Specification Brand : uxcell BulletPoint1 : Product Name : Hex Flange Nut;Fastener Type : Hex Serrated Flange Nut;Thread Diameter : M8/0.31" BulletPoint2 : Thread Pitch : 1.25mm;Flange Diameter (d1) : 17.5mm/0.68" BulletPoint3 : Width Across Flat Size (s) : 13mm/0.51";Nut Height (m) : 8mm/0.31" BulletPoint4 : Material : Stainless Steel;Color : Silver Tone BulletPoint5 : Net Weight : 173g;Package : 25pcs x Hex Flange Nut Color : Silver DriveSystem : External Hex ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 712662639015 ExternallyAssignedProductIdentifier2 : 0712662639015 ExternallyAssignedProductIdentifier3 : 00008236568219 FinishType : Silver GpsrSafetyAttestation : 1 ItemName : uxcell 25PCS M8 Thread Diameter Stainless Steel Serrated Hex Flange Lock Nuts ItemPackageDimensions_Height : 3.048 centimeters ItemPackageDimensions_Length : 14.732 centimeters ItemPackageDimensions_Width : 17.272 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flange-nuts Manufacturer : uxcell Material : Stainless Steel MeasurementSystem : Metric MetalType : Stainless Steel ModelNumber : a15091700ux0492 NumberOfItems : 8 NumberOfPieces : 8 PartNumber : a15091700ux0492 ProductDescription : 1. Features: 1.25mm pitch, 8mm height, M8 diameter, 2. 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. 3. 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. ProductSiteLaunchDate : 2017-08-01T05:51:15.877Z Size : M8 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 31161700