Industrial Bulk Head Fitting

• 1/2″ – needs a hole drilled no smaller than 1.5 inches.
• 1″ – needs a hole drilled no smaller than 2.25 inches.
• 1.5″ – needs a hole drilled no smaller than 3 inches.
• 2″ – needs a hole drilled no smaller than 3 inches.
• 3″ – needs a hole drilled no smaller than 4.5 inches.
• 4″ – needs a hole drilled no smaller than 6 inches.