Thermostat Knobs | McMaster-Carr

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89 Products

Indicating Knobs


Style 1—Ribbed Grip	Style 2—Ribbed Grip	Style 3—Ribbed Grip	Style 4—Ribbed Grip

Style 5—Knurled-Head Grip	Style 6—Ribbed Grip	Style 7—Ribbed Grip	Style 8—Single-Arm Grip

Style 9—Single-Arm Grip	Style 10—Single-Arm Grip	Style 11—Ribbed Grip	Style 12—Two-Arm Grip

Style 13—Single-Arm Grip	Style 14—Two-Arm Grip	Style 15—Single-Arm Grip	Style 16—Single-Arm Grip

Control devices with round or D-shaped shafts and view settings at a glance with a pointer.

Phenolic—Phenolic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Phenolic has good scratch resistance.

ABS—ABS knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. ABS has excellent impact resistance.

Anodized Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.

For D-Profile Shafts—Knobs for D-profile shafts simply press on and stay in place.

For Round Shafts—Knobs for round shafts include a set screw to secure them in place.

	Head			Hole
	Dia.	Wd.	Ht.	Dia.	Dp.	Cap Color	Insert Material	Set Screw Included	Temp. Range, ° F	Features		Each
Style 1—Ribbed Grip







				Black Phenolic—For D-Profile Shafts

				3/4"	—	1/2"	1/4"	7/16"	—	—	No	-30 to 400	Retaining Spring	0000000	00000


				1 1/8"	—	5/8"	1/4"	1/2"	—	—	No	-30 to 400	Retaining Spring	0000000	0000
				1 1/4"	—	3/4"	1/4"	5/8"	—	—	No	-30 to 400	Retaining Spring	0000000	0000
				1 1/2"	—	11/16"	1/4"	1/2"	—	—	No	-30 to 400	Retaining Spring	0000000	0000




						Black Phenolic—For Round Shafts

						3/4"	—	1/2"	1/4"	7/16"	—	—	Yes	-30 to 400	—	0000000	0000


						1 1/8"	—	5/8"	1/4"	1/2"	—	—	Yes	-30 to 400	—	0000000	0000
						1 1/2"	—	11/16"	1/4"	1/2"	—	Brass	Yes	-30 to 400	—	0000000	0000


						Style 2—Ribbed Grip







										Black Phenolic—For D-Profile Shafts

										1 1/2"	—	7/8"	1/4"	3/4"	Silver	—	No	-30 to 400	Retaining Spring	0000000	0000


										2 1/16"	—	7/8"	1/4"	13/16"	Silver	—	No	-30 to 400	—	0000000	0000




												Black Phenolic—For Round Shafts

												3/4"	—	1/2"	1/4"	7/16"	Silver	—	Yes	-30 to 400	—	0000000	0000


												3/4"	—	1/2"	1/4"	7/16"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												13/16"	—	1/2"	1/4"	7/16"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												1"	—	9/16"	1/4"	1/2"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												1 1/8"	—	5/8"	1/4"	1/2"	Silver	—	Yes	-30 to 400	—	0000000	0000
												1 5/16"	—	11/16"	1/4"	1/2"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												1 1/2"	—	7/8"	1/4"	3/4"	Silver	—	Yes	-30 to 400	—	0000000	0000
												1 1/2"	—	7/8"	1/4"	3/4"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												1 3/4"	—	13/16"	1/4"	11/16"	Silver	Brass	Yes	-30 to 400	—	0000000	0000
												2 1/16"	—	7/8"	1/4"	13/16"	Silver	—	Yes	-30 to 400	—	0000000	0000
												2 1/16"	—	7/8"	1/4"	13/16"	Silver	Brass	Yes	-30 to 400	—	0000000	0000


												Style 3—Ribbed Grip







												Black Phenolic—For Round Shafts

												1/2"	—	5/8"	1/4"	1/2"	—	—	Yes	-30 to 400	—	0000000	0000


												5/8"	—	9/16"	1/4"	7/16"	—	Brass	Yes	-30 to 400	—	0000000	0000
												13/16"	—	5/8"	1/4"	1/2"	—	Brass	Yes	-30 to 400	—	0000000	0000
												15/16"	—	13/16"	1/4"	5/8"	—	Brass	Yes	-30 to 400	—	0000000	0000
												1 3/8"	—	11/16"	1/4"	5/8"	—	Brass	Yes	-30 to 400	—	0000000	0000


				Style 4—Ribbed Grip







														Black Phenolic—For Round Shafts

														9/16"	—	5/8"	1/4"	7/16"	Silver	—	Yes	-30 to 400	—	0000000	0000


						13/16"	—							5/8"	1/4"	9/16"	Silver	—	Yes	-30 to 400	—	0000000	0000
						1 1/16"	—							11/16"	1/4"	9/16"	Silver	—	Yes	-30 to 400	—	0000000	0000


						Style 5—Knurled-Head Grip







														Anodized Aluminum—For Round Shafts

														1/2"	—	5/8"	1/8"	1/2"	—	—	Yes	—	—	0000000	00000


										1/2"	—			5/8"	1/4"	1/2"	—	—	Yes	—	—	0000000	00000
										15/16"	—			5/8"	1/4"	1/2"	—	—	Yes	—	—	0000000	00000


										Style 6—Ribbed Grip







																Anodized Aluminum—For Round Shafts

																1/2"	—	5/8"	1/8"	1/2"	—	—	Yes	—	—	0000000	00000


1/2"	—															5/8"	1/4"	1/2"	—	—	Yes	—	—	0000000	00000
15/16"	—															5/8"	1/4"	1/2"	—	—	Yes	—	—	0000000	00000


Style 7—Ribbed Grip







																Black ABS—For Round Shafts

																3/4"	—	11/16"	9/16"	1/2"	—	—	Yes	-15 to 200	—	0000000	0000


																3/4"	—	3/4"	9/16"	1/2"	—	—	Yes	-15 to 200	—	0000000	0000
																15/16"	—	3/4"	3/4"	1/2"	—	—	Yes	-15 to 200	—	0000000	0000
				15/16"												—	13/16"	3/4"	1/2"	—	—	Yes	-15 to 200	—	0000000	0000


				Style 8—Single-Arm Grip







																Black Anodized Aluminum—For Round Shafts

																1/2"	—	1"	1/8"	1/2"	—	—	Yes	—	—	000000	00000


																Style 9—Single-Arm Grip







									Black Phenolic—For D-Profile Shafts

									1 1/2"								—	3/4"	1/4"	5/8"	—	—	No	-30 to 400	Retaining Spring	0000000	0000




																		Black Phenolic—For Round Shafts

																		3/4"	—	9/16"	1/4"	7/16"	—	—	Yes	-30 to 400	—	0000000	0000


										1 1/8"								—	5/8"	1/4"	7/16"	—	—	Yes	-30 to 400	—	0000000	0000
										1 1/2"	—							3/4"	1/4"	5/8"	—	—	Yes	-30 to 400	—	0000000	0000
										1 1/2"	—							3/4"	1/4"	5/8"	—	Brass	Yes	-30 to 400	—	0000000	0000


										Style 10—Single-Arm Grip







																		Black Phenolic—For Round Shafts

—	1 1/8"																	1/2"	1/4"	7/16"	—	Brass	Yes	-30 to 400	—	0000000	0000


Style 11—Ribbed Grip







																		Black Phenolic—For Round Shafts

																		—	1 1/4"	5/8"	1/4"	1/2"	—	Brass	Yes	-30 to 400	—	0000000	0000


																		—	1 1/4"	5/8"	1/4"	1/2"	Silver	—	Yes	-30 to 400	—	0000000	0000


				Style 12—Two-Arm Grip







													Black Phenolic—For Round Shafts

													—						1 5/16"	5/8"	1/4"	9/16"	Silver	—	Yes	-30 to 400	—	0000000	0000


													Style 13—Single-Arm Grip







																Black Phenolic—For D-Profile Shafts

																—			1 1/16"	5/8"	1/4"	1/2"	Silver	—	No	-30 to 400	Retaining Spring	0000000	0000




																	Black Phenolic—For Round Shafts

																	—		1 1/16"	5/8"	1/4"	1/2"	Silver	—	Yes	-30 to 400	—	0000000	0000


																	Style 14—Two-Arm Grip







																				Black Phenolic—For D-Profile Shafts

																				—	2"	5/8"	1/4"	1/2"	—	—	No	-30 to 400	—	0000000	0000




																				Black Phenolic—For Round Shafts

—	1 1/4"																			5/8"	1/4"	1/2"	—	—	Yes	-30 to 400	—	0000000	0000


—	1 1/4"																			5/8"	1/4"	1/2"	—	Brass	Yes	-30 to 400	—	0000000	0000
—	2"	5/8"																		1/4"	1/2"	—	—	Yes	-30 to 400	—	0000000	0000


Style 15—Single-Arm Grip







																				Black Phenolic—For Round Shafts

				—	1 11/16"															5/8"	1/4"	9/16"	—	—	Yes	-30 to 400	—	0000000	0000


				—	1 11/16"															5/8"	1/4"	9/16"	—	Brass	Yes	-30 to 400	—	0000000	0000


				Style 16—Single-Arm Grip







													Black Phenolic—For Round Shafts

													—					2 1/2"		5/8"	1/4"	5/16"	—	Brass	Yes	-30 to 400	—	0000000	0000

Screw-Head Mount Precise-Control Indicating Knobs

Knurled-Head

Grip

Six-Arm

Grip

To build a custom precise-control knob or thumb screw, pair one of these knobs with a socket head screw. Press the knob and screw together using a bench vise or an arbor press. Then, turn the knob to move the screw 0.005" per graduation and make precise adjustments. Made of acetal, these knobs resist oil, grease, and solvents.

		Head
	For Thread Size	Dia.	Ht.	For Screw Head Type	Temp. Range, ° F		Each
Knurled-Head Grip







				Black Acetal

				1/4"-20	1"	5/16"	Socket	35 to 180	000000000	00000


				Six-Arm Grip







								Black Acetal

								1/4"-20	1 1/2"	1/2"	Socket	35 to 180	000000000	0000

Comfort-Grip Indicating Knobs

Style 1—Ribbed

Grip

Style 2—Ribbed

Grip

Style

3—Ribbed

Grip

Style

4—Single-Arm

Grip

Style 5—Smooth

Grip

A rubber coating or construction provides a comfortable grip. Use these knobs to control devices with round or D-shaped shafts and view settings at a glance with a pointer. All resist oil, grease, and solvents.

TPE Rubber—TPE knobs have more abrasion resistance than polypropylene knobs.

For D-Profile Shafts—Knobs for D-profile shafts simply press on and stay in place.

For Round Shafts—Knobs for round shafts include a set screw to secure them in place.

	Head		Hole					Each
	Dia.	Ht.	Dia.	Dp.	Set Screw Included	Temp. Range, ° F		1-9	10-Up
Style 1—Ribbed Grip







				Black Rubber-Coated Polypropylene—For Round Shafts

				5/8"	9/16"	1/4"	1/2"	Yes	-15 to 210	00000000	00000	00000


				3/4"	3/8"	1/4"	5/16"	Yes	-15 to 210	00000000	0000	0000
				3/4"	11/16"	1/4"	5/8"	Yes	-15 to 210	00000000	0000	0000


				Style 2—Ribbed Grip







								Black Rubber-Coated Polypropylene—For Round Shafts

								1/2"	11/16"	1/8"	5/8"	Yes	-15 to 210	00000000	0000	0000


								1 1/8"	9/16"	1/4"	7/16"	Yes	-15 to 210	00000000	0000	0000
								1 1/2"	5/8"	1/4"	1/2"	Yes	-15 to 210	00000000	0000	0000




										Black TPE—For D-Profile Shafts

										11 mm	14 mm	6 mm	11 mm	No	-20 to 120	0000000	0000	0000


										15 mm	22 mm	6 mm	15 mm	No	-20 to 120	0000000	0000	0000
										20 mm	18 mm	6 mm	15 mm	No	-20 to 120	0000000	0000	0000


										Style 3—Ribbed Grip







														Black Rubber-Coated Polypropylene—For Round Shafts

														5/8"	13/16"	1/8"	3/4"	Yes	-15 to 210	00000000	0000	0000


														1 1/4"	5/8"	1/4"	9/16"	Yes	-15 to 210	00000000	0000	0000
														1 11/16"	3/4"	1/4"	5/8"	Yes	-15 to 210	00000000	0000	0000




																Black TPE—For D-Profile Shafts

15 mm	22 mm															6 mm	15 mm	No	-20 to 120	0000000	0000	0000


20 mm	18 mm															6 mm	15 mm	No	-20 to 120	0000000	0000	0000


Style 4—Single-Arm Grip







																Black Rubber-Coated Polypropylene—For Round Shafts

																1 3/8"	7/8"	1/4"	11/16"	Yes	-15 to 210	00000000	0000	0000


				1 7/8"	1"											1/4"	7/8"	Yes	-15 to 210	00000000	0000	0000


				Style 5—Smooth Grip







																Black Rubber-Coated Polypropylene—For Round Shafts

																1 1/2"	11/16"	1/4"	7/16"	Yes	-15 to 210	0000000	0000	0000


								2"	11/16"							1/4"	7/16"	Yes	-15 to 210	0000000	0000	0000
								2 1/2"	11/16"							1/4"	7/16"	Yes	-15 to 210	0000000	0000	0000

Turn-Counting Indicating Knobs


Style 1—Ribbed Grip	Style 2—Ribbed Grip	Style 3—Ribbed Grip	Style 4—Ribbed Grip

For monitoring the number of shaft turns on instrumentation, these knobs have easy-to-read scales or digits for quick and accurate readings. Use them on devices with round shafts. To secure these knobs in place, tighten the set screw.

Plastic—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents.

Aluminum—Aluminum knobs have mild corrosion resistance, are lightweight, and are nonmagnetic.

	Head			Housing			Hole
	Dia.	Ht.	Max. Knob Turns	Wd.	Material	Ht.	Dia.	Dp.	Set Screw Included	Temp. Range, ° F		Each
Style 1—Ribbed Grip







				Black Aluminum—For Round Shafts

				1"	1"	10	—	—	—	1/4"	13/16"	Yes	35 to 400	0000000	000000


				Style 2—Ribbed Grip







								Black Plastic—For Round Shafts

								1 1/16"	1 1/4"	10	—	—	—	1/4"	11/16"	Yes	-20 to 185	0000000	000000


								Style 3—Ribbed Grip







												Black Plastic—For Round Shafts

												9/16"	1"	10	1"	Aluminum	1 3/4"	1/4"	1"	Yes	-20 to 185	0000000	000000


												Style 4—Ribbed Grip







																Black Plastic—For Round Shafts

																7/8"	7/8"	15	—	—	—	1/8"	13/16"	Yes	—	000000	00000


																7/8"	15/16"	15	—	—	—	1/4"	13/16"	Yes	—	0000000	00000
																1 13/16"	1"	20	—	—	—	1/4"	15/16"	Yes	—	0000000	00000

Dual-Control Comfort-Grip Indicating Knobs

These dual-control knobs operate independently to control two settings. They have a rubber coating for a comfortable grip. Use them on devices with round shafts to view settings at a glance with a pointer. To secure these knobs in place, tighten the set screw. Made of polypropylene, all resist oil, grease, and solvents.

For Round Shafts—Knobs for round shafts include a set screw to secure them in place.

	Head		Hole					Each
	Dia.	Ht.	Dia.	Dp.	Set Screw Included	Temp. Range, ° F		1-9	10-Up
Ribbed Grip







				Black Rubber-Coated Polypropylene—For Round Shafts

				5/8"	1 1/8"	1/8", 1/4"	1"	Yes	-15 to 200	0000000	000000	00000

Choose-a-Color Indicating Knobs

Image of Product. Front orientation. Indicating Knobs. Choose-a-Color.

Quickly identify equipment controls and components by their color. Use these knobs to control devices with round shafts and view settings at a glance with a pointer. Create custom threads or drill a hole in the side of the head to secure with a set screw. Made of TPE, all of these knobs have good abrasion resistance. They resist oil, grease, and solvents.

	Head		Hole					Each
	Dia.	Ht.	Dia.	Dp.	Temp. Range, ° F	Choose a Color		1-9	10-Up
Ribbed Grip







				TPE—For Round Shafts

				13/16"	11/16"	1/4"	5/8"	-20 to 250	Orange , Red , Yellow	0000000	00000	00000


				11 mm	14 mm	6 mm	11 mm	-20 to 250	Orange , Red , Yellow	0000000	0000	0000

Threaded-Stud Precise-Control Indicating Knobs

Knurled-Head Grip

Six-Arm Grip

Mount these knobs into a threaded hole. Turn the knob to move the stud 0.005" per graduation and make precise adjustments. Secure with the included locknut. Made of acetal, these knobs resist oil, grease, and solvents.

		Head		Stud
	Thread Size	Dia.	Ht.	Lg.	Material	Temp. Range, ° F	Features		Each
Knurled-Head Grip







				Black Acetal

				1/4"-20	1"	5/16"	2"	Steel	35 to 180	Locknut	000000000	00000


				Six-Arm Grip







								Black Acetal

								1/4"-20	1 1/2"	1/2"	3"	Steel	35 to 180	Locknut	000000000	0000