M4 x 40mm Phillips Flat Head Countersunk Bolts Machine Screws 30pcs Head Style: Flat Head; Material: 304 Stainless Steel; Package Content: 30 x Phillips Head Screw Product Name: Phillips Head Screw; Thread Size: M4 x 37mm(D*L); Weight: 101g Drive Type: Phillips; Main Color: Silver Tone Thread Pitch: 0.7mm; Total Length: 40mm/ 1.6" Head Diameter: 8mm/0.3"; Head Height: 3mm/0.12"