ITEM NAME:M4 x 8mm Alloy Steel Hex Bolt Socket Head Cap Screws Black 100 Pcs L9F5 M4 x 8mm Alloy Steel Hex Bolt Socket Head Cap Screws Black 100 Pcs L9F5 Drive Type: Hex Socket; Head Style: Button Head; Product Name: Socket Button Head Screws; Weight: 104g Socket Button Head . Fastener Type: Machine Screw . colour: black Material: alloy steel size: Thread Size: 4(M4) x 8mm/ 0.16 inch x 0.31 inch(D*L) Thread Pitch: 0.7mm; Total Length: 10mm/ 0.4 inch Head Diameter: 7mm/ 0.28 inch; Hex Key Size: 2mm/ 0.08 inch Package Contents: 100 x Hexagonal Round Head Screws Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Drive Type: Hex Socket; Head Style: Button Head;. Fastener Type: Machine Screw. Thread Pitch: 0.7mm;. Socket Button Head. 100 x Hexagonal Round Head Screws.