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 Assortment 5/16" x 0.39", Yellow
uxcell Steel Straight Grease Fitting M8 x 1mm Thread x 1mm, Silver Tone
uxcell Steel Straight Grease Fitting M6 x 1mm Thread x 1mm, Silver Tone
