United States Navy Petty Officer 3rd Class Rank Insignia Patch E4, Aviation Storekeeper

Petty Officer Third Class is the first of the Navy's Petty Officer grades, the Navy's variation of non-commissioned officers. It is above Seaman and below Petty Officer Second Class. A Petty Officer Third Class serves both as a leader and as a technical expert, and all Petty Officers have a specified rating, or job. The exact title with which a petty officer is addressed depends on their specialty - a Petty Officer Third Class serving as a Machinist's Mate, for example, would have the full title of Machinist's Mate Third Class.

Petty Officer Third Class is the 4th rank in the United States Navy , ranking above Seaman and directly below Petty Officer Second Class. A petty officer third class is a Non-commissioned Officer at a grade of E-4.

Storekeeper (SK) is an enlisted rating in the United States Coast Guard; until 2009 it was also a United States Navy rating, the most common supply rate in U.S. Navy vs. CS (culinary specialist) and SH (Ship's Serviceman) and very much equivalent to the MOS 92 of the U.S. Army. In the Navy this rating, together with PC (postal clerk), has been renamed or superseded by the rating logistics specialist (LS). Merged into Storekeeper on 1 January 2003.

Original Fabric Insignia patch with black backing and silver and red embroidery.