Specification Brand : uxcell BulletPoint1 : Total Height: 6.5mm/0.26"; Hex Width: 5.5mm/0.22" BulletPoint2 : Product Name: Cap Nut; Package Content: 100(+/-2%)pcs x Cap Nut BulletPoint3 : Main Color: Black; Material: Nylon BulletPoint4 : Weight: 15g; Thread Size: M3/0.12"(Dia.) BulletPoint5 : Dome Head Size: 5.5 x 3.5mm/0.22" x 0.14"(Max.D*Height) Color : Black DriveSystem : External Hex ExteriorFinish : Nylon ExternallyAssignedProductIdentifier : 8697558852995 FinishType : black GpsrSafetyAttestation : 1 GradeRating : commercial ItemName : uxcell M3 Female Thread Nylon Hex Domed Cap Acorn Nut Black 100pcs ItemPackageDimensions_Height : 12.4 centimeters ItemPackageDimensions_Length : 1.3 centimeters ItemPackageDimensions_Width : 9.8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : acorn-nuts Manufacturer : uxcell Material : Nylon MeasurementSystem : Metric MetalType : Stainless Steel ModelNumber : a17042900ux1263 NumberOfPieces : 100 PartNumber : a17042900ux1263 Pattern : BPA6-W1.1X2.5X0.3 ProductDescription : Features:made from nylon material,dome head,cap acorn hex nuts,black. It is a nut that has a domed top to cover the threads. This is to prevent contact with the external thread to protect the threads or protect other things the threads would rub against. Aesthetic sophistication,can play a good role in decoration. To prevent being threaded scrape.