336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing

This U.S. industry comprises establishment primarily engaged in (1)
manufacturing aircraft parts or auxiliary equipment (except engines and
aircraft fluid power subassemblies) and/or (2) developing and making
prototypes of aircraft parts and auxiliary equipment. Auxiliary
equipment includes such items as crop dusting apparatus, armament
racks, inflight refueling equipment, and external fuel tanks. 

The data published with NAICS code 336413 include the following
SIC industry:

3728 Aircraft parts and equipment, n.e.c. (pt)