S-94444A104 1/4"-20 x 1 1/4" 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 from Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and reducing maintenance costs.
- High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under heavy loads and vibration.
- Rockwell B70 hardness provides excellent wear resistance and durability for repeated use.
- External hex drive and hex head design allows for easy installation and removal with standard tools, minimizing assembly time.
- Partially threaded UNC coarse thread with Class 2A fit offers quick engagement and secure holding in coarse materials.
- Compliance with ASME B18.2.1 guarantees dimensional accuracy and interchangeability for consistent performance.
- RoHS 3 and REACH compliant for safe use in regulated industries and environmentally conscious applications.
Professional Applications & Engineering Value
This Black-Oxide 18-8 Stainless Steel Hex Head Screw is engineered to address common industrial challenges such as corrosion, high stress, and assembly efficiency. The stainless steel material with a protective black-oxide finish resists rust and chemical exposure, making it ideal for outdoor equipment, marine hardware, and chemical processing plants. Its UNC coarse thread and partial threading ensure rapid installation and strong grip in wood, metal, and plastic, reducing the risk of cross-threading. With an external hex drive, it provides superior torque transmission for secure fastening in heavy-duty applications like machinery, construction, and automotive assemblies, enhancing reliability and minimizing downtime.
Specification Summary & Compliance
This screw features precise Class 2A thread fit for consistent engagement and meets ASME B18.2.1 standards for dimensional accuracy. It is manufactured from 18-8 stainless steel with a black-oxide surface treatment, ensuring compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. Key specifications include a 1/4"-20 UNC coarse thread, 1-1/4" length, and 80,000 psi tensile strength, providing reliable performance in industrial settings.
