What does 2B mean on thread?
What does 2B mean on thread? Class 2B Thread Consists of a 2A screw in a 2B hole. 2B thread has wide applications. It is used to accomodate plating, finishing and coating to a limited extent and threfore, has fair tolerance allowances.
What does 2A and 2B mean for threads?
Classes 2A-2B Class 2A external threads have an allowance, Class 2B internal threads do not. Classes 2A and 2B, for most engineering applications, offer the optimum thread fit that balances fastener performance, manufacturing convenience and economy.
What is the difference between a 2B and a 3B thread gage?
?Class 2B is the typical fit for commercial products and is used for fasteners and threaded parts. Class 3B is the tightest tolerance and used for close fit and high strength fastening applications where a close and snug fit are required.