United States Navy E-4/5/6 Machinery Repairman Rating Badge
Criteria: Worn by Machinery Repairmen (MR) with ranks from Petty Officer 3rd Class (E-4) to Petty Officer 1st Class (E-6). Machinery Repairmen are the machine tool operators of the USN. They make replacement parts and repair of overhaul all of a vessels' engine auxiliary equipment. The equipment includes evaporators, air compressors and pumps. The rating also includes those who operate main propulsion machinery in addition to their machine shop and repair duties.
The badge is sold with all 3 chevrons below the rating for E-6, and can be tailored down to the other two chevrons.