Indmar Chevy standard-size thread oil pan drain fitting. Used for Connecting an oil drain hose to the bottom of the oil pan to make changing the oil easier. Please note that GM Switched back and forth from Metric to Standard, the only way to verify is by removing your old fitting and measuring the threads.

Product Specs:

• Standard Thread
• For Chevy Engines with a Metric Thread use Indmar Part# 511003
• Machined Brass
• Required Gasket Sold Separate Indmar Part# 515002
• Sold individually