Grease Nipple / Grease Fitting for Lubricating DIN 71412Thread: METRIC, BSP, BSW, BSF, NPT, NPS, UNF, UNS, SAE, DIN. Type: Straight, 45° / 70° / 90°, T shape, Double head type, Long type, Square type.Material: Carbon steel, Alloy steel, Brass.Stainless steel 304 / A2, 316 / A4.Surface Finish: Zinc plating, Plain, Polishing.Size, thread or other specifications can be designed according to your demand. They're widely used for keeping machines in constant motion, Standardized connection to the grease gun for all sort of lubrication needs.