The data published with NAICS code 333996 include the following SIC industries:
3594 Fluid power pumps and motors
3728 Aircraft parts and equipment, n.e.c. (pt)
This definition comes from the 1997 NAICS manual. However, for this industry, the 1997 Economic Census Manufacturing implemented the conversion to NAICS differently. Data for NAICS industry 333995 include establishments primarily engaged in the manufacture of aerospace-type fluid power actuators. The NAICS definitions will be fully implemented with the 2002 Economic Census.