Plastic Thumb Nuts | McMaster-Carr

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111 Products

Threaded Through-Hole Knobs


Style 2	Style 3	Style 6	Style 13	Style 14

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 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 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 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

Knurled-Head Thumb Nuts

Get a good grip on these nuts, even with oily fingers. They have a raised, slip-resistant head, so you can tighten them by hand and make controlled adjustments. Knurled-head nuts have a smaller profile than wing nuts, so they fit in tighter spots.

Plastic

Reinforced Acetal—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These nuts are reinforced with an aluminum threaded insert, so they can handle more torque than other plastic nuts and won't crack during installation.

Nylon—These nuts thread on smoothly and resist abrasion to stand up to scratches and bumps. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

		Collar
	Thread Size	Dia.	Ht.	Head Dia.	Ht.	Color	Threading	Insert Material	Pkg. Qty.		Pkg.
Reinforced Acetal



		4-40	9/32"	3/64"	5/16"	3/16"	Black	Fully Threaded	Aluminum	10	93886A101	00000


		6-32	23/64"	3/64"	3/8"	7/32"	Black	Fully Threaded	Aluminum	10	93886A110	0000
		8-32	25/64"	3/32"	1/2"	17/64"	Black	Fully Threaded	Aluminum	10	93886A120	00000
		10-24	31/64"	1/8"	5/8"	19/64"	Black	Fully Threaded	Aluminum	10	93886A102	00000
		10-32	31/64"	1/8"	5/8"	19/64"	Black	Fully Threaded	Aluminum	10	93886A130	00000
		1/4"-20	35/64"	1/16"	1"	23/64"	Black	Fully Threaded	Aluminum	10	93886A104	00000
		1/4"-20	35/64"	3/16"	3/4"	23/64"	Black	Fully Threaded	Aluminum	10	93886A140	00000
		1/4"-28	35/64"	1/16"	1"	23/64"	Black	Fully Threaded	Aluminum	10	93886A105	00000
		1/4"-28	35/64"	3/16"	3/4"	23/64"	Black	Fully Threaded	Aluminum	10	93886A103	00000
		5/16"-18	41/64"	1/8"	1"	27/64"	Black	Fully Threaded	Aluminum	10	93886A150	00000
		5/16"-24	41/64"	1/8"	1"	27/64"	Black	Fully Threaded	Aluminum	10	93886A210	00000


		M3 × 0.5 mm	9.1 mm	1.2 mm	9.6 mm	5.6 mm	Black	Fully Threaded	Aluminum	10	93886A220	0000
		M4 × 0.7 mm	9.9 mm	2.4 mm	13 mm	6.7 mm	Black	Fully Threaded	Aluminum	10	93886A230	00000
		M5 × 0.8 mm	11.5 mm	3.2 mm	16 mm	7.5 mm	Black	Fully Threaded	Aluminum	10	93886A240	00000
		M6 × 1 mm	13.6 mm	4.8 mm	19 mm	9.1 mm	Black	Fully Threaded	Aluminum	10	93886A250	00000
		M6 × 1 mm	14.3 mm	1.6 mm	26 mm	9.1 mm	Black	Fully Threaded	Aluminum	10	93886A260	00000
		M8 × 1.25 mm	16.3 mm	3.2 mm	26 mm	10.7 mm	Black	Fully Threaded	Aluminum	10	93886A270	00000


		Nylon



				6-32	1/4"	1/4"	1/2"	3/8"	Black	Fully Threaded	—	1	93995A300	0000


				6-32	1/4"	1/4"	3/4"	3/8"	Black	Fully Threaded	—	1	93995A380	0000
				8-32	5/16"	1/4"	1/2"	3/8"	Black	Fully Threaded	—	1	93995A320	0000
				8-32	5/16"	1/2"	1/2"	5/8"	Black	Fully Threaded	—	1	93995A330	0000
				10-24	3/8"	1/4"	1/2"	7/16"	Black	Fully Threaded	—	1	93995A340	0000
				10-32	3/8"	1/4"	1"	7/16"	Black	Fully Threaded	—	1	93995A350	0000
				1/4"-20	1/2"	1/4"	3/4"	1/2"	Black	Fully Threaded	—	1	93995A360	0000
				1/4"-20	1/2"	3/4"	1"	1"	Black	Fully Threaded	—	1	93995A370	0000

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

Nylon-Insert Wing Nuts

The strongest hold of all our thumb nuts. The wings give you extra leverage for a tight fit, while a nylon insert grips the screw to prevent loosening from vibration. However, the insert may become brittle if exposed to high temperatures. You can reuse these nuts a handful of times, but their holding power will decrease with each use.

Zinc Alloy

Zinc—Zinc alloy nuts have better corrosion resistance than steel to withstand occasional exposure to moisture. However, they're not as strong.

	Wd.	Ht.	Base Dia.	Insert Max. Temp., ° F	Pkg. Qty.		Pkg.
Zinc



	8-32	1 1/32"	1/2"	3/8"	225	10	98520A102	000000


	10-24	1 1/32"	1/2"	3/8"	225	25	98520A101	00000
	10-32	1 1/32"	1/2"	3/8"	225	25	98520A111	00000
	1/4"-20	1 1/4"	19/32"	7/16"	225	20	98520A119	00000
	1/4"-28	1 1/4"	19/32"	7/16"	225	20	98520A129	00000
	5/16"-18	1 1/2"	23/32"	9/16"	225	10	98520A140	00000
	5/16"-24	1 1/2"	23/32"	9/16"	225	10	98520A130	00000
	3/8"-16	1 1/2"	23/32"	9/16"	225	10	98520A145	00000

Wing Nuts

Style 1

The easiest nuts to twist on and off by hand, these are commonly used to fasten parts that need to be frequently disassembled, such as access panels and covers. The wings give you more leverage than knurled-head nuts, so you can apply greater torque and achieve a tighter fit.

Plastic

Style 1

Nylon 6/6—These nuts thread on smoothly and resist abrasion to stand up to scratches and bumps. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

								Pkg.
	Thread Size	Wd.	Ht.	Base Dia.	Choose a Color	Pkg. Qty.		1-9	10-49	50-Up
Nylon 6/6







				Style 1

				4-40	7/8"	1/2"	25/64"	Black, Off-White	100	94924A100	000000	000000	000000


				6-32	7/8"	1/2"	25/64"	Black, Off-White	100	94924A200	00000	00000	00000
				8-32	7/8"	1/2"	25/64"	Black, Off-White	100	94924A300	00000	00000	00000
				10-24	7/8"	1/2"	25/64"	Black, Off-White	100	94924A400	00000	00000	00000
				10-32	7/8"	1/2"	25/64"	Black, Off-White	100	94924A500	00000	00000	00000
				1/4"-20	1 1/8"	5/8"	9/16"	Black, Off-White	50	94924A600	00000	0000	0000
				5/16"-18	1 3/8"	3/4"	41/64"	Black, Off-White	50	94924A900	00000	0000	0000
				3/8"-16	1 3/8"	3/4"	41/64"	Black, Off-White	50	94924A700	00000	00000	00000
				1/2"-13	1 5/8"	7/8"	27/32"	Black, Off-White	50	94924A800	00000	00000	00000
				M4 × 0.7 mm	22.8 mm	12.2 mm	10.2 mm	Black, Off-White	50	92124A510	0000	0000	0000
				M5 × 0.8 mm	22.8 mm	12.2 mm	10.2 mm	Black, Off-White	50	92124A520	0000	0000	0000


				M6 × 1 mm	27.7 mm	16 mm	14.2 mm	Black, Off-White	50	92124A530	00000	00000	0000
				M8 × 1.25 mm	34.8 mm	18.3 mm	16.2 mm	Black, Off-White	50	92124A540	00000	00000	00000
				M10 × 1.5 mm	34.8 mm	18.3 mm	16.2 mm	Black, Off-White	50	92124A550	00000	00000	00000
				M12 × 1.75 mm	42.2 mm	22.7 mm	21.4 mm	Black, Off-White	25	92124A560	0000	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

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

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

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



		1/4"-20	1 1/8"	3"	9/16"	1"	9/16"	Fully Threaded	-30 to 400	2734N14	00000	00000


		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