The grease fitting is used in a bearing.
uxcell Brass Straight Grease Fitting M4 x 0.7mm Thread x 0.7mm, Yellow
uxcell Brass Straight Grease Fitting 1/4"-28 Thread 8mm 1/4" x 0.31", Yellow
uxcell Steel Straight Grease Fitting M8 x 1mm Thread x 1mm, Silver Tone
uxcell 304 Stainless Steel Straight Grease Fitting M10 x x 1mm, Silver
