Finger Clamps | McMaster-Carr

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Thumb Screw with Stem

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33 Products

Build-Your-Own Ring Stand

Build a custom clamping system for holding lightweight objects such as beakers and laboratory equipment. First choose a base, and then add rods, connectors, and clamps.

Bases


Nickel-Plated Zinc Alloy, 1 Rod Capacity	Cast Iron 3 Rod Capacity

							Mounting Holes
	For Rod Dia.	Rod Cap.	Mount Type	Dia.	Lg.	Mounting Fasteners Included	No. of	Dia.		Each
Nickel-Plated Zinc Alloy



		1/2"	1	Bolt On	2.3"	—	Yes	3	3/4"	50165A13	000000


		Cast Iron



				1/2"	3	Freestanding	—	7"	—	—	—	50165A14	00000

Rods

303 Stainless Steel—Stainless steel components provide excellent corrosion resistance.

	Lg.		Each
303 Stainless Steel



	1/2"	6"	50165A32	000000


	1/2"	12"	50165A33	00000
	1/2"	18"	50165A34	00000
	1/2"	24"	50165A35	00000

Connectors

304 Stainless Steel—Stainless steel components provide excellent corrosion resistance.

Rod-to-Rod Connection—Rod-to-rod connector holds two rods at a 90° angle.

		Each
304 Stainless Steel



	Rod-to-Rod	50165A64	000000

Clamps


Nickel-Plated Zinc Alloy Thumb Screw	Nickel-Plated Zinc Alloy Thumb Screw with Stem	304 Stainless Steel Thumb Screw with Stem

Clamps require a connector to attach to rods.

304 Stainless Steel—Stainless steel components provide excellent corrosion resistance.

	Lg.	Reach Lg.	Jaw Texture		Each
Nickel-Plated Zinc Alloy Thumb Screw



	0" to 3"	5"	2 9/16"	Smooth	50165A65	000000


	0" to 3 3/4"	7"	3 3/16"	Smooth	50165A66	00000


	Nickel-Plated Zinc Alloy Thumb Screw with Stem



			0" to 3"	8 1/2"	2 3/16"	Smooth	50165A67	00000


			0" to 3 5/8"	9"	3 3/16"	Smooth	50165A68	00000


			304 Stainless Steel Thumb Screw with Stem



					0" to 1 7/8"	6 3/4"	1 1/2"	Smooth	50165A69	000000

Clamps for Parts Inspection

With a light yet sturdy hold, these clamps help you keep workpieces in place hands-free for measuring and inspecting. Thread them right into your fixturing surface, whether it’s a plate, tower, or table. Because they apply less pressure than machining clamps, they won’t distort your parts, so you can take accurate measurements. While these clamps aren’t sturdy enough for use in machining, you can still use them for light fabrication work, such as laser engraving.

Hold-Down Clamps


Thumb Screw	Squeeze Tabs

Hold-down clamps secure parts from the top.

Thumb Screw—Clamps with a thumb screw give you more control over the pressure you apply on a workpiece than tension spring clamps. Twisting the screw moves the clamp up or down in small increments, so they’re less likely to dent or scratch your workpiece. The knurled head on the screw is slip resistant, letting you make precise turns with reliable grip.

Squeeze Tabs—Clamps with squeeze tabs on the back are best for supporting delicate parts. They have the lightest touch of any clamps we offer, because the tension is held in the tabs rather than the clamp itself. Press the tabs together like a clothespin and rotate the clamp where you need it.

	Clamps						Replacement Mounting Shafts		Replacement Clamp Arms
	Reach Lg.	Ht.	Thread Lg.	Material		Each		Each		Each
Thumb Screw







				1/4"-20 Threads

				1 9/16"	1 1/2"	3/8"	Aluminum	6203N11	000000	———	0	———	0


				3"	2 1/2"	1/4"	Aluminum	6203N12	00000	———	0	———	0
				4 3/8"	3 1/2"	3/8"	Aluminum	6203N13	000000	———	0	———	0




						M6 × 1 mm Threads

						40 mm	38 mm	9.5 mm	Aluminum	6203N14	00000	———	0	———	0


						76 mm	63 mm	6.4 mm	Aluminum	6203N15	00000	———	0	———	0
						112 mm	89 mm	9.5 mm	Aluminum	6203N16	000000	———	0	———	0


						Squeeze Tabs







										1/4"-20 Threads

										3 1/4"	3"	3/8"	Plastic	6203N21	00000	6203N18	000000	6203N17	000000




												M6 × 1 mm Threads

												83 mm	76 mm	9.5 mm	Plastic	6203N22	00000	6203N19	00000	6203N17	00000

Fingertip Setup Clamps

Making minimal contact with the workpiece while holding securely, these clamps are good for small parts and can clamp into holes and notches. Use with T-slot nuts or bolts and a support to secure a workpiece to a machine table. They can be supported with step blocks or any flat object.

Lg.	Wd.	Ht.	Slot Lg.	Edge-to-Slot Lg.	Tip Dia.	Material	Specs. Met		Each



5/16", 8 mm	3 15/16"	1 3/16"	5/8"	2 9/16"	1 3/8"	1/2"	Steel	DIN 6315C	4997A51	000000


3/8", 10 mm	4 15/16"	1 3/16"	13/16"	3 5/16"	1 5/8"	5/8"	Steel	DIN 6315C	4997A52	00000
5/8"	4"	1 3/4"	3/4"	2 5/8"	1 3/8"	5/8"	Steel	—	4997A2	0000
5/8"	6"	2"	7/8"	4 3/8"	1 5/8"	3/4"	Steel	—	4997A16	00000
3/4"	8"	2 5/8"	1 1/8"	6 1/8"	1 7/8"	7/8"	Steel	—	4997A17	00000
7/8"	10"	2 3/4"	1 1/4"	7 5/8"	2 3/8"	1"	Steel	—	4997A18	00000
1"	12"	3 1/4"	1 3/8"	9 3/8"	2 5/8"	1 1/8"	Steel	—	4997A19	00000
1 1/4", 30 mm	12 7/16"	3 1/8"	1 15/16"	8 7/16"	4"	1 13/16"	Steel	DIN 6315C	4997A53	000000

Right-Angle Locking Pliers Clamps for Sheets

Angled jaws clamp sheets, bars, and U-channels at 90°. Turn the knob to adjust the opening size; squeeze the handles to lock the clamp in place. Press the lever to release.

	Opening
	Max.	Min.	Reach Lg.	Holding Cap.	Overall Lg.	Lock Release	Body Material		Each
Smooth Fixed Jaws



		3/8"	0"	1/2"	Not Rated	9"	Lever	Steel	5084A12	000000

Locking Pliers Clamps for Sheets

Finger-shaped jaws grip thin sheets and bars. Turn the knob to adjust the opening size; squeeze the handles to lock the clamp in place. Press the lever to release.

	Opening
	Max.	Min.	Reach Lg.	Holding Cap.	Overall Lg.	Lock Release	Body Material		Each
Smooth Fixed Jaws



		2 3/4"	0"	2 3/4"	Not Rated	9"	Lever	Steel	5084A11	000000