The first thing you do when greasing a fitting is wipe all the crud off it so you don’t pump it into the fitting — so how much time and mess could you save if the fitting was already clean? These grease fitting covers from Caplugs fit securely over grease fittings to keep them clean and dry.
Caplugs molds the low-density polyethylene covers with an integral retaining ring that keeps the cover attached to the fitting while you’re accessing it. They sell the grease fitting covers in black, white, red, yellow, green, and blue, which can be handy for indicating if a fitting requires a different type of grease or service interval.
Caplugs produces grease caps in two different styles. You’ll pay about $1 for a 10-pack of the style shown above. If you have another color in mind, call the factory — for a big enough order, they can probably oblige.