Standard couplers and dispensing tips fit grease fittings (zerk fittings) with common nipple profiles. Also called hydraulic couplers, they dispense grease or act as a base to mount other types of couplers.

Locking couplers, also called dispensing tips, feature a lever-activated sleeve that slides over and secures the coupler's jaws onto standard grease fittings. They provide a secure, leak-tight seal that can only be released with the lever, preventing the coupler from coming loose while dispensing grease and freeing both hands to work with the grease gun.

Quick-connect couplers, also called dispensing tips, grab onto standard grease fittings (zerk fittings) to provide a secure, leak-tight seal. They withstand pressure and prevent the coupling from coming loose while dispensing grease.

Button-head couplers slide over the flat, circular top of a button head at a 90° angle to dispense grease. This angle allows grease guns to feed button-head grease fittings in spaces with minimal clearance.

Flush-style couplers have pointed tips, or nipples, to reach into the concave profile of a flush-style grease fitting (zerk fitting) which is mounted flush with the surface of equipment.

Coupler kits expand the grease gun's ability to lubricate multiple different types of grease fittings on equipment without the need to purchase items separately. Kits include a variety of dispensing tips and supporting components for a grease gun.