Youngstown State University Department of Engineering Techno

Youngstown State University Department of Engineering Technology DDT 1504: Drafting and Plan Reading Exercise 2A Name: Thread Exercise: Translate the following Thread notations: 1. 1.00-16-UNC-2A 2 1.00-16-UNC-2B 3 .625.18UNF-3A-LH 4. 1.25.32 UNEF-3A 5. 1.125-24 UN-1A, 2.25 6 a 24-UNC-2A %-18 NPT 8, M8-1.0 9 %24-DRYSEAL-NPTF (unique to oil and Gas) Screw Thread Terms Major Diameter Nominal Diameter Countersink Threads per Inch ACME thread Unified thread American Standard Pipe

Solution

For example, let a thread notation be coaded as \"aa-bb--ccc-dd\".

Here, the first digit \"aa\" denotes the major diameter of the thread in inches.

\"bb\" denotes the TPI of the thread (or Teeth per inch).

\"ccc\" is the description of the thread series.

\"dd\" denotes the class of thread fit.

So,

1) 1.00-16-UNC-2A:

2) 1.00-16-UNC-2B:

3) 0.625-18-UNF-3A-LH:

4) 1.25-32-UNEF-3A: