S-97763A358 5/16"-18 x 5/8" 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
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- Superior holding power and reliability from a fully threaded design and 70,000 psi tensile strength
- Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threading for reduced cross-threading
- Easy installation and removal with a hex drive (3/16") and rounded button head for efficient tool engagement
- High durability and wear resistance backed by Rockwell B55 hardness for long-term performance
- Broad industrial compatibility with compliance to ASME B18.3 standards, RoHS 3, and REACH regulations
- Versatile application fit due to 5/8" length and right-hand thread direction for standard assembly needs
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 5/16"-18 UNC Rounded Head Screws address common challenges like corrosion, vibration loosening, and assembly efficiency. The Black-Oxide 18-8 Stainless Steel construction provides excellent resistance to rust and chemicals, extending service life in machinery, automotive, and outdoor equipment. The Class 3A thread fit and coarse UNC threading ensure tight, reliable connections that withstand high stress, while the hex drive and rounded head design facilitate quick installation with standard tools, reducing labor time. Fully threaded for maximum grip, these screws are ideal for heavy-duty fastening in structural and mechanical assemblies where durability and regulatory compliance are critical.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, with a diameter of 0.313" and coarse thread spacing. Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally safe and sustainable industrial use.
