The grease fitting is used in a bearing.
uxcell 201 Stainless Steel Straight Grease Fitting M10 x x 1mm, Silver
uxcell 304 Stainless Steel Straight Grease Fitting M10 x 1mm Thread x
uxcell 304 Stainless Steel Straight Grease Fitting M6 x 1mm Thread x
uxcell 2Pcs Metric 316 Stainless Steel Straight Grease Fitting M6 1mm, Silver
2Pcs Stainless Steel T-Bolt Hose Clamp, Adjustable OD Range 201-213mm
15 Pcs Mini Stainless Steel Wire Brush Set for Cleaning stainless steel