Image Fuel Delivery Tank Adapter Markets Petroleum Cargo Tanks Jump to Section Product Options Related Products Product Options Part Number Female Thread Size Height Female Thread Material BY4051 4" 3-1/2" NPT Bayloy BZ4051 4" 3-1/2" NPT Bronze BZ4051S 4" 2-3/8" NPSM Bronze Related Products Image 6200-Series Side-Lever Type Drop Elbow Image 6500-Series Self-Locking Drop Elbow Image API Drop Adapter Image Fuel Delivery Adapter Cap Image Single Point Coaxial Delivery/Vapor Recovery Elbow Image Vapor Recovery Tank Adapter