Panel Board Blanks | McMaster-Carr

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Specifications Met

ANSI A208.2

BS 1088

CARB Compliant 17 CCR 93120

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Softwood Grade

No. 1 Premium Softwood

No. 2 Premium Softwood

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156 Products

Plywood Sheets

Made of thin layers of wood glued together under heat and pressure, plywood sheets are durable, yet lightweight. The direction of the wood grain alternates with each layer—known as opposing grain—making these sheets strong enough for building ramps and shelves or repairing holes in floors and ceilings. Opposing grains also limit movement, keeping each layer from expanding or contracting too much—otherwise moisture could warp and split these sheets apart. All are made of real wood, so you can drill, saw, sand, paint, and stain them.

CDX Plywood—CDX-grade plywood sheets are best for applications that will be painted or covered by another material. They can be briefly exposed to moisture, such as during construction, but shouldn't be exposed long term. One side is C-grade, so it may have minor surface defects and knots. The other side is D-grade, which may have more defects and bigger knots.

Marine Plywood—Marine-grade plywood sheets meet BS 1088, an international standard for plywood made from water- and fungus-resistant hardwood. Often used to make boats, their layers are bonded with waterproof glue, so they won’t bubble, buckle, or delaminate with long-term exposure to weather and water. Boiling temperatures and steam aren’t a problem either. Compared to CDX plywood sheets with the same thickness, these sheets have thinner layers and more of them, making this plywood stronger and denser. Each layer is made from one piece of wood, so there are no gaps in the middle layers that could weaken the sheet or leave a rough edge when you cut or sand it. The outer layers have a finished appearance that doesn’t need to be painted.

3/4" Thick—For load-bearing applications, use ¾"-thick sheets.

			12" × 12"		12" × 24"		24" × 24"		24" × 36"		24" × 48"		36" × 48"		48" × 48"		48" × 96"
	Thk.	Thk. Tolerance		Each		Each		Each		Each		Each		Each		Each		Each
CDX Plywood



		3/8"	-1/8" to 0.125"	00000000	00000	00000000	00000	00000000	00000	00000000	000000	———	0	00000000	000000	———	0	———	0


		1/2"	-1/8" to 0.125"	00000000	0000	00000000	0000	00000000	00000	00000000	00000	00000000	000000	00000000	00000	00000000	000000	———	0
		3/4"	-1/8" to 0.125"	00000000	0000	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000	———	0


		Marine Plywood



				1/4"	-0.040" to 0.016"	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	000000	00000000	0000000


				3/8"	-0.050" to 0.016"	0000000	00000	0000000	00000	0000000	00000	0000000	00000	———	0	0000000	00000	———	0	———	0
				1/2"	-0.065" to 0.020"	0000000	00000	0000000	00000	0000000	00000	0000000	00000	00000000	00000	0000000	000000	00000000	000000	00000000	000000
				3/4"	-0.080" to 0.028"	0000000	00000	0000000	00000	0000000	00000	0000000	00000	00000000	000000	0000000	000000	00000000	000000	00000000	000000
				1"	-0.065" to 0.035"	00000000	00000	00000000	00000	00000000	00000	00000000	000000	00000000	000000	00000000	000000	———	0	———	0

Medium Density Fiberboard Sheets

Also known as MDF, these fiberboard sheets are smoother, denser, and more uniform than real wood, so they are often used as spoilboard and shelves. They meet the indoor formaldehyde emission requirements of ANSI A208.2 and the California Air Resources Board (CARB).

	Thk. Tolerance		Each
12" × 12"



	1/4"	-0.005" to 0.005"	0000000	00000


	3/8"	-0.005" to 0.005"	0000000	0000
	1/2"	-0.005" to 0.005"	0000000	0000
	3/4"	-0.005" to 0.005"	0000000	00000
	1"	-0.005" to 0.005"	0000000	00000


	12" × 24"



			1/4"	-0.005" to 0.005"	0000000	0000


			3/8"	-0.005" to 0.005"	0000000	00000
			1/2"	-0.005" to 0.005"	0000000	00000
			3/4"	-0.005" to 0.005"	0000000	00000
			1"	-0.005" to 0.005"	0000000	00000


			12" × 72"



					1/4"	-0.005" to 0.005"	0000000	00000


					3/8"	-0.005" to 0.005"	0000000	00000
					1/2"	-0.005" to 0.005"	0000000	00000
					3/4"	-0.005" to 0.005"	0000000	00000
					1"	-0.005" to 0.005"	0000000	00000


					24" × 24"



							1/4"	-0.005" to 0.005"	0000000	00000


							3/8"	-0.005" to 0.005"	0000000	00000
							1/2"	-0.005" to 0.005"	0000000	00000
							3/4"	-0.005" to 0.005"	0000000	00000
							1"	-0.005" to 0.005"	0000000	00000


							24" × 36"



									1/4"	-0.005" to 0.005"	0000000	00000


									3/8"	-0.005" to 0.005"	0000000	00000
									1/2"	-0.005" to 0.005"	0000000	00000
									3/4"	-0.005" to 0.005"	0000000	00000
									1"	-0.005" to 0.005"	0000000	00000


24" × 48"



									1/4"	-0.005" to 0.005"	0000000	00000


									3/8"	-0.005" to 0.005"	0000000	00000
									1/2"	-0.005" to 0.005"	0000000	00000
									3/4"	-0.005" to 0.005"	0000000	00000
									1"	-0.005" to 0.005"	0000000	00000


									48" × 48"



									1/4"	-0.005" to 0.005"	0000000	00000


									3/8"	-0.005" to 0.005"	0000000	00000
									1/2"	-0.005" to 0.005"	0000000	00000
									3/4"	-0.005" to 0.005"	0000000	00000
									1"	-0.005" to 0.005"	0000000	000000


									48" × 96"



									1/4"	-0.005" to 0.005"	0000000	00000


									3/8"	-0.005" to 0.005"	0000000	000000
									1/2"	-0.005" to 0.005"	0000000	000000
									3/4"	-0.005" to 0.005"	0000000	000000
									1"	-0.005" to 0.005"	0000000	000000

Basswood Strips

Also known as linden, this basswood is moldable and lightweight, making it ideal for shipping boxes, crates, handles, and building models. It is one of the softest hardwoods and is easy to machine. Basswood won’t warp when exposed to humidity and temperature changes. While slightly heavier than balsa wood, these strips bend and curve more easily and are more durable.

Thk.	Lg.	1/2" Wide	2" Wide	4" Wide
1/16"	24"	00000	00000	00000
1/8"	24"	0000	0000	0000
1/4"	24"	0000	0000	00000
3/8"	24"	0000	0000	—

Balsa Wood Cores

Lighter in weight than any other wood, yet still strong, these balsa cores stiffen composite sandwiches without weighing them down. They resist damage from impact and repeated use. Because they don’t let heat or sound pass through quickly, these cores are good natural insulators. They also resist chemicals. All come from balsa trees grown in FSC (Forest Stewardship Council) certified forests.

Rigid

Rigid cores are often used in panels for partitions, industrial tanks, and other stiff structures.

Cannot Be Sold to Canada—They cannot be sold to Canada due to import regulations.

Thk.	Wd.	Lg.	Compressive Strength, psi	Temp. Range, ° F	Cannot Be Sold To	Each
1/4"	24"	48"	1,500	-100 to 325	Canada	000000
3/8"	24"	48"	1,500	-100 to 325	Canada	00000
1/2"	24"	48"	1,500	-100 to 325	Canada	00000
5/8"	24"	48"	1,500	-100 to 325	Canada	00000
3/4"	24"	48"	1,500	-100 to 325	Canada	00000
1"	24"	48"	1,500	-100 to 325	Canada	00000
2"	24"	48"	1,500	-100 to 325	Canada	00000

Flexible with Fiberglass Fabric Reinforcement

Image of Product. Front orientation. Wood. Balsa Wood Cores, Flexible.

Flexible cores are best for forming complex shapes.

Cannot Be Sold to Canada—They cannot be sold to Canada due to import regulations.

Thk.	Wd.	Lg.	Compressive Strength, psi	Temp. Range, ° F	Cannot Be Sold To	Each
1/4"	24"	48"	1,500	-100 to 325	Canada	000000
3/8"	24"	48"	1,500	-100 to 325	Canada	00000
1/2"	24"	48"	1,500	-100 to 325	Canada	00000
3/4"	24"	48"	1,500	-100 to 325	Canada	00000
1"	24"	48"	1,500	-100 to 325	Canada	00000

Balsa Wood Strips

Made of balsa, the lightest and softest of all wood.

Cannot Be Sold to Canada—These strips cannot be sold to Canada due to import regulations.

Thk.	Wd.	Lg.	Cannot Be Sold To		Each
1/8"	1/2"	36"	Canada	00000000	00000
1/8"	1"	36"	Canada	00000000	0000
1/8"	4"	24"	Canada	00000000	0000
1/8"	4"	36"	Canada	0000000	00000
1/8"	6"	36"	Canada	0000000	00000
3/16"	1/2"	36"	Canada	00000000	0000
3/16"	1"	36"	Canada	00000000	0000
3/16"	4"	24"	Canada	00000000	00000
3/16"	4"	36"	Canada	00000000	00000
3/16"	6"	36"	Canada	0000000	00000
1/4"	1/2"	36"	Canada	00000000	0000
1/4"	1"	36"	Canada	00000000	0000
1/4"	4"	24"	Canada	00000000	00000
1/4"	4"	36"	Canada	0000000	00000
1/4"	6"	36"	Canada	0000000	00000
1/2"	1/2"	36"	Canada	00000000	0000
1/2"	1"	36"	Canada	00000000	0000
1/2"	4"	24"	Canada	00000000	00000
1/2"	4"	36"	Canada	0000000	00000
1/2"	6"	36"	Canada	00000000	00000
1"	3"	6"	Canada	00000000	0000
1"	4"	36"	Canada	0000000	00000
2"	3"	6"	Canada	00000000	0000
2"	3"	36"	Canada	0000000	00000
3"	3"	6"	Canada	0000000	00000

Synthetic Wood

Get the look of wood without having to worry about splintering or rotting. This UV-resistant synthetic wood can be used in direct sunlight and high-traffic applications, such as marine decking.

						6 ft. Long		12 ft. Long
	Thk.	Thk. Tolerance	Wd.	Color	Max. Temp., ° F		Each		Each
HDPE Synthetic Wood



		1/2"	-0.100" to 0.100"	8"	Brown	120	0000000	000000	———	0


		3/4"	-0.100" to 0.100"	5 1/2"	Brown	120	0000000	00000	00000000	000000
		3/4"	-0.100" to 0.100"	5 1/2"	White	120	00000000	00000	———	0
		7/8"	-0.100" to 0.100"	2 1/8"	Brown	120	0000000	00000	———	0
		1 1/2"	-0.100" to 0.100"	3 1/2"	Brown	120	0000000	00000	00000000	00000
		1 1/2"	-0.100" to 0.100"	3 1/2"	White	120	00000000	00000	———	0
		1 1/2"	-0.100" to 0.100"	5 1/2"	Brown	120	0000000	00000	0000000	000000
		1 1/2"	-0.100" to 0.100"	5 1/2"	Light Gray	120	00000000	00000	———	0
		1 1/2"	-0.100" to 0.100"	7 1/2"	Brown	120	0000000	00000	———	0
		1 1/2"	-0.100" to 0.100"	9 1/2"	Brown	120	00000000	000000	00000000	000000
		1 1/2"	-0.100" to 0.100"	9 1/2"	White	120	00000000	000000	———	0

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage. These filler plates snap into panel openings. They also have an adhesive strip, so they don’t move when you take the panel cover off.

For Panel Cutout Wd.	For Manufacturer (Series)	Mount Type	Ht.	Wd.	Dp.	Material	Flammability Rating		Each
3/4"	Square D (QO) Square D (QOB)	Snap In, Adhesive	3/8"	11/16"	2 9/16"	Plastic	UL 94 V-2	0000000	00000
1"	Bryant Challenger Crouse-Hinds Cutler-Hammer (BR) General Electric Murray Siemens Square D (Homeline) Thomas & Betts Westinghouse	Snap In, Adhesive	3/8"	1"	2 9/16"	Plastic	UL 94 V-2	0000000	0000

Wood Boards

Don’t knock the classics—these wood boards are a strong and affordable building material. Made of spruce, pine, or fir, they’re less dense and easier to drill and saw than hardwood, but still sturdy enough to make into crates and other load-bearing structures. Any knots are tight and spaced apart.

No. 1 Premium Softwood—No. 1 premium boards are the best grade available. They have minimal defects, so they’re good for applications where the appearance of the wood is important.

	Thk.	Thk. Tolerance	Wd.	Fabrication		12" Long	24" Long	36" Long	48" Long	60" Long	72" Long	96" Long
No. 2 Premium SPF Softwood



	1 × 4	3/4"	-0.125" to 0.125"	3 1/2"	Heat Treated	00000000	00000	00000	00000	00000	00000	00000	00000


	2 × 4	1 1/2"	-0.125" to 0.125"	3 1/2"	Heat Treated	00000000	0000	0000	0000	0000	0000	0000	0000
	2 × 6	1 1/2"	-0.125" to 0.125"	5 1/2"	Heat Treated	00000000	0000	0000	0000	0000	0000	00000	00000


	No. 1 Premium White Fir



			2 × 4	1 1/2"	-0.125" to 0.125"	3 1/2"	Heat Treated	000000	0000	0000	0000	0000	0000	00000	00000