PERFORMANCE TOOLW54248 6mm x 1mm 90 Grease Fitting, (Pack of 10)

Could not pump grease in to fittings even using 3 different brand name grease guns. Head on fitting is smaller than should be. What little tiny bit of grease I could get in to fittings oozed back out thru the ball check valve in the fitting head. Must have been made by the incompetent Chinese. Other good fittings (same size) bought from mcmaster carr in the past work very well.

Perfect for replacing the broken zerk fitting on one of the Bearing Buddy's on my boat trailer. To replace the zerk on a bearing buddy you will need to remove it from the wheel hub because there is an inside nut that will prohibit threading the zerk from the outside. This is easily done by tapping all sides of the Bearing Buddy with a mallet until it comes off. Once off you will need two 5/16 sockets to remove the old zerk, one for the zerk and one for the nut inside the keeper. Once replaced tap it back onto the hub, fill with grease and it's done. Took about 5 minutes.

Don't waste your money and time. They all leak. Some leak at the 90, others leak back out the spring hole. I used 5 of them, every single one leaked. Waiting on another brand so I can pull these back off and return them. Waste of time and money.

Glad that I could get 100 fittings of the size needed instead of an assortment with a bunch of fittings I never need. Fairly priced as well.

I needed 90 degree grease fittings to provide easy access to my Moog Inner Tie Rod ends. The 1/4-28 was the correct thread size for my Tie Rod ends.