1/4 x 1 1/4 Slotted Hex Hi-Low Thread Concrete Screws Blue Ceramic Coated (3000)

as the anchor remains in place and allows you to use it repeatedly

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Industrial quality

Typical hardness on diameters 1/4 to 1 inch is HRC 25-34

M20-2.50 x 30 Socket Set Screw Cup Point DIN 916 Black Oxide Alloy Flat Washers Silicon Bronze 1/4 x 1 1/4 SlottedM20 2. 50 x 30 Socket Set Screw Cup Point DIN 916 Black Oxide Alloy . A headless screw threaded the entire length. It has a hexagonal drive at one end and a cup shaped indentation at the other end. The cup point is the most used style set screw. Designed for fast, permanent and semi permanent location of parts on shafts with hardness differential of 10 15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable. Hardness: Rockwell