Nipples have the following characteristics:

• Zinc plated
• All thread
• NPSM straight pipe

*”IP” is trade size, not the outer diameter. Reference below for Diameters

• 1/8″ IP = .375″-.380″ (3/8″) OD
• 1/4″ IP = .500″-.510″ (1/2″) OD
• 3/8″ IP = .625″-.635″ (5/8″) OD
• 1/2″ IP = .800″-.810″ (3/4″) OD