Specification Brand : uxcell BulletPoint1 : Thread Size: M10/0.4"; Product Name: Hex Flange Nut; Material: 304 Stainless Steel BulletPoint2 : Weight: 44g; Package Content: 4pcs x Hex Flange Nut BulletPoint3 : Main Color: Silver Tone; Height: 10mm/0.4"(Total.Height) BulletPoint4 : Hex Size: 15mm/0.6"(Hex.Width); Flange Diameter: 22mm/0.87" BulletPoint5 : Grade: 4.8; Pitch: 1.25mm Color : Silver ConnectorType : Plug CustomerPackageType : Standard Packaging DriveSystem : External Hex ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 602451642008 ExternallyAssignedProductIdentifier2 : 0602451642008 ExternallyAssignedProductIdentifier3 : 0738287503517 ExternallyAssignedProductIdentifier4 : 0014973271848 ExternallyAssignedProductIdentifier5 : 00738287503517 FinishType : Silver GpsrSafetyAttestation : 1 GradeRating : Grade 8 ItemName : uxcell M10x1.25mm Thread UNF Serrated Hex Flange Lock Nuts 4pcs ItemPackageDimensions_Height : 8.89 centimeters ItemPackageDimensions_Length : 1.7018 centimeters ItemPackageDimensions_Width : 5.9944 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flange-nuts Manufacturer : uxcell Material : Stainless Steel MaximumShearStrength : 130 ksi MeasurementSystem : Metric MetalType : Stainless Steel MetalType1 : Carbon Steel MetalType2 : Alloy Steel ModelName : 507-1 ModelNumber : SYNCE006941 NumberOfItems : 10 NumberOfPieces : 4 PackageLevel : unit PartNumber : a16033100ux0385 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.