Here's a larger version of our popular Monza caps. Maximum lid dimension from catch to hinge is 100mm.
Cap lid nominal diameter 75mm. It has a vented, sprung rubber seal and a screw-in threaded brass ring which will fit nicely over a 57mm diameter tube and can be soldered or bonded in place. Weight 343 gms.
CHROME MONZA FUEL CAP #MON51