Grease connectors are designed to connection hose grease gun and oiler when greasing. Depending oiler we have to choose the right type Connector . For oiler Ball are connectors chuck (sometimes jaw). If we have to machine parts oiler of flat, then we will serve the press Plug connector or pressure . For oiler horn again it's best to use connector spiky . Lubrication connectors are manufactured in Standard DIN 1283 .