Click to expand Tap to zoom Haltec MB-26 Mega Bore Screw in Spud Valve Base - 3/4" NPT by Haltec Corporation No reviews $18.99 | / SKU HTMB26 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Haltec's MB-26 Mega Bore screw in spuds are designed to work with 3/4" NPT valve holes. Attach any Mega Bore angle connector to the MB-26 spud and the spud can be changed without demounting the tire. Manufactured from solid brass.