M20-2.5 DIN 985 Class 8 Zinc Finish Steel Nylon Insert Lock Nut / THREAD CLASS: 6H THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT NUT STYLE: A12 HEXAGON NUT HEIGHT: 19.4 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: MASTIFF 3 WIDTH ACROSS FLATS: 29.6 MILLIMETERS NOMINAL TEMP RATING: 200.0 DEG CELSIUS MAXIMUM THREAD SERIES: M HARDNESS RATING: 40.0 ROCKWELL A NOMINAL NOMINAL THREAD SIZE: 20.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 2.5 BEARING SURFACE TYPE: FLAT MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: DIN985 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL