Five-Arm Knobs | McMaster-Carr

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Grip Style

Five Arm

System of Measurement

Thread Size

Mount Type

Threaded Through Hole

Unthreaded Hole

Unthreaded Through Hole

Stud Length

Head Diameter

Material

Hub Height

Hub Diameter

Stud Material

Color

Head Height

Thread Pitch

Screw Size

Thread Direction

Hole Diameter

Insert Material

Finish

Thread Depth

Maximum Temperature

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

DFARS Specialty Metals

REACH

Minimum Temperature

94 Products

Threaded-Stud Knobs


Style 16	Style 17

Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Style 16—Five-Arm Grip

Style 16

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.

			Head		Hub					Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F		1-9	10-99	100-Up
Black Nylon



		1/4"-20	1"	2 1/4"	1/2"	7/8"	5/16"	Steel	-15 to 150	59625K77	00000	00000	00000


		M6 × 1 mm	30 mm	57 mm	20 mm	21 mm	—	Steel	-20 to 250	59625K12	0000	0000	0000
		M8 × 1.25 mm	30 mm	57 mm	20 mm	21 mm	—	Steel	-20 to 250	59625K11	0000	0000	0000


		Black Polypropylene



				1/4"-20	1"	1 1/4"	7/16"	3/4"	5/16"	Steel	-15 to 200	59625K39	0000	0000	0000


				1/4"-20	1 1/2"	1 3/4"	7/16"	3/4"	5/16"	Steel	-15 to 200	59625K42	0000	0000	0000
				5/16"-18	3/4"	2 1/4"	1/2"	7/8"	1/4"	Steel	-15 to 125	59625K78	0000	0000	0000
				5/16"-18	1 1/2"	1 1/4"	7/16"	3/4"	5/16"	Steel	-15 to 200	59625K41	0000	0000	0000
				5/16"-18	2"	1 3/4"	7/16"	3/4"	3/4"	Steel	-15 to 200	59625K43	0000	0000	0000
				3/8"-16	1"	2 1/4"	1/2"	7/8"	1/4"	Steel	-15 to 125	59625K79	0000	0000	0000

Style 17—Five-Arm Knurled-Head Grip

Style 17

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

			Head		Hub					Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F		1-9	10-99	100-Up
Black Phenolic



		1/4"-20	1/2"	1 3/16"	7/16"	13/16"	3/8"	Stainless Steel	-30 to 400	7129T33	00000	00000	00000


		1/4"-20	1/2"	1 5/8"	5/8"	1 3/16"	1/4"	Stainless Steel	-30 to 400	7129T34	0000	0000	0000
		5/16"-18	1/2"	1 3/16"	7/16"	13/16"	3/8"	Stainless Steel	-30 to 400	7129T21	0000	0000	0000
		5/16"-18	1/2"	1 5/8"	5/8"	1 3/16"	1/4"	Stainless Steel	-30 to 400	7129T27	0000	0000	0000
		5/16"-18	1"	1 3/16"	7/16"	13/16"	3/8"	Stainless Steel	-30 to 400	7129T22	0000	0000	0000
		5/16"-18	1"	1 5/8"	5/8"	1 3/16"	1/4"	Stainless Steel	-30 to 400	7129T28	0000	0000	0000

Comfort-Grip Threaded-Stud Knobs

Style 6

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Mount these knobs into a threaded hole. Made of plastic, all resist oil, grease, and solvents.

Style 6—Five-Arm Grip

Style 6

			Head		Hub					Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F		1-9	10-Up
Black Rubber-Coated Polypropylene



		1/4"-20	3/4"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K34	00000	00000


		1/4"-20	1"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K43	0000	0000
		1/4"-20	1"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K52	0000	0000
		1/4"-20	1"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K61	0000	0000
		1/4"-20	1 1/4"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K45	0000	0000
		1/4"-20	1 1/4"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K54	0000	0000
		1/4"-20	1 1/4"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K63	0000	0000
		5/16"-18	1"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K35	0000	0000
		5/16"-18	1 1/2"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K47	0000	0000
		5/16"-18	1 1/2"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K71	0000	0000
		5/16"-18	1 1/2"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K65	0000	0000


		3/8"-16	1"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K36	0000	0000
		3/8"-16	1 1/2"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K48	0000	0000
		3/8"-16	1 1/2"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K56	0000	0000
		3/8"-16	1 1/2"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K67	0000	0000
		3/8"-16	1 3/4"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K49	0000	0000
		3/8"-16	1 3/4"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Steel	-15 to 210	61125K58	0000	0000
		3/8"-16	1 3/4"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Steel	-15 to 210	61125K69	0000	0000
		M6 × 1 mm	25 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Steel	-15 to 210	61125K75	0000	0000
		M6 × 1 mm	25 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K78	0000	0000
		M6 × 1 mm	25 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K82	0000	0000


		M8 × 1.25 mm	25 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Steel	-15 to 210	61125K76	0000	0000
		M8 × 1.25 mm	25 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K79	0000	0000
		M8 × 1.25 mm	25 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K83	0000	0000
		M10 × 1.5 mm	30 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Steel	-15 to 210	61125K77	0000	0000
		M10 × 1.5 mm	30 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K81	0000	0000
		M10 × 1.5 mm	30 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Steel	-15 to 210	61125K84	0000	0000

Threaded-Hole Knobs


Style 25	Style 26

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

Style 25—Five-Arm Grip

Style 25

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 Nylon



		M6 × 1 mm	12 mm	57 mm	20 mm	21 mm	—	Brass	-20 to 250	59625K14	00000	00000


		M8 × 1.25 mm	12 mm	57 mm	20 mm	21 mm	—	Brass	-20 to 250	59625K13	0000	0000


		Black Polypropylene



				1/4"-20	3/8"	2 1/4"	1/2"	7/8"	1/4"	Brass	-15 to 125	59625K71	0000	0000


				1/4"-20	1/2"	1 1/4"	7/16"	3/4"	5/16"	Brass	-15 to 200	59625K35	0000	0000
				1/4"-20	1/2"	1 3/4"	7/16"	3/4"	5/16"	Brass	-15 to 200	59625K37	0000	0000
				5/16"-18	1/2"	1 1/4"	7/16"	3/4"	5/16"	Brass	-15 to 200	59625K36	0000	0000
				5/16"-18	1/2"	1 3/4"	7/16"	7/8"	5/16"	Brass	-15 to 200	59625K38	0000	0000
				5/16"-18	1/2"	2 1/4"	1/2"	7/8"	1/4"	Brass	-15 to 125	59625K72	0000	0000
				3/8"-16	1/2"	2 1/4"	1/2"	7/8"	1/4"	Brass	-15 to 125	59625K73	0000	0000

Style 26—Five-Arm Grip

Style 26

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

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



		M6 × 1 mm	15	40	13	14	13	62015K1	000000	00000


		M8 × 1.25 mm	15	40	13	14	13	62015K212	00000	0000
		M10 × 1.5 mm	18	50	16	19	16	62015K312	00000	00000
		M12 × 1.75 mm	22	60	20	21	20	62015K412	00000	00000
		M16 × 2 mm	28	70	23	26	23	62015K512	00000	00000

Vibration-Resistant Threaded Through-Hole Knobs

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 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

Comfort-Grip Threaded-Hole Knobs

Style 6

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Install these knobs on a threaded stud. Made of plastic, all resist oil, grease, and solvents.

Style 6—Five-Arm Grip

Style 6

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



		1/4"-20	1/2"	1 1/2"	15/16"	11/16"	3/16"	Zinc-Plated Brass	-15 to 210	61125K11	00000	00000


		5/16"-18	1/2"	1 7/8"	15/16"	15/16"	3/16"	Zinc-Plated Brass	-15 to 210	61125K12	0000	0000
		3/8"-16	1/2"	2 1/4"	15/16"	1 1/4"	3/16"	Zinc-Plated Brass	-15 to 210	61125K13	0000	0000
		M6 × 1 mm	13 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Brass	-15 to 210	61125K85	0000	0000
		M6 × 1 mm	13 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K88	0000	0000
		M6 × 1 mm	13 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K92	0000	0000
		M8 × 1.25 mm	13 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Brass	-15 to 210	61125K86	0000	0000
		M8 × 1.25 mm	13 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K89	0000	0000
		M8 × 1.25 mm	13 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K93	0000	0000
		M10 × 1.5 mm	13 mm	39 mm	23 mm	19 mm	5 mm	Zinc-Plated Brass	-15 to 210	61125K87	0000	0000
		M10 × 1.5 mm	13 mm	48 mm	23 mm	23.5 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K91	0000	0000


		M10 × 1.5 mm	13 mm	57 mm	24 mm	32 mm	4 mm	Zinc-Plated Brass	-15 to 210	61125K94	0000	0000

Unthreaded-Hole Knobs


Style 8	Style 9

Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Style 8—Five-Arm Grip

Style 8

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

	Hole, mm		Head, mm		Hub, mm			Each
	Dia.	Dp.	Dia.	Ht.	Dia.	Ht.		1-9	10-Up
Aluminum



		8	15	40	13	14	13	62015K211	000000	00000


		10	18	50	16	19	16	62015K311	00000	00000
		12	22	60	20	21	20	62015K411	00000	00000
		16	28	70	23	26	23	62015K511	00000	00000

Style 9—Five-Arm Grip

Style 9

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.	Insert Material	Set Screw Thread Size	Temp. Range, ° F	Set Screw Included		1-9	10-Up
Black Phenolic



		1/4"	7/16"	1 5/8"	5/8"	1 3/16"	1/4"	Brass	10-32	-30 to 400	Yes	7129T46	00000	00000

Vibration-Resistant Threaded-Stud Knobs

Bonded to the stud is an acrylic adhesive that adds friction to resist loosening from vibration. Use these knobs to position, tighten, and hold fixtures, equipment, and machinery. They mount into a threaded hole. The studs have an outer layer of zinc that prevents the steel from rusting in wet areas. Made of plastic, all of the knobs resist oil, grease, and solvents.

Five-Arm Grip

Polypropylene—For impact resistance, choose polypropylene knobs.

			Head, mm		Hub, mm					Each
	Thread Size	Stud Lg., mm	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F		1-9	10-Up
Black Polypropylene



		M6 × 1 mm	20	44	11	19	8	Zinc-Plated Steel	-20 to 125	7639K118	00000	00000


		M6 × 1 mm	20	57	12	21	7	Zinc-Plated Steel	-20 to 125	7639K115	0000	0000
		M10 × 1.5 mm	30	57	12	21	7	Zinc-Plated Steel	-20 to 125	7639K116	0000	0000

Screw-Head Mount Knobs

Style 6

To build a custom knob or thumb screw, pair one of these knobs with a hex or socket head screw and press the knob and screw together. All of these knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, they resist oil, grease, and solvents. Use color to identify equipment controls and components at a glance.

Style 6—Five-Arm Grip

Style 6

		Head
	For Screw Size	Dia.	Ht.	Temp. Range, ° F	Color	Pkg. Qty.		Pkg.
Polypropylene—For Hex Head Screws



		No. 10	1 1/4"	3/4"	-40 to 125	Black	10	94052A550	000000

Threaded Through-Hole Knobs


Style 9	Style 10

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 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

Unthreaded Through-Hole Knobs

Style 6

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 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

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.

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

Machinable-Hub Knobs

Style 6

Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Style 6—Five-Arm Grip

Style 6

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



		3"	1/2"	1 1/4"	1 1/4"	6042K43	000000	000000


		3 1/4"	1/2"	1 1/2"	1 1/4"	6042K44	00000	00000