DOT Air Fittings Co. is a family-owned and operated business proudly serving the heavy-duty truck and trailer industry since 1966. Our Brick and Mortar store, Capitol Clutch and Brake, is located in West Sacramento, CA. For nearly six decades, we’ve built our reputation on honesty, craftsmanship, and a commitment to keeping America’s trucks and trailers moving safely and reliably.
What started as a small family operation has grown into a trusted source for high-quality DOT-approved air fittings, components, and accessories used by fleets, mechanics, and owner-operators across the country. Through every chapter of our history, one thing has never changed: our dedication to delivering products that meet the highest standards of safety and performance.
What We Stand For
Heritage & Expertise
With decades of hands-on experience, we understand the demands of the heavy-duty world. Our team combines deep product knowledge with real-world insight, ensuring our customers always get the right parts for the job.
Family Values, Modern Service
Though our business has grown, our values have stayed the same. We treat every customer like part of the family — with respect, integrity, and service you can trust. Whether you’re maintaining a single truck or outfitting an entire fleet, we’re here to provide the support and expertise you need.
Proudly Serving the Heavy-Duty Community Since 1966
From our beginnings in 1966 to today, our mission remains unchanged:
deliver reliable parts, honest service, and the experience to help keep your equipment on the road.