Specification Brand : uxcell BulletPoint1 : [THREADED SIZE] - M20 x 1.5mm BulletPoint2 : [DIMENSION] - 1.34" (34mm) outer diameter, 0.31" (8mm) height. BulletPoint3 : [MATERIAL] - Constructed from carbon steel, oxidized black finished, good rust resistance. BulletPoint4 : [FEATURE] - Design with thread inside, 4-slot slotted round nut. BulletPoint5 : [APPLICATION] - Widely used for roller bearing, axial shaft, pump valve, etc. Color : Black DriveSystem : Slotted ExteriorFinish : Carbon Steel ExternallyAssignedProductIdentifier : 4670244542725 FinishType : Black GradeRating : Aerospace ItemName : uxcell M20x1.5mm Retaining Four-Slot Slotted Round Nuts, 2 Pcs ItemPackageDimensions_Height : 14.732 centimeters ItemPackageDimensions_Length : 1.016 centimeters ItemPackageDimensions_Width : 6.858 centimeters ItemTypeKeyword : slotted-nuts Manufacturer : uxcell Material : Carbon Steel MetalType : Carbon Steel ModelNumber : a19030500ux1004 NumberOfItems : 50 NumberOfPieces : 2 PartNumber : a19030500ux1004 ProductDescription : - Made of carbon steel, oxidized black finished, good rust and corrosion resistance. - The pitch and spiral angle of the fine thread is smaller, which is more conducive to the self-locking, so the fine thread are generally used in places where it is necessary to prevent loosening. - Design with thread inside, 4-slot slotted round nut. - Operated with hook spanners (not included here). - Widely used for roller bearing, axial shaft, pump valve, etc.