5/16"-24 Knobs | McMaster-Carr

Filter by

System of Measurement

Thread Size

Material

Mount Type

Threaded Through Hole

Grip Style

Head Diameter

Length

Color

Thread Direction

Stud Length

Handle Style

Stud Material

Insert Material

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Hub Diameter

Finish

Fastener Head Type

Head Height

Thread Depth

Hub Height

Hole Shape

Thread Spacing

Threading

69 Products

Threaded-Hole-Mount Ball Knobs

Style 1

Install these traditional, easy-to-grip ball knobs on a threaded stud. They're good for control levers and push-pull rods.

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.

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

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

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

	Thread						Each
	Size	Dp.	Head Dia.	Insert Material	Temp. Range, ° F		1-9	10-Up
Style 1







				Steel

				5/16"-24	1/2"	1"	—	—	0000000	00000	00000


				5/16"-24	5/8"	1 3/8"	—	—	0000000	0000	0000




						303 Stainless Steel

						5/16"-24	5/8"	1 3/8"	—	—	0000000	00000	00000




								Aluminum

								5/16"-24	5/8"	1 3/8"	—	—	0000000	0000	0000




										Brass

										5/16"-24	1/2"	1"	—	—	00000000	00000	0000


										5/16"-24	5/8"	1 3/8"	—	—	00000000	00000	00000




												Black Phenolic

												5/16"-24	1/2"	1"	Brass	-30 to 400	0000000	0000	0000


												5/16"-24	1/2"	1 3/8"	Brass	-30 to 400	0000000	0000	0000




														Red Phenolic

														5/16"-24	1/2"	1"	Brass	-30 to 400	0000000	0000	0000


														5/16"-24	1/2"	1 3/8"	Brass	-30 to 400	0000000	0000	0000

Threaded-Stud Knobs

Style 1

Mount these knobs into a threaded hole. They 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.

			Head		Hub				Each
	Thread Size	Stud Lg.	Dia.	Ht.	Dia.	Ht.	Stud Material		1-9	10-99	100-Up
Black-Oxide Steel



		5/16"-24	1 3/4"	1 1/2"	5/16"	3/4"	11/16"	Steel	0000000	000000	000000	000000


		303 Stainless Steel



				5/16"-24	1 3/4"	1 1/2"	5/16"	3/4"	11/16"	Stainless Steel	0000000	00000	00000	00000


				Brass



						5/16"-24	1 3/4"	1 1/2"	5/16"	3/4"	11/16"	Stainless Steel	0000000	00000	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.

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.

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



		5/16"-24	5/8"	1 1/2"	5/16"	3/4"	11/16"	0000000	00000	00000


		303 Stainless Steel



				5/16"-24	5/8"	1 1/2"	5/16"	3/4"	11/16"	00000000	00000	0000


				Brass



						5/16"-24	5/8"	1 1/2"	5/16"	3/4"	11/16"	0000000	00000	00000

Threaded Through-Hole Knobs

Style 1

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.

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



		5/16"-24	1"	1 1/2"	5/16"	3/4"	11/16"	0000000	00000	00000


		303 Stainless Steel



				5/16"-24	1"	1 1/2"	5/16"	3/4"	11/16"	00000000	00000	00000

Six-Arm Plastic-Head Thumb Screws

These thumb screws have the largest head of any we offer. They're often found on stops, plates, and jigs. The six arms leave extra space to fit your fingers for easy twisting. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won't rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				5/16"-24

				1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	000000


				5/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				3/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				7/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				1"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				1 1/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				1 1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000

Oval Threaded-Hole-Mount Ball Knobs

Mount these oval, easy-to-grip ball knobs on a threaded stud. They're good for control levers and push-pull rods. Made of plastic, all resist oil, grease, and solvents.

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







			Black Phenolic

			5/16"-24	1/2"	1 1/8"	1 1/2"	1/2"	Brass	-30 to 400	0000000	00000	00000




					Red Phenolic

					5/16"-24	1/2"	1 1/8"	1 1/2"	1/2"	Brass	-30 to 400	00000000	0000	0000

Plastic-Knurled-Head Thumb Screws

Combine the strength of stainless steel with a lightweight head that won't rust. These thumb screws are an economical alternative to fully metal thumb screws. The knurled texture of the head creates extra grip as you twist.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Threading	Tensile Strength	Choose a Head Color	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				5/16"-24

				1/2"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	000000


				5/8"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	00000
				3/4"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	0000
				7/8"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	0000
				1"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	0000
				1 1/4"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	00000
				1 1/2"	1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black , Red	5	000000000	00000

Quick-Release Shaft Collar Adjustable Handles

These threaded handles take the place of a set screw, allowing you to move set screw shaft collars without additional tools—useful for when the collar serves as a stroke limiter or mounting clamp. The handle keeps your collar secure on the shaft, then lets you loosen and tighten the collar for quick adjustments.

Black-Oxide 1215 Carbon Steel—Black-oxide 1215 carbon steel handles have some corrosion resistance.

303 Stainless Steel—303 stainless steel handles have excellent corrosion resistance.

Thread					Black-Oxide 1215 Carbon Steel		303 Stainless Steel
Size	Lg.	Overall Lg.	Handle Dia.	Handle Texture		Each		Each
5/16"-24	3/4"	5 3/8"	1"	Knurled	0000000	000000	0000000	000000

Handle Nuts

Style A

Image of Attribute. Front orientation. Contains Annotated.

Use these handles for quick assembly and disassembly. Their offset grip provides leverage, making them a good alternative to wing nuts. Long shafts can thread through these handles for mounting versatility.

Zinc-Plated Iron—Zinc-plated iron handle nuts have corrosion resistance.

		Thread
	Style	Size	Dp.	Handle Lg.	Projection	Hub Projection		Each
Threaded Through-Hole Mount







				Iron

				A	5/16"-24	9/16"	3 3/16"	1 9/16"	9/16"	000000000	00000




						Zinc-Plated Iron

						A	5/16"-24	9/16"	3 3/16"	1 9/16"	9/16"	000000000	0000

Stainless Steel Flared-Collar Knurled-Head Thumb Screws

A flared collar leaves more space for your fingers to grasp these corrosion-resistant thumb screws. It also serves as a decorative finish. The knurled texture on the head creates extra grip as you twist.

Length is measured from under the collar.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

		Head		Collar
	Lg.	Dia.	Ht.	Dia.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				5/16"-24

				1/2"	41/64"	9/32"	1/2"	3/16"	Fully Threaded	80,000	1	000000000	00000


				3/4"	41/64"	9/32"	1/2"	3/16"	Fully Threaded	80,000	1	000000000	0000
				1"	41/64"	9/32"	1/2"	3/16"	Fully Threaded	80,000	1	000000000	0000
				1 1/4"	41/64"	9/32"	1/2"	3/16"	Fully Threaded	80,000	1	000000000	0000

Hex-Drive Plastic-Head Thumb Screws

Twist these thumb screws with a hex key when you need more torque than fingers can provide. You can also use a hex key to unfasten them in cramped spaces such as small control boxes. When fastening these thumb screws by hand, the knurled texture of the head creates extra grip as you twist. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won't rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				5/16"-24

				1/2"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	000000


				5/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				3/4"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				7/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				1 1/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000
				1 3/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	000000000	00000

Ball-Lever Shafts

Attach a ball knob (not included) to one of these shafts to create custom handles for operating machinery. Mount the other end into a threaded hole. These shafts can also be used to create your own gear levers.

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

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

		Stud						Each
	Thread Size	Lg. 1	Lg. 2	Handle Lg.	Dia.	Stud Material		1-9	10-Up
Threaded-Stud Mount







				Black-Oxide Steel

				5/16"-24	1/2"	3/8"	1 1/2"	3/8"	Steel	0000000	000000	00000


				5/16"-24	1/2"	3/8"	5"	3/8"	Steel	0000000	00000	00000




						303 Stainless Steel

						5/16"-24	1/2"	3/8"	1 1/2"	3/8"	303 Stainless Steel	0000000	00000	00000


						5/16"-24	1/2"	3/8"	5"	3/8"	303 Stainless Steel	0000000	00000	00000

Threaded-Stud-Mount Folding Pull Handles

These handles have a folding grip that drops out of the way when you let go. Insert studs into holes in your surface and secure from the backside to open and close a variety of doors and drawers on chests, crates, furniture, machines, and equipment. All have round grips that allow your hand to pivot in any direction.

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

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

	Stud Lg.	Grip Dia.	Projection	Pull Cap.	Mounting Fasteners Included		Each
Round Grip







	Stainless Steel—Dull

	90°	3"	5/16"-24	9/16"	1/4"	1 7/16"	Not Rated	Yes	00000000	000000


	90°	4"	5/16"-24	9/16"	1/4"	1 7/16"	Not Rated	Yes	00000000	00000
	90°	5"	5/16"-24	9/16"	1/4"	1 7/16"	Not Rated	Yes	00000000	00000
	90°	6"	5/16"-24	9/16"	1/4"	1 7/16"	Not Rated	Yes	00000000	00000




			Black Anodized Aluminum—Dull

			90°	3"	5/16"-24	9/16"	1/4"	1 7/16"	Not Rated	Yes	00000000	00000


			90°	4"	5/16"-24	3/8"	5/16"	1 7/8"	Not Rated	Yes	000000	00000
			90°	5"	5/16"-24	3/8"	5/16"	1 7/8"	Not Rated	Yes	000000	00000
			90°	6"	5/16"-24	3/8"	5/16"	1 7/8"	Not Rated	Yes	000000	00000

Steel and Iron Spade-Head Thumb Screws

Our most popular spade-head thumb screws. The head is slim and flat like a coin for extra leverage when twisting.

Length is measured from under the head.

Steel—An economical choice that's strong, but rusts in moisture. They're best for dry environments.

		Head
	Lg.	Wd.	Ht.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.
Steel







				5/16"-24

				3/4"	7/8"	11/16"	Fully Threaded	40,000	10	000000000	000000


				1"	7/8"	11/16"	Fully Threaded	40,000	10	000000000	00000
				1 1/2"	7/8"	11/16"	Fully Threaded	40,000	10	000000000	00000

Create-Your-Own Push/Pull Mechanical Control Cables


Clamp Mount	Panel Mount

Pair these cables with a knob or lever (not included) to operate valves, throttle controls, and HVAC damper controls from a distance. They're flexible for weaving around obstructions.

Clamp Mount—Clamp-mount cables have threaded fittings on both ends and a grooved body for mounting with strap clamps or U-bolts.

Panel Mount—Panel-mount cables are also known as bulkhead mount cables. They have threaded fittings with hex nuts and washers at each end for mounting through a panel.

	Thread				Dynamic Load Cap., lb.					Clamp Mount				Panel Mount
	Size	Lg.	Overall Lg., ft.	Max. Stroke Lg.	Push	Pull	Bend Radius	Fitting Material	Temp. Range, ° F	For Clamp Hole Dia.	Fitting Lg.		Each	For Panel Cutout Dia.	Fitting Lg.		Each
Stainless Steel Cable Core with Plastic Cover



		5/16"-24	1 3/16"	3	4"	140	140	6"	Zinc-Plated Steel	-65 to 225	—	—	———	0	3/4"	11 9/16"	00000000	0000000


		5/16"-24	1 3/16"	6	3"	170	170	6"	Zinc-Plated Steel	-65 to 225	—	—	———	0	3/4"	10 1/16"	00000000	000000
		5/16"-24	1 3/16"	6	4"	140	140	6"	Zinc-Plated Steel	-65 to 225	37/64"	10 37/64"	00000000	000000	—	—	———	0
		5/16"-24	1 3/16"	6	6"	80	80	6"	Zinc-Plated Steel	-65 to 225	—	—	———	0	3/4"	14 9/16"	00000000	000000

Accessories for Mechanical Control Cables