uxcell 7mm Head Diameter M4x18mm Socket Cap Screws Hex Drive Keys 20pcs Product Name : Hex Socket Cap Screw;Material : 304 Stainless Steel;Color : Silver Tone Screw Type : M4x 18mm;Thread Diameter : 4mm/ 0.16";Thread Length : 18mm/ 0.7" Thread Pitch : 0.7mm;Hex Width : 3mm/ 0.12" Head Size : 7 x 4mm/0.28" x 0.16" (D*H);Overall Size : 22 x 7mm/ 0.87" x 0.28"(L*D) Weight : 45g;Package Content : 20 x Hex Socket Cap Screws