This Oatey 30203 dark cutting oil is an oil for lubricating and cooling dies and cutting machines during the threading process. It is a mixture of sulfonated and chlorinated oils for high film strength, and it is the dark formula used for high-speed cutting machines. This oil is anti-mist and non-staining for visibility during operation, and it is NSF International registered and U.S. Department of Agriculture (USDA) authorized.

Oatey manufactures residential and commercial plumbing products. The company, founded in 1916, is headquartered in Cleveland, OH.