Whether you require a production run or an emergency response, Cardinal Fastener meets your needs with products manufactured to API (American Petroleum Institute) standards and guidelines. Using American-made steel, Cardinal supplies all grades, head styles, and diameters.

• Grade B7, A320, Grade 8 with Charpy Impact Testing
• Hex, Heavy Hex, Socket and 12 Point Flange
• Diameters ½” through 4-1/2” and M20 through M72

​Our innovative Birdie Chart is a one-page catalog for quick look-up of any of our products. We maintain the largest stock of manufactured certified bolt blanks in the industry, so we can manufacture and ship most orders the same day we receive your order.