S-92949A550 1/4"-20 x 2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance
- Precise, secure fastening ensured by Class 3A thread fit and UNC coarse spacing, reducing the risk of cross-threading
- Efficient installation and removal with hex drive design, providing high torque transmission and tool compatibility
- Full thread engagement along the 2" length for maximum grip and load distribution in demanding applications
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met
- Durable rounded head design that minimizes stress concentration and provides a clean, finished appearance
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress fatigue. The passivated finish enhances surface durability, preventing rust and chemical degradation in aggressive settings like marine, chemical processing, and outdoor machinery. Its UNC coarse threads and Class 3A fit ensure rapid assembly with minimal risk of stripping, while the hex drive allows for high-torque applications without slippage. Ideal for heavy-duty equipment, structural assemblies, and precision machinery, this screw delivers consistent performance where reliability and compliance with ASME B18.3 standards are critical.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit for accurate and secure fastening. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
