When you need raw aluminum stock, the first decision is usually whether you want a wide, thin plate or a thicker, more compact bar. Both of these listings are 6061 aluminum, new, and made in the United States, but they solve different problems. The 12\" x 12\" plate gives you a large face for cutting out parts, while the 1/2\" x 8\" x 8\" flat bar gives you serious thickness in a smaller footprint. The listed-price gap between them is $11.12.
Quick Verdict
The 12\" x 12\" 6061 plate is the lower-priced pick and offers roughly twice the surface area of the flat bar. Choose it when you need a wide blank for layouts, gussets, or panels. The 1/2\" flat bar is the higher-priced pick and gives you double the thickness, making it a better fit for spacers, risers, and fixture blocks where a sturdy cross-section matters more than a big face.
Comparison at a Glance
| Product | Listed Price | Key Specs | Price Bar |
|---|---|---|---|
| 1/4\" Aluminum Plate 12\"X 12\" 6061 Alum Plate Stock T6 (+/-) 1/8\" (Not Cosmetic | USD 29.87 | 12\" x 12\" x 1/4\", 6061-T6, New, USA | |
| 6061 Aluminum Flat Bar, 1/2\" x 8\" x 8\" long, Solid Stock, Plate, Machining | USD 40.99 | 8\" x 8\" x 1/2\", 6061-T6511, New, USA |
Where Each Product Wins
The 12\" x 12\" plate wins on surface area and listed price. It covers 144 square inches, which is about double the flat bar\'s 64 square inches, and it costs $29.87. The 1/2\" flat bar wins on thickness and temper. It is twice as thick at 1/2\", uses T6511 temper, and costs $40.99.
1/4\" Aluminum Plate 12\"X 12\" 6061 Alum Plate Stock T6 (+/-) 1/8\" (Not Cosmetic

This is the lower-priced option and the one to choose when you need a broad aluminum face. The 12\" x 12\" footprint with 1/4\" thickness works for flat patterns, brackets, and cut-to-size pieces. It is 6061-T6, new, and made in the United States. The listing is clearly labeled as not cosmetic, so expect possible minor scuffs or scratches and a stated tolerance of +/- 1/8\". If you need a cleaner surface, the description notes the sheet can be buffed or polished. Pick this one when surface area matters more than thickness and you want the lower listed price.
6061 Aluminum Flat Bar, 1/2\" x 8\" x 8\" long, Solid Stock, Plate, Machining

This is the higher-priced option and the one to choose when you need a thick, compact 6061 blank. The 1/2\" thickness is double that of the plate, and the 8\" x 8\" footprint is easy to flip and machine. It is 6061-T6511, new, and made in the United States. The description notes a machined finish with normal scratches or nicks, so do not expect a finished surface. The stated thickness/width tolerance is -.002\" to +.020\", and the length tolerance is +.000\" to +.250\". Use this for spacers, risers, mounting blocks, or any part where the extra 1/2\" thickness gives you the stiffness you need.
Final Choice by Use Case
If you are cutting out wide parts or need a generous layout surface on a tighter budget, go with the 12\" x 12\" 6061 plate. If you need a thick, compact block with a tighter dimensional tolerance for fixtures or spacers, the 1/2\" x 8\" x 8\" flat bar is the better fit. Both are solid 6061 aluminum choices; the right one simply comes down to whether surface area or thickness matters more for your project.