The item ID for Bear Pelt in Skyrim on Steam (PC / Mac) is:
To spawn this item in-game, open the console and type the following command:
player.AddItem 0003AD52 1
To place this item in-front of your character, use the following console command:
Bear Pelt is obtained when a bear is killed and looted, it can also be obtained via other means such as purchasing from merchants. They are required for the Grin and Bear It quest, and are commonly converted into four pieces of leather (which can be done at a Tanning Rack).