Specification AgeRangeDescription : little_kid Brand : uxcell BulletPoint1 : Fastener Type: Hex Serrated Flange Nut BulletPoint2 : Thread Diameter: 10#; Thread Size: 24 threads per inch; Flange Diameter(A): 12.5mm/0.49" BulletPoint3 : Width Across Flat Size (B) : 9mm;Nut Height (M) : 5.3mm BulletPoint4 : Made of stainless steel 304, corrosion-resistant and durable to use. BulletPoint5 : Self-locking serrated flange digs into the material being fastened to help prevent loosening. Color : As Picture DriveSystem : External Hex EducationalObjective : 1 ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier : 7665810262630 FinishType : silver GpsrSafetyAttestation : 1 IncludedComponents : screw nuts ItemDisplayDimensions_Height : 0.59 inches ItemDisplayDimensions_Length : 1.18 inches ItemDisplayDimensions_Width : 1.18 inches ItemDisplayWeight : 0.21 pounds ItemName : uxcell #10-24 Serrated Flange Hex Lock Nuts, 304 Stainless Steel, 20 Pcs ItemPackageDimensions_Height : 13.6 centimeters ItemPackageDimensions_Length : 1.9 centimeters ItemPackageDimensions_Width : 9.4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flange-nuts Manufacturer : uxcell ManufacturerMinimumAge : 180 Material : Stainless Steel MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Stainless Steel ModelName : Star Knobs ModelNumber : a18092800ux0904 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : a18092800ux0904 Pattern : Solid ProductDescription : A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer. This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface. The flange may be serrated to provide a locking action. The serrations are angled such that they keep the nut from rotating in the direction that would loosen the nut. Because of the serrations they cannot be used with a washer or on surfaces that cannot be scratched. The serrations help in avoiding vibration of nut and increase the holding power of nut.