80 Pcs M4 x 20 Petal Nuts Expansion Nut, Jack Nuts With Screws, Short Jacknut Expansion Nut Flat Head Threaded Insert Nut Easy Installation for Hollow Wall Iron Plastic Thin Metal Thin Soft Wall

Description

Features: Product use: mainly used in construction projects, railway projects, underground garages, steel buildings, bridge buildings and other places Specifications: Model: M4 x 20 Installation method: 1. Drill a hole to the recommended diameter 2. tap the anchor bolt into the hole until it is flush with the surface of the substrate. 3. fit the setting tool to the head of the screw and squeeze to enlarge the anchor bolt. (smaller sized anchor bolts can be set with a screwdriver) 4. Remove the screw and thread it through the screw 5. Remove the screw and place it through the retainer and back into the anchor bolt. Tighten the screw until the fixing is secure Packing list: M4 x 20 Petal Nuts Expansion Nut * 80 P Notes. 1. Measured by hand, please allow for slight errors in size. 2. Due to different screen displays, there may be slight differences in colour.