18mm Long M4x16mm Stainless Steel Hex Socket Button Head Screws 50 Pcs Product Name : Button Head Screws;Material : 304 Stainless Steel;Color : Silver Tone Head Type : Button Head;Screw Type : M4x 16mm;Thread Diameter (d) : 4mm/ 0.16" Thread Length (L) : 16mm/ 5/8";Thread Pitch : 0.7mm;Hex Key Width (S) : 2.5mm/ 0.1" Head Size (dk xk) : 7 x 2mm/ 0.28" x 0.08" (D*H);Overall Size : 18 x 7mm/ 0.7" x 0.28"(L*D) Weight : 84g;Package Content : 50 (+/-2%) x Button Head Screws