- Made of high quality carbon steel, hard and solid, anti-rust and anti-corrosion, durable and long service life. 2. These small size slotted nuts are easy to use and convenient for you, they are used with connection bolts, these nuts can be used to assemble furniture in the form of beds, cribs and kits, also suitable to wood, planks, kitchen counters, etc. Delivery quantity: 40 pieces, good enough to use Size: M6 * 10 outer diameter * 13mm height Colour: Galvanized