Specification Brand : Vermont Gage BulletPoint1 : Class X tolerance per ANSI B1.2 BulletPoint2 : Manufactured from Chrome plated Tool Steel; 70/72 Rc BulletPoint3 : Pitch Diameter:.2764"/.2803" BulletPoint4 : Certificate of Accuracy included; NIST traceable BulletPoint5 : Efficient Identification, Time Saving Tool: Easily screw a nut or bolt onto a thread gauge and accurately check the size in seconds. With the standard and metric thread checker, you can quickly verify the size of nuts and bolts to replace damaged, loose, rusty old parts in your home or garage. Say goodbye to Guess size checks at the hardware store and increase your productivity. This bolt sizing and thread gauge kit is a great assistant for repairmen, mechanics and contractors, and is ideal for DIY enthusiasts, suitable for gifting to friends and family Color : Silver & Black ExternallyAssignedProductIdentifier1 : 662631305956 ExternallyAssignedProductIdentifier2 : 0662631305956 ExternallyAssignedProductIdentifier3 : 00662631305956 ItemDisplayWeight : 0.9 pounds ItemName : Vermont Gage 301129550 5/16"-18 UNC 3B Go And No-Go Taperlock Gage Assembly ItemPackageDimensions_Height : 2.032 centimeters ItemPackageDimensions_Length : 10.922 centimeters ItemPackageDimensions_Width : 2.032 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : thread-gauges KeyboardDescription : Flexible Manufacturer : Vermont Gage Material : Tool Steel ModelName : 44 Thread Checker with Toolbox ModelNumber : 44 Thread Checker with Toolbox NumberOfItems : 1 PartNumber : 301129550 ProductDescription : Comfylichi Thread Checker, Nut and Bolt Thread Checker, Bolt Size and Thread Gauge, 44 Individual Bolt and Nut Identifier Gauge (23 Standard & 21 Metric) Especially for Size Check in Tight Spaces ProductSiteLaunchDate : 2010-02-18T00:00:01-00:00 Size : 5/16"-18 UNC Style : Class X, 3B thread style SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 UnspscCode : 27110000