FOR SALE IS ONE (1) NEW PACKAGE OF SIX (6) NEW M4 x 12mm long KNURLED and SLOTTED HEAD PLASTIC (nylon) THUMBSCREWS. THESE ARE THE IMPORTANT SCREWS THAT MAY HOLD YOUR COMPUTER (PC) EXTERIOR CASE TOGETHER, OFTEN FOUND IN THE REAR OF A DESKTOP PC, or VARIOUS COMPUTER COMPONENTS. M4 size, 12mm length threaded screw = 7/16" threaded screw length (not including knurled top), ROUNDED BLACK PLASTIC HEAD WITH rOund SLOTTED TOP, THESE THUMBSCREWS SHOULD BE TIGHT AND SECURE FOR SAFETY, EASY TO INSTALL AND TIGHTEN WITHOUT TOOLS, MAKE THEM TIGHTER WITH A REGULAR BLADE SCREWDRIVER. RUST AND CORROSION RESISTANT, ACID AND ALKALI RESISTANT, NON CONDUCTIVE SINCE THEY ARE PLASTIC. THESE THUMB SCREWS WITH SLOTTED HEAD ALLOW YOU TO SNUG UP THE TORQUE WITHOUT A TOOL, IF YOU PREFER, A STRAIGHT BLADE SCREWDRIVER ALLOWS FOR ADDITIONAL TIGHTENING. THESE EASY TO USE, INSTALL OR REMOVE KNURLED THUMB SCREWS ARE EASY TO GET IN PLACE DURING A TIGHT INSTALLATION. YOU WILL RECEIVE ONE PACK OF SIX (6) BLACK PLASTIC KNURLED THUMBSCREWS SHIPPED BY USPS FIRST CLASS MAIL.... note, these thumbscrews are NOT vesa screws, these thumbscrews are plastic (nylon) and are NOT suitable for mounting screens or monitors. screws for screen, moniter, vesa, GO to my store and search keyword VESA to view my (metal) VESA SCREWS, specifically designed to secure a vesa standard monitor, screen or tv to a stand BID AND BUY HERE IN IN ABSOLUTE CONFIDENCE SINCE I HAVE THOUSANDS OF POSITIVE FEEDBACK AND TEN+ YEARS EXPERIENCE. I SHIP WITHIN TWO DAYS OF RECEIPT OF PAYMENT, OFTEN THE NEXT DAY. $2.81 USPS FIRST CLASS GREEN SHIPPING USING RECYCLED PACKAGING MATERIALS AND ENVIRONMENTALLY FRIENDLY MATERIALS TO ANYWHERE USA. I DO NOT SHIP ANYWHERE ELSE. HAVE A GREAT DAY AND THANK YOU FOR STOPPING BY......