Thru Knobs | McMaster-Carr

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236 Products

Threaded Through-Hole Knobs


Style 1	Style 2	Style 3	Style 4	Style 5

Style 6	Style 7	Style 8	Style 9	Style 10

Style 11	Style 12	Style 13	Style 14	Style 15

Long shafts can thread through these knobs for mounting versatility. The knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Style 1—Knurled-Head Grip

Style 1

Black-Oxide Steel—Black-oxide steel knobs are stronger than iron and have mild rust resistance.

303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

Brass—Brass knobs have good corrosion resistance and are nonmagnetic.

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

Steel—Steel knobs are stronger than iron.

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Black-Oxide Steel



		10-24	5/8"	3/4"	1/4"	1/2"	3/8"	6121K111	00000	00000


		1/4"-20	5/8"	3/4"	1/4"	1/2"	3/8"	6121K211	0000	0000
		1/4"-20	3/4"	1"	1/4"	5/8"	1/2"	6121K311	0000	0000
		1/4"-28	3/4"	1"	1/4"	5/8"	1/2"	6121K54	0000	0000
		5/16"-18	3/4"	1"	1/4"	5/8"	1/2"	6121K411	0000	0000
		5/16"-18	1"	1 1/2"	5/16"	3/4"	11/16"	6121K511	0000	0000
		5/16"-24	1"	1 1/2"	5/16"	3/4"	11/16"	6121K55	0000	0000
		3/8"-16	1"	1 1/2"	5/16"	3/4"	11/16"	6121K611	0000	0000
		3/8"-16	1 1/8"	2"	3/8"	1"	3/4"	6121K711	0000	0000
		3/8"-24	1 1/8"	2"	3/8"	1"	3/4"	6121K56	0000	0000
		1/2"-13	1 1/8"	2"	3/8"	1"	3/4"	6121K811	0000	0000


		1/2"-13	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	6121K911	00000	0000
		1/2"-20	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	6121K57	00000	00000
		5/8"-11	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	6121K112	00000	00000
		5/8"-11	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	6121K122	00000	00000
		3/4"-10	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	6121K132	00000	00000


		303 Stainless Steel



				10-24	5/8"	3/4"	1/4"	1/2"	3/8"	60205K211	0000	0000


				1/4"-20	5/8"	3/4"	1/4"	1/2"	3/8"	60205K221	0000	0000
				1/4"-20	3/4"	1"	1/4"	5/8"	1/2"	60205K231	0000	0000
				1/4"-28	3/4"	1"	1/4"	5/8"	1/2"	60205K81	0000	0000
				5/16"-18	3/4"	1"	1/4"	5/8"	1/2"	60205K241	0000	0000
				5/16"-18	1"	1 1/2"	5/16"	3/4"	11/16"	60205K251	00000	0000
				5/16"-24	1"	1 1/2"	5/16"	3/4"	11/16"	60205K82	00000	00000
				3/8"-16	1"	1 1/2"	5/16"	3/4"	11/16"	60205K261	00000	00000
				3/8"-16	1 1/8"	2"	3/8"	1"	3/4"	60205K271	00000	00000
				3/8"-24	1 1/8"	2"	3/8"	1"	3/4"	60205K83	00000	00000
				1/2"-13	1 1/8"	2"	3/8"	1"	3/4"	60205K281	00000	00000


				1/2"-13	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	60205K291	00000	00000
				1/2"-20	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	60205K84	00000	00000
				5/8"-11	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	60205K311	00000	00000
				5/8"-11	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	60205K321	00000	00000
				3/4"-10	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	60205K331	00000	00000
				M5 × 0.8 mm	16 mm	19 mm	6 mm	13 mm	10 mm	62265K513	0000	0000
				M6 × 1 mm	16 mm	19 mm	6 mm	13 mm	10 mm	62265K523	0000	0000
				M6 × 1 mm	19 mm	25 mm	6 mm	16 mm	13 mm	62265K533	0000	0000
				M8 × 1.25 mm	19 mm	25 mm	6 mm	16 mm	13 mm	62265K543	0000	0000
				M8 × 1.25 mm	25 mm	38 mm	8 mm	19 mm	17 mm	62265K553	00000	00000


				M10 × 1.5 mm	25 mm	38 mm	8 mm	19 mm	17 mm	62265K563	00000	00000
				M10 × 1.5 mm	29 mm	51 mm	10 mm	25 mm	19 mm	62265K573	00000	00000
				M12 × 1.75 mm	29 mm	51 mm	10 mm	25 mm	19 mm	62265K583	00000	00000


				Brass



1/4"-20	5/8"					3/4"	1/4"	1/2"	3/8"	5125K21	0000	0000


1/4"-20	3/4"					1"	1/4"	5/8"	1/2"	5125K22	0000	0000
5/16"-18	3/4"					1"	1/4"	5/8"	1/2"	5125K23	0000	0000
5/16"-18	1"					1 1/2"	5/16"	3/4"	11/16"	5125K24	00000	00000
3/8"-16	1"					1 1/2"	5/16"	3/4"	11/16"	5125K25	00000	00000
1/2"-13	1 1/8"					2"	3/8"	1"	3/4"	5125K26	00000	00000


Aluminum



						5/16"-18	13/16"	1"	3/8"	1/2"	7/16"	6077K31	0000	0000


						3/8"-16	1 1/8"	2"	9/16"	13/16"	9/16"	6077K32	00000	00000


						Steel



								M5 × 0.8 mm	16 mm	19 mm	6 mm	13 mm	10 mm	60765K313	0000	0000


		M6 × 1 mm	16 mm					19 mm	6 mm	13 mm	10 mm	60765K323	0000	0000
		M6 × 1 mm	19 mm					25 mm	6 mm	16 mm	13 mm	60765K333	0000	0000
		M8 × 1.25 mm	19 mm					25 mm	6 mm	16 mm	13 mm	60765K343	0000	0000
		M8 × 1.25 mm	25 mm					38 mm	8 mm	19 mm	17 mm	60765K353	0000	0000
		M10 × 1.5 mm	25 mm					38 mm	8 mm	19 mm	17 mm	60765K363	0000	0000
		M10 × 1.5 mm	29 mm					51 mm	10 mm	25 mm	19 mm	60765K373	0000	0000
		M12 × 1.75 mm	29 mm					51 mm	10 mm	25 mm	19 mm	60765K383	0000	0000

Style 2—Two-Arm Grip

Style 2

Nylon—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Nylon has good wear resistance.

	Thread		Head		Hub					Each
	Sz.	Dp.	Wd.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Nylon



		1/4"-20	3/8"	1 1/8"	9/16"	1/2"	1/8"	Brass	-15 to 150	6477K58	00000	00000

Style 3—Three-Arm Grip

Style 3

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

Polypropylene—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Polypropylene has good impact resistance.

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Phenolic



		10-32	3/8"	1 1/8"	1/2"	1/2"	1/4"	Brass	-30 to 400	57715K22	00000	00000


		1/4"-20	3/8"	1 1/8"	1/2"	1/2"	1/4"	Brass	-30 to 400	57715K23	0000	0000
		1/4"-20	3/8"	1 1/2"	5/8"	5/8"	1/8"	Brass	-30 to 400	57715K24	0000	0000
		5/16"-18	1/2"	1 1/2"	5/8"	5/8"	1/4"	Brass	-30 to 400	57715K25	0000	0000
		5/16"-18	1/2"	2"	5/8"	3/4"	3/8"	Brass	-30 to 400	57715K26	0000	0000
		3/8"-16	1/2"	2"	5/8"	3/4"	3/8"	Brass	-30 to 400	57715K27	0000	0000


		Black Polypropylene



				1/4"-20	1/2"	1 1/2"	5/8"	5/8"	1/4"	Brass	-15 to 125	57715K75	0000	0000


				5/16"-18	1/2"	1 1/2"	5/8"	5/8"	1/4"	Brass	-15 to 125	57715K74	0000	0000
				3/8"-16	1/2"	1 1/2"	5/8"	5/8"	1/4"	Brass	-15 to 125	57715K76	0000	0000

Style 4—Four-Arm Grip

Style 4

Black-Oxide Steel—Black-oxide steel knobs are stronger than iron and have mild rust resistance.

Brass—Brass knobs have good corrosion resistance and are nonmagnetic.

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

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Black-Oxide Steel



		1/4"-20	7/8"	1 1/2"	3/8"	5/8"	1/2"	3992T29	00000	00000


		5/16"-18	1"	2"	1/2"	13/16"	1/2"	3992T31	00000	00000
		3/8"-16	1 1/8"	2 1/2"	9/16"	1"	9/16"	3992T32	00000	00000
		1/2"-13	1 1/8"	2 1/2"	9/16"	1"	9/16"	3992T33	00000	00000


		Brass



				1/4"-20	7/8"	1"	3/8"	1/2"	1/2"	5125K46	00000	0000


				5/16"-18	3/4"	1 1/2"	3/8"	5/8"	3/8"	5125K47	00000	00000
				3/8"-16	1"	2"	1/2"	13/16"	1/2"	5125K48	00000	00000
				1/2"-13	1 1/8"	2 1/2"	9/16"	1"	9/16"	5125K49	00000	00000


				Aluminum



						1/4"-20	7/8"	1"	3/8"	1/2"	1/2"	61135K31	0000	0000


						5/16"-18	3/4"	1 1/2"	3/8"	5/8"	3/8"	61135K33	0000	0000
						3/8"-16	1"	2"	1/2"	13/16"	1/2"	61135K35	0000	0000
						1/2"-13	1 1/8"	2 1/2"	9/16"	1"	9/16"	61135K37	0000	0000

Style 5—Four-Arm Grip

Style 5

303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
303 Stainless Steel



		1/4"-20	3/8"	1 1/4"	3/8"	1/2"	3/8"	4384K1	000000	000000


		5/16"-18	1/2"	1 9/16"	1/2"	9/16"	1/2"	4384K2	00000	00000
		3/8"-16	5/8"	1 15/16"	9/16"	11/16"	11/16"	4384K3	00000	00000
		1/2"-13	13/16"	2 1/2"	3/4"	13/16"	13/16"	4384K4	00000	00000

Style 6—Four-Arm Grip

Style 6

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

Nylon—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Nylon has good wear resistance.

Polypropylene—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Polypropylene has good impact resistance.

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Phenolic



		1/4"-20	3/8"	1 1/2"	1/2"	5/8"	1/2"	Brass	-30 to 400	5993K63	00000	00000


		5/16"-18	1/2"	1 1/2"	1/2"	5/8"	1/2"	Brass	-30 to 400	5993K64	0000	0000
		5/16"-18	1/2"	2"	1/2"	7/8"	1/2"	Brass	-30 to 400	5993K66	0000	0000
		3/8"-16	1/2"	2"	1/2"	7/8"	1/2"	Brass	-30 to 400	5993K31	0000	0000
		3/8"-24	5/8"	2"	1/2"	7/8"	1/2"	Brass	-30 to 400	5993K32	0000	0000
		1/2"-13	5/8"	2"	1/2"	7/8"	11/16"	Brass	-30 to 400	5993K33	0000	0000
		1/2"-20	5/8"	2"	1/2"	7/8"	5/8"	Brass	-30 to 400	5993K34	0000	0000


		Black Nylon



				1/4"-20	1/2"	1 1/4"	3/8"	1/2"	1/2"	Brass	-15 to 150	5993K22	0000	0000


				1/4"-20	1/2"	2 1/4"	9/16"	1"	7/16"	Brass	-15 to 150	5993K83	0000	0000


				Black Polypropylene



						1/4"-20	1/2"	1 3/4"	9/16"	3/4"	7/16"	Brass	-15 to 125	5993K54	0000	0000


						5/16"-18	1/2"	1 3/4"	9/16"	3/4"	7/16"	Brass	-15 to 125	5993K55	0000	0000
						5/16"-18	1/2"	2 1/4"	9/16"	1"	7/16"	Brass	-15 to 125	5993K84	0000	0000
						3/8"-16	1/2"	1 3/4"	9/16"	3/4"	7/16"	Brass	-15 to 125	5993K56	0000	0000
						3/8"-16	1/2"	2 1/4"	9/16"	1"	7/16"	Brass	-15 to 125	5993K85	0000	0000

Style 7—Four-Arm Grip

Style 7

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Iron



		1/4"-20	11/16"	1 1/8"	5/16"	9/16"	3/8"	6042K77	000000	00000


		5/16"-18	1"	1 1/2"	7/16"	5/8"	9/16"	6042K78	00000	0000
		3/8"-16	1"	2"	7/16"	3/4"	9/16"	6042K79	00000	00000
		1/2"-13	1 1/2"	2 9/16"	1/2"	1 1/8"	1"	6042K81	00000	00000
		5/8"-11	2 1/4"	2 1/2"	1/2"	1"	1 3/4"	6042K82	00000	00000

Style 8—Four-Arm Grip

Style 8

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Set Screw Thread Size	Set Screw Included		1-9	10-Up
Iron



		3/8"-16	1"	2"	7/16"	3/4"	9/16"	1/4"-20	Yes	3948T25	000000	000000


		1/2"-13	1 1/2"	2 9/16"	1/2"	1 1/8"	1"	1/4"-20	Yes	3948T26	00000	00000
		5/8"-11	2 1/4"	2 1/2"	1/2"	1"	1 3/4"	1/4"-20	Yes	3948T27	00000	00000

Style 9—Five-Arm Grip

Style 9

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Iron



		5/8"-11	1 3/4"	3"	1/2"	1 1/4"	1 1/4"	6042K83	000000	000000


		3/4"-10	1 3/4"	3 1/4"	1/2"	1 1/2"	1 1/4"	6042K84	00000	00000

Style 10—Five-Arm Grip

Style 10

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Set Screw Thread Size	Set Screw Included		1-9	10-Up
Iron



		5/8"-11	1 3/4"	3"	1/2"	1 1/4"	1 1/4"	1/4"-20	Yes	3948T28	000000	000000


		3/4"-10	1 3/4"	3 1/4"	1/2"	1 1/2"	1 1/4"	1/4"-20	Yes	3948T29	00000	00000

Style 11—Six-Arm Grip

Style 11

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Iron



		3/8"-16	1"	2"	1/2"	7/8"	1/2"	6042K161	000000	000000


		3/8"-16	2"	1 1/2"	1/2"	7/8"	1 1/2"	6042K71	00000	00000
		3/8"-16	2"	2"	1/2"	7/8"	1 1/2"	6042K72	00000	00000
		1/2"-13	1 1/4"	2 3/4"	1/2"	1 1/4"	3/4"	6042K73	00000	00000
		1/2"-13	2"	2 3/4"	1/2"	1 1/4"	1 1/2"	6042K74	00000	00000
		3/4"-10	1 1/2"	3 1/2"	5/8"	1 5/8"	7/8"	6042K75	00000	00000

Style 12—Six-Arm Grip

Style 12

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Set Screw Thread Size	Set Screw Included		1-9	10-Up
Iron



		3/8"-16	2"	2"	1/2"	7/8"	1 1/2"	1/4"-20	Yes	3948T21	000000	000000


		1/2"-13	1 1/4"	2 3/4"	1/2"	1 1/4"	3/4"	1/4"-20	Yes	3948T22	00000	00000
		1/2"-13	2"	2 3/4"	1/2"	1 1/4"	1 1/2"	1/4"-20	Yes	3948T23	00000	00000
		3/4"-10	1 1/2"	3 1/2"	5/8"	1 5/8"	7/8"	1/4"-20	Yes	3948T24	00000	00000

Style 13—Six-Arm Grip

Style 13

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

	Thread		Head, mm		Hub, mm					Each
	Sz.	Dp., mm	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Phenolic



		M6 × 1 mm	18	40	15	21	13	Brass	0 to 240	4273T81	00000	00000


		M8 × 1.25 mm	18	40	15	21	13	Brass	0 to 240	4273T82	0000	0000
		M8 × 1.25 mm	18	50	17	24	15	Brass	0 to 240	4273T84	0000	0000
		M10 × 1.5 mm	18	40	15	21	13	Brass	0 to 240	4273T83	0000	0000
		M10 × 1.5 mm	18	50	17	24	15	Brass	0 to 240	4273T85	0000	0000
		M12 × 1.75 mm	18	50	17	24	15	Brass	0 to 240	4273T86	0000	0000
		M12 × 1.75 mm	25	60	20	28	15	Brass	0 to 240	4273T87	0000	0000
		M16 × 2 mm	25	60	20	28	15	Brass	0 to 240	4273T88	00000	0000
		M16 × 2 mm	25	70	21	32	21	Brass	0 to 240	4273T89	00000	00000

Style 14—Seven-Arm Grip

Style 14

Nylon—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Nylon has good wear resistance.

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Nylon



		1/4"-20	7/16"	1 1/4"	7/16"	9/16"	3/8"	Steel	-40 to 200	6092K11	00000	00000


		5/16"-18	1/2"	1 9/16"	1/2"	11/16"	1/2"	Steel	-40 to 200	6092K13	0000	0000
		3/8"-16	9/16"	2"	5/8"	7/8"	11/16"	Steel	-40 to 200	6092K15	0000	0000
		1/2"-13	13/16"	2 1/2"	3/4"	1"	13/16"	Steel	-40 to 200	6092K17	0000	0000
		M6 × 1 mm	11 mm	32 mm	10 mm	14 mm	10 mm	Zinc-Plated Steel	-40 to 200	6092K21	0000	0000
		M8 × 1.25 mm	13 mm	40 mm	12 mm	18 mm	13 mm	Zinc-Plated Steel	-40 to 200	6092K23	0000	0000
		M10 × 1.5 mm	15 mm	50 mm	15 mm	22 mm	17 mm	Zinc-Plated Steel	-40 to 200	6092K25	0000	0000
		M12 × 1.75 mm	20 mm	63 mm	19 mm	26 mm	21 mm	Zinc-Plated Steel	-40 to 200	6092K27	0000	0000

Style 15—Seven-Arm Grip

Style 15

303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

	Thread		Head		Hub			Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
303 Stainless Steel



		1/4"-20	3/8"	1 1/4"	3/8"	1/2"	3/8"	8558K1	000000	000000


		5/16"-18	1/2"	1 9/16"	1/2"	9/16"	1/2"	8558K2	00000	00000
		3/8"-16	11/16"	1 15/16"	9/16"	11/16"	11/16"	8558K3	00000	00000
		1/2"-13	13/16"	2 1/2"	3/4"	3/4"	13/16"	8558K4	00000	00000

Vibration-Resistant Threaded Through-Hole Knobs


Style 1	Style 2

Like locknuts, these knobs have a nylon insert that grips threads to resist loosening. Long shafts can thread through these knobs for mounting versatility. Use the knobs as a grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all resist oil, grease, and solvents.

Style 1—Two-Arm Grip

Style 1

	Thread		Head		Hub					Each
	Sz.	Dp.	Wd.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Polypropylene



		1/4"-20	5/16"	2"	5/8"	3/4"	1/2"	Zinc-Plated Steel	-15 to 125	65035K41	00000	00000


		5/16"-18	5/16"	2"	5/8"	3/4"	1/2"	Zinc-Plated Steel	-15 to 125	65035K42	0000	0000
		5/16"-18	5/16"	2 1/2"	5/8"	3/4"	1/2"	Zinc-Plated Steel	-15 to 125	65035K43	0000	0000
		3/8"-16	1/2"	2"	5/8"	3/4"	1/2"	Zinc-Plated Steel	-15 to 125	65035K45	0000	0000
		3/8"-16	1/2"	2 1/2"	5/8"	3/4"	1/2"	Zinc-Plated Steel	-15 to 125	65035K44	0000	0000

Style 2—Five-Arm Grip

Style 2

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Polypropylene



		1/4"-20	5/16"	1 1/4"	7/16"	3/4"	3/4"	Zinc-Plated Steel	-15 to 125	59625K31	00000	00000


		1/4"-20	5/16"	1 3/4"	7/16"	3/4"	3/4"	Zinc-Plated Steel	-15 to 125	59625K33	0000	0000
		1/4"-20	5/16"	2 1/4"	1/2"	7/8"	1/4"	Zinc-Plated Steel	-15 to 125	59625K74	0000	0000
		5/16"-18	3/8"	1 1/4"	7/16"	3/4"	5/16"	Zinc-Plated Steel	-15 to 125	59625K32	0000	0000
		5/16"-18	3/8"	1 3/4"	7/16"	3/4"	3/4"	Zinc-Plated Steel	-15 to 125	59625K34	0000	0000
		5/16"-18	3/8"	2 1/4"	1/2"	7/8"	1/4"	Zinc-Plated Steel	-15 to 125	59625K75	0000	0000
		3/8"-16	7/16"	2 1/4"	1/2"	7/8"	1/4"	Zinc-Plated Steel	-15 to 125	59625K76	0000	0000

Unthreaded Through-Hole Knobs


Style 1	Style 2	Style 3	Style 4	Style 5	Style 6	Style 7

Create custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery. Long shafts can pass through these knobs for mounting versatility.

Style 1—Knurled-Head Grip

Style 1

Black-Oxide Steel—Black-oxide steel knobs are stronger than iron and have mild rust resistance.

303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

	Hole		Head		Hub					Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.	Set Screw Thread Size	Set Screw Included		1-9	10-Up
Black-Oxide Steel



		1/4"	3/4"	1"	1/4"	5/8"	1/2"	—	—	6121K34	00000	00000


		1/4"	3/4"	1"	1/4"	5/8"	1/2"	10-32	Yes	6333K17	0000	0000
		5/16"	1"	1 1/2"	5/16"	3/4"	11/16"	—	—	6121K35	0000	0000
		5/16"	1"	1 1/2"	5/16"	3/4"	11/16"	1/4"-20	Yes	6333K22	0000	0000
		3/8"	1 1/8"	2"	3/8"	1"	3/4"	—	—	6121K36	0000	0000
		3/8"	1 1/8"	2"	3/8"	1"	3/4"	5/16"-18	Yes	6333K25	0000	0000
		1/2"	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	—	—	6121K37	00000	00000
		1/2"	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	5/16"-18	Yes	6333K28	00000	00000
		5/8"	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	—	—	6121K38	00000	00000


		303 Stainless Steel



				1/4"	3/4"	1"	1/4"	5/8"	1/2"	—	—	60205K41	0000	0000


				1/4"	3/4"	1"	1/4"	5/8"	1/2"	10-32	Yes	2577K18	0000	0000
				5/16"	1"	1 1/2"	5/16"	3/4"	11/16"	—	—	60205K42	00000	00000
				5/16"	1"	1 1/2"	5/16"	3/4"	11/16"	1/4"-20	Yes	2577K23	00000	00000
				3/8"	1 1/8"	2"	3/8"	1"	3/4"	—	—	60205K43	00000	00000
				3/8"	1 1/8"	2"	3/8"	1"	3/4"	5/16"-18	Yes	2577K26	00000	00000
				1/2"	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	—	—	60205K44	00000	00000
				1/2"	1 1/2"	2 1/2"	9/16"	1 1/2"	15/16"	5/16"-18	Yes	2577K29	00000	00000
				5/8"	1 3/4"	3"	5/8"	1 3/4"	1 1/8"	—	—	60205K45	00000	00000

Style 2—Ribbed Grip

Style 2

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

	Hole		Head		Hub				Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.	Temp. Range, ° F		1-9	10-Up
Black Phenolic



		1/4"	3/4"	1 1/4"	3/8"	5/8"	3/8"	-30 to 400	6479K11	00000	00000


		5/16"	3/4"	1 1/4"	3/8"	5/8"	3/8"	-30 to 400	6479K12	0000	0000
		5/16"	3/4"	1 3/4"	3/8"	3/4"	3/8"	-30 to 400	6479K28	0000	0000
		3/8"	3/4"	1 3/4"	3/8"	3/4"	3/8"	-30 to 400	6479K29	0000	0000

Style 3—Ribbed Grip

Style 3

Zinc—Zinc alloy knobs have good corrosion resistance.

	Hole		Head		Hub			Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Zinc



		1/4"	5/8"	2"	5/16"	3/4"	5/16"	6048K27	00000	00000


		5/16"	5/8"	2"	5/16"	3/4"	5/16"	6048K28	0000	0000
		3/8"	5/8"	2"	5/16"	3/4"	5/16"	6048K29	0000	0000
		3/8"	7/8"	2 1/2"	7/16"	1 1/8"	7/16"	6048K31	0000	0000
		1/2"	7/8"	2 1/2"	7/16"	1 1/8"	7/16"	6048K32	0000	0000
		5/8"	7/8"	2 1/2"	7/16"	1 1/8"	7/16"	6048K33	0000	0000

Style 4—Four-Arm Grip

Style 4

	Hole		Head		Hub			Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Iron



		1/4"	11/16"	1 1/8"	5/16"	9/16"	3/8"	6042K57	000000	00000


		5/16"	1"	1 1/2"	7/16"	5/8"	9/16"	6042K58	00000	0000
		3/8"	1"	2"	7/16"	3/4"	9/16"	6042K59	00000	00000
		1/2"	1 1/2"	2 9/16"	1/2"	1 1/8"	1"	6042K61	00000	00000
		5/8"	2 1/4"	2 1/2"	1/2"	1"	1 3/4"	6042K62	00000	00000

Style 5—Four-Arm Grip

Style 5

303 Stainless Steel—303 stainless steel knobs have excellent corrosion resistance, making them the best choice for harsh environments. They also have good chemical resistance.

	Hole		Head		Hub			Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
303 Stainless Steel



		1/4"	3/4"	1 1/4"	3/8"	1/2"	3/8"	4384K35	000000	000000


		5/16"	1"	1 9/16"	1/2"	9/16"	1/2"	4384K36	00000	00000
		3/8"	1 1/4"	1 15/16"	9/16"	11/16"	11/16"	4384K37	00000	00000
		1/2"	1 5/8"	2 1/2"	13/16"	13/16"	13/16"	4384K38	00000	00000

Style 6—Five-Arm Grip

Style 6

Nylon—Plastic knobs are a lightweight alternative to metal. They resist oil, grease, and solvents. Nylon has good wear resistance.

	Hole		Head		Hub				Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.	Temp. Range, ° F		1-9	10-Up
Black Nylon



		1/4"	13/16"	2 1/4"	1/2"	13/16"	5/16"	-15 to 150	59625K21	00000	00000


		5/16"	13/16"	2 1/4"	1/2"	13/16"	5/16"	-15 to 150	59625K22	0000	0000
		3/8"	13/16"	2 1/4"	1/2"	13/16"	5/16"	-15 to 150	59625K23	0000	0000

Style 7—Six-Arm Grip

Style 7

	Hole		Head		Hub			Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Iron



		3/8"	1"	2"	1/2"	7/8"	1/2"	6042K162	000000	000000


		3/8"	2"	1 1/2"	1/2"	7/8"	1 1/2"	6042K51	00000	00000
		3/8"	2"	2"	1/2"	7/8"	1 1/2"	6042K52	00000	00000
		1/2"	1 1/4"	2 3/4"	1/2"	1 1/4"	3/4"	6042K53	00000	00000
		1/2"	2"	2 3/4"	1/2"	1 1/4"	1 1/2"	6042K54	00000	00000
		3/4"	1 1/2"	3 1/2"	5/8"	1 5/8"	7/8"	6042K55	00000	00000

Choose-a-Color Threaded Through-Hole Knobs

Identify equipment controls and components at a glance by their color. Long shafts can thread through these knobs for mounting versatility. Use the knobs as a grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all resist oil, grease, and solvents.

Four-Arm Grip

Image of Product. Front orientation. Knobs. Choose-a-Color Threaded Through-Hole Knobs.

	Thread		Head		Hub						Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F	Choose a Color		1-9	10-Up
Nylon



		1/4"-20	1/2"	1 3/4"	9/16"	3/4"	7/16"	Brass	15 to 245	Black, Blue, Green, Orange, Red, White	7921K61	00000	00000


		5/16"-18	1/2"	2 1/4"	9/16"	1"	7/16"	Brass	15 to 245	Black, Blue, Green, Orange, Red, White	7921K62	0000	0000
		3/8"-16	1/2"	2 1/4"	9/16"	1"	7/16"	Brass	15 to 245	Black, Blue, Green, Orange, Red, White	7921K63	0000	0000
		1/2"-13	5/8"	2 1/4"	9/16"	1"	7/16"	Brass	15 to 245	Black, Blue, Green, Orange, Red, White	7921K64	0000	0000

Comfort-Grip Threaded Through-Hole Knobs

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Long shafts can thread through these knobs for mounting versatility. Made of plastic, all resist oil, grease, and solvents.

Ribbed Grip

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Insert Material	Temp. Range, ° F		1-9	10-Up
Black Rubber-Coated Polypropylene



		5/16"-18	1/2"	2 1/2"	7/8"	1 1/4"	1/2"	Brass	-15 to 200	5532T33	00000	00000


		3/8"-16	1/2"	2 1/2"	7/8"	1 1/4"	1/2"	Brass	-15 to 200	5532T35	0000	0000
		1/2"-13	1/2"	2 1/2"	7/8"	1 1/4"	1/2"	Brass	-15 to 200	5532T37	0000	0000

Square-Through-Hole Valve Knobs

Aluminum

Zinc

Primarily used on spigot valves, slide these knobs over valves with a square stem and secure them in place with your fastener.

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

Zinc—Zinc alloy knobs have good corrosion resistance.

	Head		Hole
	Dia.	Ht.	Wd.	Dp.		Each
Eight-Arm Grip







				Aluminum

				2 1/2"	1/2"	1/4"	3/8"	63155K31	00000


				2 1/2"	1/2"	9/32"	3/8"	63155K411	0000
				2 1/2"	1/2"	3/8"	3/8"	63155K412	0000
				2 3/4"	1/2"	9/32"	3/8"	63155K32	0000
				2 3/4"	1/2"	3/8"	3/8"	63155K33	0000
				3 1/2"	9/16"	7/16"	7/16"	63155K34	0000
				3 1/2"	9/16"	1/2"	7/16"	63155K35	0000




						Zinc

						2 1/2"	1/2"	1/4"	3/8"	6055K41	0000


						2 1/2"	1/2"	9/32"	3/8"	6055K42	0000
						2 1/2"	1/2"	3/8"	3/8"	6055K43	0000
						2 3/4"	1/2"	9/32"	3/8"	6055K511	0000
						2 3/4"	1/2"	3/8"	3/8"	6055K512	0000
						3 1/2"	9/16"	7/16"	7/16"	6055K44	0000
						3 1/2"	9/16"	1/2"	7/16"	6055K45	0000

Quick-Lock Threaded Through-Hole Knobs

Quick to install, position, and remove, these knobs have an angled hole that allows you to tilt the knob to slide it over threads, then straighten it to grip the threads and secure the knob. They provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Four-Arm Grip

Steel—Steel knobs are stronger than phenolic knobs.

Phenolic—Phenolic knobs are a lightweight alternative to steel knobs. They resist oil, grease, solvents, and scratches.

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Threading	Temp. Range, ° F		1-9	10-Up
Steel



		1/4"-20	5/8"	1 1/8"	5/16"	9/16"	5/16"	Fully Threaded	—	6032K11	00000	00000


		5/16"-18	7/8"	1 1/2"	3/8"	11/16"	1/2"	Fully Threaded	—	6032K12	0000	0000
		3/8"-16	1"	2"	1/2"	13/16"	1/2"	Fully Threaded	—	6032K13	0000	0000
		1/2"-13	1 1/8"	2 1/2"	9/16"	1"	9/16"	Fully Threaded	—	6032K14	00000	0000
		5/8"-11	1 1/4"	3"	5/8"	1 1/4"	5/8"	Fully Threaded	—	6032K15	00000	00000
		3/4"-10	1 1/4"	3"	5/8"	1 1/4"	5/8"	Fully Threaded	—	6032K16	00000	00000


		Black Phenolic



				1/4"-20	1 1/8"	3"	9/16"	1"	9/16"	Fully Threaded	-30 to 400	2734N14	0000	0000


				3/8"-16	1 1/8"	3"	9/16"	1"	9/16"	Fully Threaded	-30 to 400	2734N15	0000	0000

Five-Arm Grip

Phenolic—Phenolic knobs are a lightweight alternative to steel knobs. They resist oil, grease, solvents, and scratches.

	Thread		Head		Hub					Each
	Sz.	Dp.	Dia.	Ht.	Dia.	Ht.	Threading	Temp. Range, ° F		1-9	10-Up
Black Phenolic



		1/2"-13	7/8"	1 11/16"	5/8"	1 3/16"	1/4"	Fully Threaded	-30 to 400	2734N16	00000	00000

Threaded-Hole Knobs

Style 1

Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Style 1—Knurled-Head Grip

Style 1

Black-Oxide Steel—Steel knobs have a black-oxide finish for mild rust resistance.

	Thread		Head, mm		Hub, mm			Each
	Sz.	Dp., mm	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Black-Oxide Steel



		M5 × 0.8 mm	10	19	6	13	10	60765K312	00000	00000


		M6 × 1 mm	13	25	6	16	13	60765K332	0000	0000
		M8 × 1.25 mm	13	25	6	16	13	60765K342	0000	0000

Threaded Through-Hole Bar Knobs

Install these knobs on a threaded stud. Insert a bar between the arms and twist. The bar provides maximum leverage to tighten knobs securely. Made of iron, these knobs have a zinc-plated finish for corrosion resistance.

Four-Arm Grip

	Thread			Head		Hub			Each
	Sz.	Dp.	For Max. Bar Dia.	Wd.	Ht.	Dia.	Ht.		1-9	10-Up
Zinc-Plated Iron



		3/8"-16	1 3/8"	7/16"	2"	1 1/4"	1 1/4"	7/8"	6145K14	000000	000000


		1/2"-13	1 3/8"	7/16"	2"	1 1/4"	1 1/4"	7/8"	6145K15	00000	00000
		1/2"-13	1 1/2"	11/16"	2 1/2"	1 7/16"	1 1/2"	15/16"	6145K22	00000	00000
		5/8"-11	1 3/8"	7/16"	2"	1 1/4"	1 1/4"	7/8"	6145K16	00000	00000
		5/8"-11	1 1/2"	11/16"	2 1/2"	1 7/16"	1 1/2"	15/16"	6145K23	00000	00000
		3/4"-10	1 1/2"	11/16"	2 1/2"	1 7/16"	1 1/2"	15/16"	6145K24	00000	00000