Specification Brand : M & J TOOLING LLC BulletPoint1 : 1. The product is used to test that the internal thread size of the workpiece is within tolerance. BulletPoint2 : 2. Thread plug gauge under 100mm is taper shank thread plug gauge. BulletPoint3 : 3. Thread plug gauge over 100 mm is double screw thread plug gauge. BulletPoint4 : 4. High performance bearing steel, good stability and high hardenability. BulletPoint5 : 5. Plug gauges and ring gauges cannot be mutually verified. ExternallyAssignedProductIdentifier1 : 0763769022842 ExternallyAssignedProductIdentifier2 : 763769022842 IncludedComponents : 44-Piece Nut and Bolt Thread Gauge Set ItemName : New 1" 8 UNC 2B Thread Plug GAGE 1.0 GO NO GO P.D.'S = .9188 & .9276 Inspection ItemPackageDimensions_Height : 2 inches ItemPackageDimensions_Length : 12 inches ItemPackageDimensions_Width : 8.8 inches ItemPackageQuantity : 1 ItemTypeKeyword : thread-gauges Manufacturer : M & J TOOLING LLC Material : Steel MeasurementAccuracy : 1-12 to 6-32 inch and M3x0.5 to M24x3.0 metric NumberOfItems : 1 PartNumber : CH1195MJ ProductDescription : YOU ARE PURCHASING THE PICTURED THREAD PLUG GAGE.