Specification Brand : Xiaoyztan BulletPoint : Made of spring steel, spring nuts are also known as speed nuts, sheet metal nuts or Tinnerman nuts. BulletPoint1 : PACKAGE - 2pcs x 4-Slot Lock Nut (M45). BulletPoint2 : DIMENSIONS - Thread Dia: M45; Thread Pitch: 1.5mm; External Dia: 65mm/2.54. 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 : Brass DriveSystem : Slotted DriveSystem1 : Slotted DriveSystem2 : Cross ExteriorFinish : Black ExternallyAssignedProductIdentifier1 : 602451496885 ExternallyAssignedProductIdentifier2 : 0602451496885 FinishType : black oxidation finish FinishType1 : Oiled FinishType2 : Phosphate Coated GpsrSafetyAttestation : 1 GradeRating : Class 4.8 ItemName : Xiaoyztan 2pcs Slotted Nuts High Hardness Carbon Steel 4-Slot Retaining Nuts Lock Nuts (M45x1.5) ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 4.95 inches ItemPackageDimensions_Width : 2.54 inches ItemPackageQuantity : 1 ItemTypeKeyword : slotted-nuts Manufacturer : Xiaoyztan Material : Carbon Steel MeasurementSystem : Metric MetalType : Carbon Steel MetalType1 : Carbon Steel MetalType2 : Alloy Steel ModelNumber : XYCW2306030079 NumberOfItems : 2 NumberOfPieces : 2 PartNumber : XYCW2306030079 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.