Specification Brand : Taps - Pipe BulletPoint1 : Size:: 4" - 8 National Taper Pipe BulletPoint2 : High Speed Steel BulletPoint3 : NPT=3/4" per foot taper. BulletPoint4 : Ground Threads. BulletPoint5 : Makes a thread for standard "4" Pipe" - the actual thread dimension is greater than 4". GpsrSafetyAttestation : 1 ItemName : 4"-8 NPT National Pipe Taper Pipe Tap, High Speed Steel ItemPackageDimensions_Height : 16.5 centimeters ItemPackageDimensions_Length : 5 centimeters ItemPackageDimensions_Width : 12.2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : pipe-taps Manufacturer : Taps - Pipe Material : high speed steel MeasurementSystem : Imperial ModelNumber : DECK-2303 NumberOfBoxes : 1 PartNumber : NPT-4 ProductDescription : The "pipe size" listed (such as 1/2"-14) gives the inside diameter of the pipe this tool is intended to be used for, followed by the threads per inch the tap will cut. ProductSiteLaunchDate : 2005-02-13T00:00:00.000Z Size : 6 Piece NPT Tap SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 UnspscCode : 27111700