Bulkhead 1" Thread/Thread (black)

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Hole size chart for schedule 40 standard bulkheads (the black ones) bulkhead Size: 1/2" = Hole Size: 1 1/8" or 1 1/4" bulkhead Size: 3/4" = Hole Size: 1 1/2" bulkhead Size: 1" = Ho le Size: 1 3/4" bulkhead Size: 1 1/2" = Hole Size: 2 3/8" bulkhead Size: 2" = Hole Size: 2 7/8" Hole saw size 30mm Glass Drill bit works with 1/2" schedule 40 standard bulkheads 35mm Glass Drill bit works with 3/4" schedule 40 standard bulkheads 45mm Glass Drill bit works with 1" schedule 40 standard bulkheads 60mm Glass Drill bit works with 1.5" schedule 40 standard bulkheads Show more