Specification Brand : Small Parts BulletPoint1 : Flanged base eliminates the need for a washer when fastening components BulletPoint2 : Self-locking threads are distorted to resist vibration BulletPoint3 : Hex body has six flat sides that a wrench can grip to turn from the side, enabling use when there is no space above the nut BulletPoint4 : Grade G steel is often used in applications where strength is the primary consideration, while black phosphate and oil finish provides corrosion resistance and lubricity BulletPoint5 : Meets IFI 100/107 specifications Color : Black DriveSystem : External Hex ExteriorFinish : Black Phosphate FinishType : black_phosphate GpsrSafetyAttestation : 1 GradeRating : Industrial ItemName : Grade G Steel Hex Flange Nut, Black Phosphate & Oil Finish, Self-Locking Distorted Threads, Meets IFI 100/107, 1/4"-20 Threads, Meets IFI 100/107, 0.439" Width Across Flats, 0.300" Overall Height (Pack of 100) ItemPackageDimensions_Height : 12.7 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 12.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flange-nuts Manufacturer : Small Parts Material : Steel MaximumShearStrength : 2000 N MeasurementSystem : Inch MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Alloy Steel ModelNumber : a18091200ux0113 NumberOfItems : 100 NumberOfPieces : 100 PackageLevel : unit PartNumber : B009K5KIVW 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.