactured in compliance with ASME B18.2.1 specifications, ensuring consistent quality and interchangeability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for use in various industrial and international markets.