This right-angle bulkhead fitting has male 6AN (9/16-18 UNF threads, 37° convex flare) at each end. The standard AN833 style has a tight 90 degree bend which restricts flow, but this full-flow version has a much more generous bend radius. And unlike AN833 fittings, this elbow also includes a matching bulkhead mounting nut. Black anodized aluminum. Sold individually.