Specification Brand : M & J TOOLING LLC BulletPoint1 : Nominal diameter: M1 BulletPoint2 : Thread Pitch: 0.25mm BulletPoint3 : T pass and Z not pass. Class 6H. BulletPoint4 : The product images are for reference only. BulletPoint5 : It was made by stainless steel, with wire drawing on the surface, not easy to rust. Ensure the accuracy of measurement ExternallyAssignedProductIdentifier : 4895192455204 ItemName : New 7/16 28 UNEF 2B Thread Plug GAGE .4375 GO NO GO P.D.'S= .4143 & .4189 Tool ItemPackageDimensions_Height : 8.89 centimeters ItemPackageDimensions_Length : 1.016 centimeters ItemPackageDimensions_Width : 1.778 centimeters ItemTypeKeyword : thread-gauges Manufacturer : M & J TOOLING LLC Material : Alloy tool steel ModelNumber : EPC_MEA_001 NumberOfItems : 1 PartNumber : AY0360MJ ProductDescription : YOU ARE PURCHASING THE PICTURED THREAD PLUG GAGE.