Ceramic Posts | McMaster-Carr

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Threaded on Both Ends

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EAR99

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Electrically Insulating

High Temperature

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Unified Standard Class 1B

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Mohs 7.5

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39 Products

Electrical-Insulating Female Threaded Standoffs

Our best electrically insulating standoffs. They prevent electrical currents from passing through enclosures and conductive surfaces. These standoffs are often installed in circuit-breaker housings and semiconductors.

Round


	Fully Threaded	Threaded on Both Ends

High-Temperature Grade L5 Ceramic—Our most heat-resistant standoffs, even at blistering temperatures up to 1700° F. However, ceramic is brittle and can crack under mechanical stress.

	Lg.	OD	Thread Lg.	Min. Thread Lg.	Dielectric Strength, V/mil	Voltage Rating	Temp. Range, ° F		Each
High-Temperature Grade L5 Ceramic







			6-32

			1/4"	1/4"	Fully Threaded	1/4"	—	275	Not Rated	50 to 1,700	000000000	00000


			3/8"	3/8"	Threaded on Both Ends	—	1/8"	275	Not Rated	50 to 1,700	000000000	0000
			1/2"	1/4"	Threaded on Both Ends	—	3/16"	275	Not Rated	50 to 1,700	000000000	0000
			1/2"	3/8"	Threaded on Both Ends	—	1/8"	275	Not Rated	50 to 1,700	000000000	0000
			1/2"	1/2"	Threaded on Both Ends	—	5/32"	275	Not Rated	50 to 1,700	000000000	0000
			3/4"	1/4"	Threaded on Both Ends	—	1/4"	275	Not Rated	50 to 1,700	000000000	0000
			3/4"	3/8"	Threaded on Both Ends	—	1/4"	275	Not Rated	50 to 1,700	000000000	0000
			3/4"	1/2"	Threaded on Both Ends	—	1/4"	275	Not Rated	50 to 1,700	000000000	0000
			1"	1/4"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
			1"	3/8"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
			1"	1/2"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000


			1 1/4"	1/4"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
			1 1/2"	1/4"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
			1 1/2"	3/8"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
			1 1/2"	1/2"	Threaded on Both Ends	—	9/16"	275	Not Rated	50 to 1,700	000000000	0000
			2"	1/2"	Threaded on Both Ends	—	1/2"	275	Not Rated	50 to 1,700	000000000	0000
			2 1/2"	1/2"	Threaded on Both Ends	—	1/2"	275	Not Rated	50 to 1,700	000000000	0000
			3"	1/2"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	00000




					8-32

					1/2"	3/8"	Threaded on Both Ends	—	5/32"	275	Not Rated	50 to 1,700	000000000	0000


					3/4"	3/8"	Threaded on Both Ends	—	3/16"	275	Not Rated	50 to 1,700	000000000	0000
					1"	3/8"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
					1 1/2"	3/8"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000




							1/4"-20

							1"	3/4"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000


							1"	1"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	00000
							1 1/2"	3/4"	Threaded on Both Ends	—	3/8"	275	Not Rated	50 to 1,700	000000000	0000
							1 1/2"	1"	Threaded on Both Ends	—	1/2"	275	Not Rated	50 to 1,700	000000000	00000
							1 1/2"	1 1/4"	Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
							2"	3/4"	Threaded on Both Ends	—	3/4"	275	Not Rated	50 to 1,700	000000000	0000
							2"	1"	Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
							2"	1 1/4"	Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
							2 1/2"	3/4"	Threaded on Both Ends	—	3/4"	275	Not Rated	50 to 1,700	000000000	00000
							3"	3/4"	Threaded on Both Ends	—	3/4"	275	Not Rated	50 to 1,700	000000000	00000
							3"	1"	Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000


3"							1 1/4"	Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
3 1/2"	3/4"						Threaded on Both Ends	—	3/4"	275	Not Rated	50 to 1,700	000000000	00000
4"	3/4"						Threaded on Both Ends	—	3/4"	275	Not Rated	50 to 1,700	000000000	00000
4"	1"						Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
4"	1 1/4"						Threaded on Both Ends	—	5/8"	275	Not Rated	50 to 1,700	000000000	00000
5"	1 1/4"	Threaded on Both Ends					—	5/8"	275	Not Rated	50 to 1,700	000000000	00000