Stronger than Grade 8.8 and ASTM A325 hex head screws, these steel screws meet ASTM A490 regulations for structural applications, such as mating I-beams and scaffolding. Used in joints that require more tensile strength than ASTM A325 screws. Material meets ASTM F3125 specifications for quality. Screws are partially threaded and come with precise threaded and unthreaded portions, allowing you to place only the stronger unthreaded portion (grip) in joints subjected to sideways forces. Length is measured from under the head.
Standard ASTM F3125 / F3125M
Material Alloy Steel Grade A490 Finish Black Oxide (BLO) Drive Hex Diameter 33mm Thread Pitch 3.50mm (Coarse) Thread Direction Right Hand Actual measurements may vary slightly +/- depending on production run within IFI Tolerances.
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