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 3/8″ x O2 Fitting – Lifestar View product Fittings - Adapters#6JIC Nut View product Fittings - AdaptersReusable 3/8″ x O2 Fitting – Lenz 112R View product