45 Degree Grease Nipples
45 Degree Grease Nipples are available in zinc plated steel and stainless steel from stock.
Grease fittings are permanently installed by a threaded connection, leaving a nipple connection that a grease gun attaches to. The pressure supplied by the grease gun forces a small captive bearing ball in the fitting to move back against the force of its retaining spring. The arrangement is essentially a valve that opens under pressure to allow lubricant to pass through a channel and be forced into the voids of the bearing.