Brass fuel cap fits most Mack B-Model square tanks as well as other models with 2-1/2" 8-UN threads.

– All brass castings for years of corrosion-free performance.
– Fusible elements, in case of fire, melt at 190°F.
– Quality locking feature maintains secure fastening of fuel tank cap to tank.
– All locking caps provided with two keys.
– 8.5″ chain and cross-bar combination prevent loss of cap while refueling.