Seven-Lobe Knobs | McMaster-Carr

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Seven Arm

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Thread Size

Stud Length

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Threaded Through Hole

Material

Head Diameter

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Stud Material

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Insert Material

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Hub Height

Thread Pitch

Thread Direction

Hole Diameter

Head Height

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Minimum Temperature

RoHS

Compliant with Exemptions

Maximum Temperature

REACH

Export Control Classification Number (ECCN)

EAR99

Finish

PVC Coated

Zinc Plated

DFARS Specialty Metals

Hole Shape

106 Products

Threaded-Stud Knobs


Style 18	Style 19

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

Style 18—Seven-Arm Grip

Style 18

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

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



		1/4"-20	9/16"	1"	5/16"	1/2"	5/16"	Stainless Steel	-40 to 200	—	0000000	00000	00000


		1/4"-20	1 1/8"	1"	5/16"	1/2"	5/16"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		1/4"-20	1 5/16"	1"	5/16"	1/2"	5/16"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		5/16"-18	11/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		5/16"-18	15/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		5/16"-18	1 7/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		3/8"-16	11/16"	2"	9/16"	7/8"	11/16"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		3/8"-16	1 3/16"	2"	9/16"	7/8"	11/16"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		3/8"-16	1 11/16"	2"	9/16"	7/8"	11/16"	Stainless Steel	-40 to 200	—	0000000	0000	0000
		1/2"-13	13/16"	2 1/2"	3/4"	1"	13/16"	Stainless Steel	-40 to 200	—	0000000	00000	00000
		M5 × 0.8 mm	15 mm	25 mm	8 mm	12 mm	8 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000


		M5 × 0.8 mm	25 mm	25 mm	8 mm	12 mm	8 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M5 × 0.8 mm	25 mm	25 mm	8 mm	12 mm	8 mm	Steel	-40 to 200	—	00000000	0000	0000
		M6 × 1 mm	16 mm	32 mm	10 mm	14 mm	10 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M6 × 1 mm	20 mm	32 mm	10 mm	12 mm	10 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M6 × 1 mm	21 mm	32 mm	10 mm	14 mm	10 mm	Steel	-40 to 200	—	00000000	0000	0000
		M6 × 1 mm	30 mm	32 mm	10 mm	14 mm	10 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M6 × 1 mm	35 mm	32 mm	10 mm	12 mm	10 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M8 × 1.25 mm	20 mm	40 mm	13 mm	14 mm	13 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M8 × 1.25 mm	25 mm	40 mm	12 mm	18 mm	13 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M8 × 1.25 mm	25 mm	40 mm	12 mm	18 mm	13 mm	Steel	-40 to 200	—	00000000	0000	0000


		M8 × 1.25 mm	40 mm	40 mm	12 mm	18 mm	13 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M8 × 1.25 mm	40 mm	40 mm	13 mm	14 mm	13 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M10 × 1.5 mm	25 mm	50 mm	15 mm	22 mm	17 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M10 × 1.5 mm	30 mm	50 mm	15 mm	18 mm	17 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M10 × 1.5 mm	50 mm	50 mm	15 mm	22 mm	17 mm	Steel	-40 to 200	—	00000000	0000	0000
		M10 × 1.5 mm	55 mm	50 mm	15 mm	18 mm	17 mm	Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M10 × 1.5 mm	55 mm	50 mm	15 mm	22 mm	17 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	0000	0000
		M12 × 1.75 mm	30 mm	63 mm	19 mm	26 mm	21 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	00000	00000
		M12 × 1.75 mm	35 mm	63 mm	19 mm	20 mm	21 mm	Steel	-20 to 230	DIN 6336	0000000	00000	0000
		M12 × 1.75 mm	40 mm	63 mm	19 mm	26 mm	21 mm	Steel	-40 to 200	—	00000000	0000	0000


		M12 × 1.75 mm	50 mm	63 mm	19 mm	26 mm	21 mm	Stainless Steel	-20 to 230	DIN 6336	0000000	00000	00000
		M12 × 1.75 mm	60 mm	63 mm	19 mm	20 mm	21 mm	Steel	-20 to 230	DIN 6336	0000000	00000	00000

Style 19—Seven-Arm Grip

Style 19

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.

			Head		Hub				Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material		1-9	10-Up
303 Stainless Steel



		5/16"-18	1 3/16"	1 9/16"	1/2"	1/2"	1/2"	Stainless Steel	0000000	000000	000000


		5/16"-18	1 9/16"	1 9/16"	1/2"	1/2"	1/2"	Stainless Steel	0000000	00000	00000
		3/8"-16	1 9/16"	1 9/16"	1/2"	1/2"	1/2"	Stainless Steel	0000000	00000	00000
		3/8"-16	1 15/16"	1 9/16"	1/2"	1/2"	1/2"	Stainless Steel	0000000	00000	00000
		1/2"-13	1 15/16"	1 15/16"	5/8"	11/16"	11/16"	Stainless Steel	0000000	00000	00000
		1/2"-13	2 3/8"	1 15/16"	5/8"	11/16"	11/16"	Stainless Steel	0000000	00000	00000
		M8 × 1.25 mm	30 mm	40 mm	12 mm	14 mm	13 mm	Stainless Steel	0000000	00000	00000
		M8 × 1.25 mm	40 mm	40 mm	12 mm	14 mm	13 mm	Stainless Steel	0000000	00000	00000
		M10 × 1.5 mm	30 mm	40 mm	12 mm	14 mm	13 mm	Stainless Steel	0000000	00000	00000
		M10 × 1.5 mm	40 mm	40 mm	12 mm	14 mm	13 mm	Stainless Steel	0000000	00000	00000
		M12 × 1.75 mm	40 mm	50 mm	16 mm	18 mm	17 mm	Stainless Steel	0000000	00000	00000


		M12 × 1.75 mm	50 mm	50 mm	16 mm	18 mm	17 mm	Stainless Steel	0000000	00000	00000

Choose-a-Color Threaded-Stud Knobs

Identify equipment controls and components at a glance by their color. Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all resist oil, grease, and solvents.

Style 2—Seven-Arm Grip

Image of Product. Front orientation. Style 2. Choose-a-Color Threaded-Stud Knobs.

Style 2 knobs have a colored cap in the center of the head.

			Head		Hub								Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material	Temp. Range, ° F	Specs. Met	Color	Choose a Cap Color		1-9	10-Up
Nylon



		10-32	3/8"	1"	5/16"	1/2"	5/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	00000	00000


		10-32	13/16"	1"	5/16"	1/2"	5/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		1/4"-20	13/16"	1 1/4"	3/8"	9/16"	3/8"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		1/4"-20	1 3/16"	1 1/4"	3/8"	9/16"	3/8"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		5/16"-18	13/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		5/16"-18	1 9/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		3/8"-16	13/16"	2"	5/8"	7/8"	11/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		3/8"-16	1 9/16"	2"	5/8"	7/8"	11/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M6 × 1 mm	20 mm	32 mm	10 mm	14 mm	10 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M6 × 1 mm	30 mm	32 mm	10 mm	14 mm	10 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M8 × 1.25 mm	30 mm	40 mm	12 mm	18 mm	13 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000


		M8 × 1.25 mm	40 mm	40 mm	12 mm	18 mm	13 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M10 × 1.5 mm	40 mm	50 mm	15 mm	22 mm	17 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M10 × 1.5 mm	50 mm	50 mm	15 mm	22 mm	17 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000

Choose-a-Color Threaded-Hole Knobs

Identify equipment controls and components at a glance by their color. Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all resist oil, grease, and solvents.

Style 2—Seven-Arm Grip

Image of Product. Front orientation. Style 2. Choose-a-Color Threaded-Hole Knobs.

Style 2 knobs have a colored cap in the center of the head.

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



		10-32	3/8"	1"	5/16"	1/2"	5/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	00000	00000


		1/4"-20	3/8"	1 1/4"	3/8"	9/16"	3/8"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		5/16"-18	9/16"	1 9/16"	1/2"	11/16"	1/2"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		3/8"-16	9/16"	2"	9/16"	7/8"	11/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		1/2"-13	11/16"	2 1/2"	3/4"	1"	13/16"	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	00000	00000
		M5 × 0.8 mm	10 mm	25 mm	8 mm	12 mm	8 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M6 × 1 mm	10 mm	32 mm	10 mm	14 mm	10 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M8 × 1.25 mm	14 mm	40 mm	12 mm	18 mm	13 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M10 × 1.5 mm	14 mm	50 mm	15 mm	22 mm	17 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	0000	0000
		M12 × 1.75 mm	18 mm	63 mm	19 mm	26 mm	21 mm	Stainless Steel	-30 to 200	DIN 6336	Black	Black , Gray , Red , Yellow	0000000	00000	00000

Threaded Through-Hole Knobs


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 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	0000000	00000	00000


		5/16"-18	1/2"	1 9/16"	1/2"	11/16"	1/2"	Steel	-40 to 200	0000000	0000	0000
		3/8"-16	9/16"	2"	5/8"	7/8"	11/16"	Steel	-40 to 200	0000000	0000	0000
		1/2"-13	13/16"	2 1/2"	3/4"	1"	13/16"	Steel	-40 to 200	0000000	0000	0000
		M6 × 1 mm	11 mm	32 mm	10 mm	14 mm	10 mm	Zinc-Plated Steel	-40 to 200	0000000	0000	0000
		M8 × 1.25 mm	13 mm	40 mm	12 mm	18 mm	13 mm	Zinc-Plated Steel	-40 to 200	0000000	0000	0000
		M10 × 1.5 mm	15 mm	50 mm	15 mm	22 mm	17 mm	Zinc-Plated Steel	-40 to 200	0000000	0000	0000
		M12 × 1.75 mm	20 mm	63 mm	19 mm	26 mm	21 mm	Zinc-Plated Steel	-40 to 200	0000000	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"	000000	000000	000000


		5/16"-18	1/2"	1 9/16"	1/2"	9/16"	1/2"	000000	00000	00000
		3/8"-16	11/16"	1 15/16"	9/16"	11/16"	11/16"	000000	00000	00000
		1/2"-13	13/16"	2 1/2"	3/4"	3/4"	13/16"	000000	00000	00000

Threaded-Hole Knobs


Style 28	Style 29

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

Style 28—Seven-Arm Grip

Style 28

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

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



		M5 × 0.8 mm	9	25	8	12	8	Zinc-Plated Steel	-40 to 200	00000000	00000	00000


		M6 × 1 mm	9	32	10	14	10	Zinc-Plated Steel	-40 to 200	00000000	0000	0000
		M6 × 1 mm	12	32	10	12	10	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		M8 × 1.25 mm	14	40	12	18	13	Zinc-Plated Steel	-40 to 200	00000000	0000	0000
		M8 × 1.25 mm	14	40	13	14	13	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		M10 × 1.5 mm	18	50	15	18	17	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		M10 × 1.5 mm	21	50	15	22	17	Zinc-Plated Steel	-40 to 200	00000000	0000	0000
		M12 × 1.75 mm	22	63	19	20	21	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		M12 × 1.75 mm	23	63	19	26	21	Zinc-Plated Steel	-40 to 200	00000000	0000	0000

Style 29—Seven-Arm Grip

Style 29

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


		5/16"-18	9/16"	1 9/16"	1/2"	9/16"	1/2"	000000	00000	00000
		3/8"-16	11/16"	1 15/16"	5/8"	11/16"	11/16"	000000	00000	00000
		1/2"-13	7/8"	2 1/2"	3/4"	3/4"	13/16"	000000	00000	00000

Tethered Threaded-Stud Knobs

Never lose these knobs—tether them to equipment to keep them where you need them. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery. Made of plastic, all of these knobs resist oil, grease, and solvents. Mount them into a threaded hole.

Seven-Arm Grip

Image of Product. Front orientation. Knobs. Tethered Threaded-Stud Knobs.

			Head, mm		Hub, mm								Each
	Thread Size	Stud Lg., mm	Dia.	Ht.	Dia.	Ht.	Lanyard Lg., mm	Eye Dia., mm	Stud Material	Temp. Range, ° F	Specs. Met		1-9	10-Up
Black Nylon



		M5 × 0.8 mm	10	25	8	12	8	200	5	Stainless Steel	-40 to 190	DIN 6336	0000000	000000	000000


		M6 × 1 mm	25	32	10	14	10	200	5	Stainless Steel	-40 to 190	DIN 6336	0000000	00000	00000
		M10 × 1.5 mm	30	50	15	22	17	200	5	Stainless Steel	-40 to 190	DIN 6336	0000000	00000	00000

Unthreaded-Hole Knobs


Style 11	Style 12

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

Style 11—Seven-Arm Grip

Style 11

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

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



		6	12	32	10	12	10	Zinc-Plated Steel	-40 to 230	00000000	00000	00000


		8	14	40	13	14	13	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		10	18	50	15	18	17	Zinc-Plated Steel	-40 to 230	00000000	0000	0000
		12	22	63	19	20	21	Zinc-Plated Steel	-40 to 230	00000000	0000	0000

Style 12—Seven-Arm Grip

Style 12

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



		5/16"	9/16"	1 9/16"	1/2"	9/16"	1/2"	0000000	000000	000000


		3/8"	3/4"	1 15/16"	5/8"	11/16"	11/16"	0000000	00000	00000
		1/2"	13/16"	2 1/2"	3/4"	3/4"	13/16"	0000000	00000	00000

Tethered Threaded-Hole Knobs

Seven-Arm Grip

		Head, mm		Hub, mm							Each
	Thread Size	Dia.	Ht.	Dia.	Ht.	Lanyard Lg., mm	Eye Dia., mm	Temp. Range, ° F	Specs. Met		1-9	10-Up
Black Nylon



		M6 × 1 mm	32	10	14	10	200	5	-40 to 190	DIN 6336	0000000	000000	000000


		M10 × 1.5 mm	50	15	22	17	200	5	-40 to 190	DIN 6336	0000000	00000	00000