5/16-18x1-1/2" Flat Head Socket Cap Screws, 10.9 Grade Carbon Steel, 20PCS 19mm X 9mm Bracket Depth: 24mm/0

Bracket Depth: 24mm/0

Frame Outer diameter : 169mm / 6

The stem sealing ring has strong air tightness

They are available with a variety of head shapes

so you can even punch holes in them and stick or glue them onto a knitted hat or a sweater

5/16-18x1-1/2" Flat Head Socket Cap Screws, 10.9 Grade Carbon Steel, 20PCS 19mm X 9mm Bracket Depth: 24mm/0Description: [Material] Made of 10. 9 grade carbon steel, it has high strength, rust resistance, oxidation resistance, and corrosion resistance, which can ensure long term use. [Advantage] Hexagonal socket head type, uniform force is not easy to slip, easy to use. Suitable for replacing old bolts at any time. [Application] Widely used in woodworking and DIY jobs, the repair industry and power industry, aerospace industry, office equipment industry,