... , Brass, Aluminum, Stainless Steel, Steel alloy, etc.2.Screw with a looped head. Larger ones are sometimes called lag ... used as attachment point, particularly for something that is hung from it.3. Specification: OEM, according to customers' drawing ... : turning, milling, drilling etc.6. Equipment: CNC lathe, automatic lathe, hand lathe, thread rolling machine, tapping drilling machine etc.7. Surface ...