M4 x 8mm 12mm 16mm 20mm 25mm Flat Head Hex Socket Cap Screws Countersunk Bolts, 10.9 Grade Alloy Steel, Black Oxide Finish, Metric Allen Hex Drive, Fully Threaded, Assortment Kit 100Pcs

Made of 10.9 Grade Alloy Steel, with a black surface oxidation treatment, these bolts are strong, durable, and have excellent wear resistance, high hardness, and high strength.Clear Uniform pitch, obvious screw thread, no residual burrs, the screw threads will be able to get a good grip.Screw Specification: Thread Diameter 4 mm Head Diameter 7.8 mm Head Height 3.4 mm Screw Length 8 mm, 12 mm, 16 mm, 20 mm, 25 mm Allen Hex Drive 2.5 mm Package contains: (20PCS) M4 x 8 mm (20PCS) M4 x 12 mm (20PCS) M4 x 16 mm (20PCS) M4 x 20 mm (20PCS) M4 x 25 mm Total: 100PCSAny time you need us, please contact us via email or Q&A. We will provide you with professional service and reply to you as soon as possible, you can rest assured to buy.

• Material: 100% 10.9 Grade alloy steel, and the surface is treated with black oxide. They have excellent corrosion resistance, firmness, wear resistance and low temperature resistance.
• Thread Diameter: 4 mm; Pitch Size: 0.7 mm, Thread Length: 8 mm, 12 mm, 16 mm, 20 mm, 25 mm.
• Head Diameter: 7.8 mm; Head Height: 3.4 mm; Drive Type: Allen Hex Socket 2.5 mm; Color: Black Oxide.
• Package Included: M4 x 8 mm(20PCS), M4 x 12 mm(20PCS), M4 x 16 mm(20PCS), M4 x 20 mm(20PCS), M4 x 25 mm(20PCS).
• Any time you need us, please contact us via email or Q&A. We will provide you with professional service and reply to you as soon as possible, you can rest assured to buy.