DIMENSIONS: Diameter: #8, Length: 5/8” | Metric Dimensions: M4 X 16mm | Strong and durable: These screws is made with Stainless steel 18/8 (A2) and provides excellent rust resistance. ensuring quality and longevity. | Size: #8, Thread Diameter(T): 0.16 inch / Metric Thread Diameter: M4 | These sheet metal screws, or tapping screws, are highly versatile and are used to attach metal, wood, fiberglass, and plastic. The sharp threads draw material together and ensure a secure hold. | After-sales Service - Quality problems occur within one year replacement, lifetime warranty, if you're not completely satisfied, then CONTACT US and we will give you a 100% refund within 90 days of purchase.