what size ebay bit do i need?

[markl]

need to drill glass to install a 1/2" bulkhead wondering what size bit do i need to order on ebay

 

[johnr2604]

1 1/8 or metric equavalent for most standard sch 40

 

[theplatypus]

Marine Depot lists the hole size requirements with the bulkheads.

 

[johnr2604]

DHS also list the through 1 inch which is where I got it from. Th size I gave you is for 1/2 inch bulkhead because I have the 1" bit Mark.