Specification Brand : uxcell BulletPoint : Trim-Lok Hollow Tubing, Auto Fender Gap Seal, Bicycle Cable and Brake Hose Cover, Steel Wire Protector and Conduit, Home Duct O-Ring Replacement - .38” Outside Dia, 25” Inside Dia, 25’ Length BulletPoint1 : Product Name: Gasket Seal Ring; Package Content: 100 (+/-2%) x Gasket Seal Rings BulletPoint2 : Inner Diameter(B): 4mm(M4)/0.16"; Color: Black BulletPoint3 : Weight: 10g; Material: Plastic BulletPoint4 : OD(A): 10mm/0.4" BulletPoint5 : Thickness(T): 1mm/0.04" Color : Black Configuration : .38 inch outside diameter; .028 inch inside diameter CustomerPackageType : Standard Packaging ExteriorFinish : Copper ExternallyAssignedProductIdentifier1 : 712662029878 ExternallyAssignedProductIdentifier2 : 0712662029878 GpsrSafetyAttestation : 1 IncludedComponents : X313-25 ItemName : uxcell M4x10mmx1mm Plastic Round Flat Washer Gasket Seal Ring Black 100 Pcs ItemPackageDimensions_Height : 1.2 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : mechanical-seals Manufacturer : uxcell Material : Nylon MetalType : Copper ModelName : AX313-25 ModelNumber : a15062200ux0412 NumberOfItems : 1 NumberOfPieces : 100 PartNumber : a15062200ux0412 Pattern : AX313-25 ProductDescription : Normally used to distribute loads of threaded bolts, screws and nuts evenly as the fastener is tightened. Intended for the general use under the head of a bolt or nut in order to provide a smooth-bearing surface. Flat nylon insulation spacer washer gasket ring, it is great for mounting between PCB circuit boards and machine boards.