This European Standard specifies the required characteristics and the tests for lubricating nipples of the axial type, in corrosion resisting steel, passivated. Annex A (normative) states the clearance space requirements for the coupling and uncoupling of the lubricating gun and the maximum permissible diameter of the lubricating gun barrel, together with installation thread requirements. Lubricating nipples according to this European Standard are intended for use in aerospace assemblies, where regular lubrication of moving parts is required.