we would like to offer You the highest quality bolts and nuts made of titanium alloy Ti-6Al-4V (VT-16, Russian analog of Grade 5): 1. Nut M4 2. Nut M63. Nut M6 x 1 (self-locking)4. Bolt M4 x 10 mm5. Bolt M4 x 13 mm6. Bolt M6 x 28 mm7. Bolt M6 x 30 mm8. Bolt M6 x 20 mmFasteners are certified according to Russian OST standards. Method of making threads is rolling, method of making heads is cold forging.Products required for industrial, aerospace, automotive, defense, electronics & medical devices. Products have the highest quality and great mechanical behavior