The UK Home of Triple Aught Design. Shop TAD from our UK stock here at heinnie.com. Whether on your toughest missions or in your everyday adventures, Triple Aught Design (TAD) know that exceptional quality and engineered functionality will help you succeed. In the military, teams and equipment are deemed mission capable when they are ready to perform any operation within their scope. Wherever your missions take you, they know that you depend on their gear to help you achieve your objectives and get you home safely. TAD take that responsibility seriously. Engineers and machinists use 000 (triple aught) as shorthand for a thousandth of an inch, which has been the high standard of precision tolerance for over a century. Inspired by that ideal, TAD apply this thorough design, high attention to detail, and strict tolerances to ensure their products meet your most rigorous needs. Triple Aught Design is headquartered in the Dogpatch, a historical warehouse and factory district along San Francisco’s eastern waterfront. With the Pacific to the west and the Sierras to the east, spectacular landscapes to inspire their designs and rugged wilderness areas test their products.