Fittings - AdaptersOxygen Nut For Barb FittingSKU: W-7 Nut for use with oxygen barbs. Interested in pricing and more information about this product? Quantity Add to cart Add to quote Related products Fittings - AdaptersReusable 1/4″ x O2 Fitting – 99R View product Fittings - Adapters1/2″ x O2 Oxygen Adapter View product Fittings - AdaptersReusable 1/2″ x #10JIC Fitting View product