Specification Brand : uxcell BulletPoint1 : Fastener Type: Hex Serrated Flange Nut BulletPoint2 : Thread Diameter: M8; Thread Pitch: 1.25mm; Flange Diameter(A): 18mm/0.7" BulletPoint3 : Width Across Flat Size (B) : 13mm;Nut Height (M) : 7.8mm BulletPoint4 : Made of stainless steel 201, wear-resisting and durable to use. BulletPoint5 : Self-locking serrated flange digs into the material being fastened to help prevent loosening. BulletPoint6 : Quantity per pack: 10 pcs, 2 colors available BulletPoint7 : The PVD bluing process makes each screw unique in color and enhances acid corrosion resistance. BulletPoint8 : The PVD gold plating process makes every screw dazzling, shiny and wear-resistant. Color : Clear DriveSystem : External Hex ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 602451942801 ExternallyAssignedProductIdentifier2 : 0602451942801 ExternallyAssignedProductIdentifier3 : 00602451942801 FinishType : silver GpsrSafetyAttestation : 1 GradeRating : commercial IncludedComponents : Lisle - Nut For 65600 (65660) ItemDisplayWeight : 0.8 pounds ItemName : uxcell M8 Serrated Flange Hex Lock Nuts, 201 Stainless Steel, 10 Pcs ItemPackageDimensions_Height : 11.7 centimeters ItemPackageDimensions_Length : 3.4 centimeters ItemPackageDimensions_Width : 8.2 centimeters ItemPackageQuantity : 1 ItemShape : Hexagonal ItemTypeKeyword : flange-nuts Manufacturer : uxcell Material : Stainless Steel Material1 : Stainless Steel Material2 : Titanium MeasurementSystem : Inch MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Stainless Steel ModelName : 65660 ModelNumber : a18092200ux0073 NumberOfBoxes : 1 NumberOfItems : 70 NumberOfPieces : 10 PackageLevel : unit PartNumber : a18092200ux0073 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.