About This 【Size and Quantity】-- Thread size of hanger bolts: 3/8-16", Length 4" (100mm) . 8 pcs Double Screws are in the package. 【High Quality 4.8 Carbon Steel】-- Double ended screw are made of high quality carbon steel, smooth surface without burr, black galvanized surface, corrosion resistance, high strength, durable. 【Durable and Easy to Use】-- self-attacking design, easy to install.Double Headed Bolts self-tapping screw thread neat and clear,well-made , easy to screw and won't slip loose. 【Connection Fastening Function】-- Wood dowel screw is suitable for connecting individual wooden parts，is a very ideal sofa accessories. 【Widely Used in Wood】-- Children Furniture, PET Furniture, Wooden stairs, iron furniture, outdoor furniture, household furniture, solid wood furniture, custom furniture, office furniture, environmental protection furniture etc. Overview Material : Alloy Steel, Carbon, Carbon Steel, Iron, Zinc Thread Size : 3/8"-16 Exterior Finish : Zinc Head Style : Double Head Fastener Type : Self-Tapping Screw
