4" Plastic Sheets | McMaster-Carr

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54 Products

About Plastic

Compare over 25 types of plastic to find the right material for you.

Clear Machinable Cast Acrylic Sheets

These cast acrylic sheets are often fabricated into tanks, see-through barrier panels, and light fixture lenses. Cast acrylic, which is comparable to Lucite and Plexiglas® acrylic, is easier to machine than extruded acrylic. The material is scratch resistant and stands up to outdoor use better than polycarbonate. It maintains clarity over time and won't weaken from exposure to UV, though the pigment in colored acrylic will fade over time when exposed to direct sunlight.

	Lg.	Thk. Tolerance	Fabrication	Temp., ° F	Food Industry Std.	Color		Each
4" Thick



	6"	6"	-0.268" to 0.142"	Cast	-40 to 170	FDA Standard	Clear	8560K932	0000000


	6"	12"	-0.268" to 0.142"	Cast	-40 to 170	FDA Standard	Clear	8560K956	000000
	12"	12"	-0.268" to 0.142"	Cast	-40 to 170	FDA Standard	Clear	8560K925	000000
	12"	24"	-0.268" to 0.142"	Cast	-40 to 170	FDA Standard	Clear	8560K944	000000
	12"	36"	-0.268" to 0.142"	Cast	-40 to 170	FDA Standard	Clear	8560K945	00000000

Ultra-Low-Friction UHMW Polyethylene Sheets

In addition to having a low-friction surface that prevents sticking and binding, this tough, impact- and wear-resistant material handles the scuffs, scrapes, and strikes that other plastic can’t. These sheets are often used to make machine guards and chute liners. They are all FDA compliant for direct food contact.

If you don't see the size of white sheet you're looking for, check out our Made-to-Order UHMW Polyethylene Sheets.

	Min. Temp., ° F	Max. Temp., ° F	Flammability Rating	Food Industry Std.		Each
Black







	4" Thick

	6"	6"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A174	000000


	6"	12"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A189	000000
	12"	12"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A219	000000
	12"	24"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A319	000000
	12"	36"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A624	000000
	24"	24"	Extruded	-40	180	UL 94 HB	FDA Standard	4296A569	000000


	White







					4" Thick

					6"	6"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K972	00000


					6"	12"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K856	000000
					12"	12"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K973	000000
					12"	24"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K235	000000
					12"	36"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K335	000000
					24"	24"	Extruded	-40	180	UL 94 HB	FDA Standard	8752K435	000000

Ultra-Machinable Delrin® Acetal Sheets

These sheets resist expanding when exposed to heat and moisture, so they can be easily machined to close tolerances. They also have a naturally slippery, wear-resistant surface. Use them to make precision gears, bushings, and bearings. Delrin® acetal resin, also known as acetal homopolymer, is stronger and stiffer than acetal copolymer.

					Black		White
	Wd.	Lg.	Fabrication	Temp., ° F		Each	Food Industry Std.		Each
4" Thick



		6"	6"	Extruded	-20 to 180	8575K159	0000000	FDA Standard, NSF Standard	8573K139	0000000


		12"	12"	Extruded	-20 to 180	8575K716	000000	FDA Standard, NSF Standard	8573K115	000000
		12"	24"	Extruded	-20 to 180	8575K726	000000	FDA Standard, NSF Standard	8573K252	000000
		12"	48"	Extruded	-20 to 180	8575K183	00000000	FDA Standard, NSF Standard	8573K325	00000000
		24"	24"	Extruded	-20 to 180	8575K746	00000000	FDA Standard, NSF Standard	8573K178	00000000
		24"	48"	Extruded	-20 to 180	8575K225	00000000	FDA Standard, NSF Standard	8573K191	00000000

Ultra-Machinable Acetal Sheets

An economical alternative to Delrin® acetal resin, these acetal copolymer sheets offer the same naturally slippery surface and similar wear resistance. They resist expanding when exposed to heat and moisture, so they can be machined to close tolerances. Use them for parts that require precision, such as gears, bearings, and bushings.

						Black		White
	Wd.	Lg.	Fabrication	Temp., ° F	Food Industry Std.		Each		Each
4" Thick



		6"	6"	Extruded	-20 to 180	FDA Standard	8492K969	0000000	8492K967	0000000


		12"	12"	Extruded	-20 to 180	FDA Standard	8492K663	000000	8492K66	000000
		12"	24"	Extruded	-20 to 180	FDA Standard	8492K763	000000	8492K76	000000
		12"	48"	Extruded	-20 to 180	FDA Standard	8492K365	00000000	8492K366	00000000
		24"	24"	Extruded	-20 to 180	FDA Standard	8492K853	00000000	8492K86	00000000

Highly Moisture-Resistant HDPE Sheets

Practically nonabsorbent, these sheets won't swell when exposed to water. They’re harder and denser than LDPE, plus they’re more chemical resistant. They are often machined into plugs, seals, and containers.

If you don't see the size you're looking for, check out our Made-to-Order HDPE Sheets.

	Lg.	Fabrication	Min. Temp.	Max. Temp., ° F	Color	Flammability Rating	Food Industry Std.		Each
4" Thick



	6"	6"	Molded	Not Rated	180	Semi-Clear White	UL 94 HB	FDA Standard	8619K618	0000000


	6"	12"	Molded	Not Rated	180	Semi-Clear White	UL 94 HB	FDA Standard	8619K892	000000
	12"	12"	Molded	Not Rated	180	Semi-Clear White	UL 94 HB	FDA Standard	8619K551	000000
	12"	24"	Molded	Not Rated	180	Semi-Clear White	UL 94 HB	FDA Standard	8619K552	000000
	12"	48"	Molded	Not Rated	180	Semi-Clear White	UL 94 HB	FDA Standard	8619K553	000000

Ultra-Low-Friction UHMW Polyethylene Bars

In addition to having a low-friction surface that prevents sticking and binding, this tough, impact- and wear-resistant material handles the scuffs, scrapes, and strikes that other plastic can’t. These bars are often used to make machine guards and chute liners. They are all FDA compliant for direct food contact.

Black

Image of Product. Front orientation. Plastic. Ultra-Low-Friction UHMW Polyethylene Bars.

	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Flammability Rating	Food Industry Std.	Choose a Length, ft.		Per Ft.
4" Thick



	4"	Extruded	-20	180	UL 94 HB	FDA Standard	1, 2, 3, 4, 5	8702K642	0000000

White

	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Flammability Rating	Food Industry Std.	Choose a Length, ft.		Per Ft.
4" Thick



	4"	Extruded	-20	180	UL 94 HB	FDA Standard	1, 2, 3, 4, 5	8702K945	000000

Ultra-Machinable Delrin® Acetal Bars

These bars resist expanding when exposed to heat and moisture, so they can be easily machined to close tolerances. They also have a naturally slippery, wear-resistant surface. Use them to make precision gears, bushings, and bearings. Delrin® acetal resin, also known as acetal homopolymer, is stronger and stiffer than acetal copolymer.

					Black		White
	Wd.	Fabrication	Temp., ° F	Choose a Length, ft.		Per Ft.	Food Industry Std.		Per Ft.
Oversized Tolerance (0" to 0.025")







				4" Thick

				4"	Extruded	-20 to 180	1, 2, 3, 4	8663K29	0000000	FDA Standard	8741K55	0000000

Machinable Cast Nylon Sheets

In addition to being easier to machine than standard nylon 6/6, these cast nylon 6 sheets are also better electrical insulators. They have a wear-resistant, slippery surface that reduces friction. Use them to make gears, sprockets, and wear strips. This material is comparable to Nylatron and Nycast.

							Off-White
	Wd.	Lg.	Thk. Tolerance	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Flammability Rating	Food Industry Std.		Each
4" Thick



		6"	6"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K117	000000


		12"	12"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K56	000000
		12"	24"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K57	000000
		12"	48"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K58	00000000
		24"	24"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K77	00000000
		24"	48"	0" to 0.025"	Cast	-20	200	UL 94 HB	FDA Standard	85055K59	00000000