S-94444A105 1/4"-20 x 1 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws
18-8 Stainless Steel Hex Head 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 Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Optimized for quick assembly thanks to UNC coarse threading and external hex drive for efficient installation
- Secure and precise fastening ensured by Class 2A thread fit, reducing the risk of loosening under vibration
- Versatile partial threading allows for effective clamping across a wide range of material thicknesses
- Long-term durability with a robust 1-1/2" length and 3/4" minimum thread engagement for sustained performance
- Compliance with major standards including ASME B18.2.1, ensuring consistent quality and interchangeability
Professional Applications & Engineering Value
These Black-Oxide 18-8 Stainless Steel Hex Head Screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. The UNC coarse thread design facilitates rapid installation in coarse-grained materials, while the external hex drive provides excellent torque transmission for secure tightening. With a partially threaded shank, they offer superior clamping force in assemblies where unthreaded grip length is critical. Ideal for machinery, structural frameworks, and outdoor equipment, these screws deliver reliable performance in heavy-duty applications where 80,000 psi tensile strength and environmental resistance are paramount. The Black-Oxide finish further enhances corrosion protection, extending service life in humid or chemically aggressive settings.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy. It meets ASME B18.2.1 specifications for hex head cap screws, ensuring consistent manufacturing quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated industrial and commercial environments without hazardous substances.
