Specification Brand : M & J Tooling LLC BulletPoint1 : Size - Thread Angle: 60°, Thread Pitch Increment 0.1/ 0.05mm. BulletPoint2 : Material - Made of 2CR13 stainless steel, anti-rust, quality construction for long service life and accurate measuring. BulletPoint3 : Feature - Marked with degrees to provide easy-to-read and accurate values BulletPoint4 : Application - Used to check the angle of the thread-cutting tool, when cutting threads on a lathe, check the pitch of the thread, and help to set the position of the thread-cutting tool. BulletPoint5 : Dimension - Approx 60x20x1.2mm(L*W*T). ExternallyAssignedProductIdentifier : 9182431262286 ExternallyAssignedProductIdentifier1 : 0619191680665 ExternallyAssignedProductIdentifier2 : 619191680665 IncludedComponents : 13UNC-2B ItemName : New 1/2 20 UNJF 3A Thread Ring GAGES .5 .50 .500 GO NO GO P.D.'S = .4675 & .4643 - MS6744GFG ItemPackageDimensions_Height : 9 centimeters ItemPackageDimensions_Length : 1.7 centimeters ItemPackageDimensions_Width : 6.2 centimeters ItemPackageQuantity : 5 ItemTypeKeyword : thread-gauges Manufacturer : M & J Tooling LLC Material : Stainless Steel MeasurementAccuracy : 80% ModelName : Garosabxzue416rq-02 ModelNumber : Garosabxzue416rq-02 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : MS6744GFG ProductDescription : YOU ARE PURCHASING THE PICTURED RIGHT HANDTHREAD RING GAGES.