Shall not be assigned to an employer engaged in operations described by another classification unless the operations subject to this classification are conducted as a separate and distinct business.        

Code 3145 applies to employers engaged in manufacturing automatically turned wood and machine screws.  The raw material is usually wire stock of steel or brass received from others.  The stock is automatically fed into the screw machines where it goes through the respective operations of cutting off, tapering, shaving, threading and slotting to form the screws.  The completed screws may then be placed in extractors to remove the oil accumulated during the machining process.  In some cases, the screws are mechanically plated and buffed.

This classification is also applied to employers engaged in manufacturing miscellaneous products utilizing automatic screw machines involving the above operations, the only difference being in the raw material, which is usually bar stock of steel or brass received from others.

This classification may not be used in those instances where a bona fide machine shop may employ automatic screw machines to turn out parts that may go into some final product of the machine shop.