Specification Brand : Xiaoyztan BulletPoint1 : PACKAGE - 5pcs x 4-Slot Lock Nut (M30). BulletPoint2 : DIMENSIONS - Thread Dia.: M30; Thread Pitch: 1.5mm; External Dia.: 46mm/1.79". BulletPoint3 : MATERIAL - Made from high hardness carbon steel with black oxidation finished. BulletPoint4 : APPLICATION - Built with 4 slots for fixing, mainly used for roller bearing, axial shaft, pump valve, etc. BulletPoint5 : DIFFERENCE NOTICE - Please allow 1-3mm measurement difference due to manual measurement and a certain degree of color difference caused by camera lenses, different phone screens, and different monitors. Color : black DriveSystem : Slotted DriveSystem1 : Slotted DriveSystem2 : Cross ExteriorFinish : Black ExternallyAssignedProductIdentifier1 : 744337418427 ExternallyAssignedProductIdentifier2 : 0744337418427 FinishType : black oxidation finish GradeRating : Class 4.8 ItemName : Xiaoyztan 5pcs 4-Slot Retaining Nuts Lock Nuts Slotted Nuts High Hardness Carbon Steel (M30x1.5) ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 4.88 inches ItemPackageDimensions_Width : 4.29 inches ItemPackageQuantity : 1 ItemTypeKeyword : slotted-nuts Manufacturer : Xiaoyztan Material : Carbon Steel Material1 : Zinc Material2 : Steel MetalType : Carbon Steel MetalType1 : Zinc MetalType2 : Carbon Steel ModelNumber : XYCW2306030076 NumberOfItems : 5 PartNumber : XYCW2306030076 ProductDescription : Features: The material has high hardness, and the clear thread can effectively prevent loosening. Built with femal thread and 4 slots for well fixing, mainly used for roller bearing, axial shaft, pump valve, etc. Notice: accessory parts only, the related tools are NOT included, professional installation is high recommended, please ensure that you know how to intall and check the size before purchase. Batch-production & Manual Measurement: Please allow 1-3mm measurement difference due to manual measurement and a certain degree of color difference caused by camera lenses, different phone screens, and different monitors.