M4/ 4mm Machine Screws, Slotted Countersunk, A2/ 304 Stainless Steel, DIN 963 Fixaball sells all lengths of M4, A2/ 304 Stainless Steel, Slotted, Countersunk Machine Screws. What is a Machine Screw? A machine screw is a fastening device similar to a bolt but having a pozidrive or slotted head which allows it to be turned with a screwdriver. It is usually applied to fastening metal components together that are pre threaded and not expected to withstand a heavy load/ force.   How do you measure a countersunk fixing or fastener? Fixing and fastener length refers to the length of the material which contacts the joining materials/ parts. So, as a countersunk head sits below the surface of the joining materials/ parts, the length is from end to end.   Orders placed before 2pm are dispatched same day (Mon-Fri). Standard, Free Delivery is Royal Mail, 2nd Class (2-5 days, most likely 2 days). For a faster delivery time, select 1st class or courier at checkout.  Please make your 'Length' and, 'No. of Items in Pack' and 'Quantity' of packs selection from the drop down menus.   M4/ 4mm, Machine Screws, Slotted, Countersunk, A2/ 304 Stainless Steel, DIN 963 Lengths Available M4 X 8 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 10 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 12 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 16 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 20 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 25 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 30 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 35 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 40 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 45 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 55 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 60 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL M4 X 70 SLOT COUNTERSUNK MACHINE SCREW DIN 963 A2 STAINLESS STEEL   Manufactured from A2/ 304 Stainless Steel, DIN 963 Image is for illustrative purposes only.