This stud adapter converts a 1/4"-20 thread air cleaner stud to accept 5/16"-18 thread hardware, made of steel with a zinc oxide finish.
Spec Sheet: Allstar Spec Sheet
Compatibility
Universal fit. Sized for adapting 1/4"-20 studs to 5/16"-18 thread hardware; not matched to a particular make or model.
FAQ
What does this adapter convert between?
This adapter converts a 1/4"-20 stud thread to accept 5/16"-18 thread hardware.
What is this adapter made of?
This adapter is made of steel with a zinc oxide finish.

