The softer metal is less expensive than 5250 alloy and more easily machined. The hinges come in 0.040, 0.050, and 0.060-in. leaf thicknesses with 0.50-in. knuckles and various widths. Aluminum ...

Ringbrothers, the company that introduced billet aluminum hood hinges to the muscle car industry now offers billet aluminum hood hinges kits is for the classic 1967-1972 Chevy/GMC Trucks.

The Z Flip 7 and Z Flip FE hinges will continue to use steel internally. All Galaxy foldables, however, appear set to retain the premium Armor Aluminum hinge cover and frame material.

For restomods, Metrom Performance’s new billet aluminum hood hinges for ’65-’70 Mustangs are a big improvement over the factory stamped steel hinges. HOT ROD Staff Writer Aug 31, 2011.