Hyjoy Multicolor Fasteners metal screws sku-18669551961

Hyjoy self-tapping screws are listed as Multicolor Fasteners, SKU sku-18669551961, UPC 850067224716. The listed size and pattern are both #12 x 3 inch(44pcs); the title also gives a 1/2 inch length. A spiral point is described as reducing friction by 30%.

The description says the screws can penetrate up to 1/2 inch of steel or aluminum and are intended for metal-to-metal and wood-to-steel connections, including framing, roofing and solar panel setups. They have a silver ceramic coating and a 5/16" washer. The listing mentions 1,000-hour salt tests and 15-cycle Kersternich tests, as well as use with thick metal and hardwood.