S-98164A525 5/16"-18 x 7/8" ASME B18.3, ASTM F879 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 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Precise thread engagement with Class 3A fit UNC coarse threads ensuring reliable fastening and vibration resistance
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Efficient installation with 3/16" hex drive and rounded button head design for easy tool access and reduced installation time
- Full threading coverage along the 7/8" length provides maximum grip and load distribution
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for safe, quality-assured industrial use
- Durable performance in chemical and marine exposures thanks to premium 316 stainless steel material grade
Professional Applications & Engineering Value
Engineered for industrial and marine applications, these 316 stainless steel rounded head screws address critical challenges like corrosion, high stress, and regulatory requirements. The passivated finish enhances surface durability against chlorides and chemicals, while the UNC coarse threads and Class 3A fit ensure tight, secure connections that resist loosening under vibration. With a hex drive and fully threaded design, installation is quick and reliable, reducing assembly time in equipment manufacturing, offshore platforms, and chemical processing plants. These screws deliver long-term corrosion resistance and mechanical integrity, minimizing maintenance and replacement costs in aggressive environments.
Specification Summary & Compliance
This 5/16"-18 UNC screw features precise Class 3A thread fit and coarse threading per unified standards. Manufactured to meet ASME B18.3 specifications where applicable per ASTM F879, it ensures dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components.
