Specification Brand : uxcell BulletPoint1 : Fastener Type: Hex Serrated Flange Nut BulletPoint2 : Thread Diameter: M5; Thread Pitch: 0.8 ; Flange Diameter(A): 10.5mm/0.41" BulletPoint3 : Width Across Flat Size (B) : 7.8mm/0.31"; Nut Height (M) : 4.8mm/0.19" BulletPoint4 : Constructed from carbon steel, black oxide finish, good rust resistance, and durable to use. BulletPoint5 : Self-locking serrated flange digs into the material being fastened to help prevent loosening. Color : Black ConnectorType : Plug CustomerPackageType : Standard Packaging DriveSystem : External Hex ExteriorFinish : Carbon Steel ExternallyAssignedProductIdentifier1 : 008236729061 ExternallyAssignedProductIdentifier2 : 0008236729061 ExternallyAssignedProductIdentifier3 : 00008236729061 ExternallyAssignedProductIdentifier4 : 0014973271848 ExternallyAssignedProductIdentifier5 : 00738287503517 FinishType : Black Oxide GpsrSafetyAttestation : 1 GradeRating : commercial ItemName : uxcell M5 Serrated Flange Hex Lock Nuts, Carbon Steel Black Oxide Finished 100pcs ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 1.4 centimeters ItemPackageDimensions_Width : 6.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flange-nuts Manufacturer : uxcell Material : Carbon Steel MaximumShearStrength : 130 ksi MeasurementSystem : Metric MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Carbon Steel MetalType1 : Carbon Steel MetalType2 : Alloy Steel ModelName : 507-1 ModelNumber : a21091000ux0132 NumberOfItems : 55 NumberOfPieces : 100 PackageLevel : unit PartNumber : a21091000ux0132 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 breaking 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 the vibration of the nut and increase the holding power of the nut. Specification: Product Name: Hex Flange Nut Material: Carbon Steel Finish: Black Oxide Main Color: Black Thread Size: M5 Height: 4.8mm/0.19" Hex Width: 7.8mm/0.31" Flange Diameter: 10.5mm/0.41" Thread Pitch: 0.8 Package Content: 100pcs x Hex Flange Nut