Expanding Pliers | McMaster-Carr

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74 Products

Squeeze-to-Open Bent-Nose Pliers

The spring in these pliers applies tension to your workpiece so your hand doesn’t have to. Just squeeze the handles to open the jaws and release to snap them shut. With a long, bent nose that curves around obstacles, they’re perfect for fishing small parts out of cramped spaces.

Flat Jaw—The most common style, these pliers have a broad contact area for gripping objects of various shapes.

Cushion Grip—Absorb pressure to make gripping and squeezing the handles more comfortable. They also add slip resistance for a secure hold.

		Jaw
	Overall Lg.	Bend	Lg. (A)	Lg. (B)	Opening Style	Texture	Tip Thk.	Material	With Wire Cutter		Each
Standard Nose with Flat Jaw







				Cushion Grip

				9 1/4"	35°	9/16"	3 1/16"	Manual	Serrated	1/4"	Steel	No	5295A41	000000

Battery Terminal Reamers

These tools spread open a battery cable clamp and clean the terminal all at once.

Material		Each
Steel	7455K4	000000

Locking Pliers Spreaders

The jaws on these tools apply outward pressure for use as a spreader. Turn the crank handle to adjust the opening size; squeeze the handles to lock the clamp in place. Press the lever to release.

	Reach Lg.	Holding Cap., lb.	Overall Lg.	Lock Release	Body Material		Each
Smooth Pivoting Jaw × Smooth Fixed Jaw



	1 3/4"	7/8"	500	6 1/2"	Lever	Steel	2523N11	000000


	2 3/4"	1 1/2"	900	10"	Lever	Steel	2523N12	00000

Soft Tubing Expanding Pliers


Closed	Open

Stretch the end of plastic and rubber tubing to make room for fittings with the same or slightly larger diameter. Insert the tips into tubing and squeeze the handles to open the jaws. Made of stainless steel, these pliers resist corrosion, and they can be sterilized to prevent contaminating tubing lines.

	Max. Expanded Tube ID	Overall Lg.	Tip Lg.	Material		Each
For Plastic, Rubber



	1/16"	3/32"	5"	3/8"	Stainless Steel	3317N13	000000


	3/32"	1/8"	5"	0.275"	Stainless Steel	3317N12	00000
	1/8"	3/16"	5"	0.236"	Stainless Steel	3317N11	00000

Tube Expanders

Enlarge the end of a tube to allow a second piece of the same diameter to fit inside.

	For Max. Wall Thk.	Lg.	Body Material	Head Material		Each
For Aluminum, Copper



	1/2", 5/8", 7/8", 1 1/8"	0.063"	24"	Aluminum	Steel	2637A12	0000000

Replacement Tube Expander Heads

Material	Choose a Tube OD		Each
Steel	1/2" , 5/8" , 7/8" , 1 1/8"	2637A101	0000000

High-Precision Squeeze-to-Open Tweezers

Standard Pointed Tips

Standard Round Tips

Slim Pointed Tips

Bent Square Tips

Curved Square Tips

Grip small objects without applying any pressure—the tips on these tweezers open when you squeeze them and close when you release. Swiss made to tight tolerances, they have the perfect tip alignment required for work under magnification. They’re 300 series stainless steel, so they have excellent corrosion resistance but their tips are less durable than those made of 400 series stainless. Commonly known as anti-magnetic tweezers, they are typically nonmagnetic but may become slightly magnetic with use.

Slim Tip—Tweezers with slim tips allow more visibility of your work than standard tips.

Curved Tip—Tweezers with curved tips reach over and around obstructions.

Bent Tip—Tweezers with bent tips reach over and around obstructions. They also have square ends for placing chips and electronic components on circuit boards. Also known as SMD (surface-mount device) tweezers.

Pointed Tip—Tweezers with pointed tips firmly grip an object but may nick or mar its surface.

Round Tip—Tweezers with round tips won’t mar or nick components. However, they don’t hold objects as well as pointed tips.

	Tip
	Wd.	Thk.	Angle	Overall Lg.	Tweezer Trade No.	Jaw Texture	Grip Style	Appearance	Performance		Each
Standard Pointed Tips







				300 Series Stainless Steel

				0.004"	0.004"	—	4 1/4"	4	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N13	000000


				0.007"	0.004"	—	4 3/4"	3	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N12	00000


				Standard Round Tips







								300 Series Stainless Steel

								0.075"	0.005"	—	4 3/4"	2A	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N11	00000


								Slim Pointed Tips







												300 Series Stainless Steel

												0.004"	0.004"	—	4 1/4"	5	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N14	00000


												Bent Square Tips







																300 Series Stainless Steel

																0.028"	0.014"	10°	4 1/2"	SM104	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N16	00000


																Curved Square Tips







																				300 Series Stainless Steel

0.009"																				0.007"	45°	4 1/2"	7	Smooth	Plain	Polished	High Precision, Squeeze to Open	4623N15	00000

Squeeze-to-Open Tweezers


Standard Round Tips and Plain Grip	Standard Round Tips and Hard Fiber Grip

Standard Trapezoidal Tips and Knurled Grip	Standard Square Tips and Plain Grip

Offset Round Tips and Plain Grip	Bent Round Tips and Hard Fiber Grip

Hold small parts without the need to apply pressure. Squeeze these tweezers to open the tips and release to close them.

Offset Tip—Tweezers with offset tips keep whatever object they’re holding elevated when they’re set down on a surface. This is useful if you need both hands free.

Bent Tip—Tweezers with bent tips reach over and around obstructions.

Round Tip—Tweezers with round tips won’t mar or nick components. However, they don’t hold objects as well as pointed tips.

Square Tip—Tweezers with square tips are wide and flat for a good grip on thin sheets and labels.

Trapezoidal Tip—Tweezers with trapezoidal tips give you a good grip on large, flat components.

Hard Fiber Grip—Tweezers with hard fiber grip insulate against heat.

Plastic-Coated Tip—Plastic-coated steel tweezers won’t mar delicate components.

400 Series Stainless Steel—400 series stainless steel tweezers have good corrosion resistance and are mildly magnetic.

	Tip
	Wd.	Thk.	Angle	Finish	Overall Lg.	Material	Max. Temp., ° F	Jaw Texture	Appearance	Performance		Each
Standard Round Tips and Plain Grip



		0.060"	0.030"	—	—	4 1/2"	400 Series Stainless Steel	—	Serrated	Polished	Squeeze to Open	5799A12	00000


		0.160"	0.120"	—	Plastic Coated	6 1/2"	Steel	—	Smooth	Polished	Squeeze to Open	5799A103	00000


		Standard Round Tips and Hard Fiber Grip



				0.030"	0.047"	—	—	6 1/2"	400 Series Stainless Steel	400	Smooth	Polished	Heat Resistant, Squeeze to Open	7007A73	0000


				Standard Trapezoidal Tips and Knurled Grip



						0.177"	0.051"	—	—	6 1/4"	Steel	—	Serrated	Polished	Squeeze to Open	5799A101	00000


						Standard Square Tips and Plain Grip



								0.142"	0.035"	—	—	6 1/2"	400 Series Stainless Steel	—	Serrated	Polished	Squeeze to Open	5799A14	0000


								Offset Round Tips and Plain Grip



										0.185"	0.067"	—	—	5 1/2"	400 Series Stainless Steel	—	Serrated	Polished	Squeeze to Open	5799A102	0000


										Bent Round Tips and Hard Fiber Grip



												0.051"	0.055"	30°	—	6 1/2"	400 Series Stainless Steel	400	Smooth	Polished	Heat Resistant, Squeeze to Open	7007A74	0000

Trigger-Action Bar Clamps/Spreaders

Shown as Spreader

Image of Product. Front orientation. Contains Annotated. Bar Clamps. Trigger-Action Bar Clamps/Spreaders.

Reverse the arms to use these clamps as spreaders. Press the trigger to slide the clamping arm along the bar. Release the trigger and squeeze the pistol-grip handle to lock the clamp in place.

	Opening		Spreader Opening
	Max.	Min.	Max.	Min.	Reach Lg.	Body Material		Each
300 lb. Holding Capacity



		6"	0"	12 1/2"	7 1/2"	2 1/4"	Steel	51755A6	000000


		12"	0"	18 1/2"	7 1/2"	2 1/4"	Steel	51755A7	00000
		18"	0"	24 1/2"	7 1/2"	2 1/4"	Steel	51755A11	00000
		24"	0"	30 1/2"	7 1/2"	2 1/4"	Steel	51755A12	00000
		36"	0"	42 1/2"	7 1/2"	2 1/4"	Steel	51755A13	00000


		600 lb. Holding Capacity



				6"	0"	14 7/8"	9 1/4"	3 5/8"	Steel	51755A21	00000


				12"	0"	20 1/2"	9"	2 3/4"	Steel	51755A22	00000
				18"	0"	26 1/2"	9"	2 3/4"	Steel	51755A23	00000
				24"	0"	32 1/2"	9"	2 3/4"	Steel	51755A24	00000
				36"	0"	44 1/2"	9"	2 3/4"	Steel	51755A25	00000
				50"	0"	58 1/2"	9"	2 3/4"	Steel	51755A26	00000

Fast-Action Bar Clamps/Spreaders


Shown as Spreader

Each arm slides freely for quick, one-handed positioning. They lock when the screws are tightened onto a workpiece. Reverse the arms to use these clamps as spreaders.

Opening		Spreader Opening
Max.	Min.	Max.	Min.	Reach Lg.	Holding Cap., lb.	Body Material	Screw Material		Each
16"	0"	30"	13 1/2"	4 3/4"	1,450	Steel	Black-Oxide Steel	2479N11	0000000
39 1/2"	0"	49"	13 1/2"	4 3/4"	1,450	Steel	Black-Oxide Steel	2479N12	000000
60"	0"	68"	13 1/2"	4 3/4"	1,450	Steel	Black-Oxide Steel	2479N13	000000

Parallel-Jaw Bar Clamps/Spreaders


	Shown as Spreader

The large, flat jaws remain parallel when clamping to apply even pressure without denting or marring the workpiece. Reverse the arms to use these clamps as spreaders. Pull the handle to lock or release the clamping arm.

Opening		Spreader Opening
Max.	Min.	Max.	Min.	Reach Lg.	Holding Cap., lb.	Body Material	Arm Material	Screw Material		Each
12"	0"	15 5/16"	10 1/2"	3 3/4"	1,000	Steel	Plastic	Steel	5022A11	000000
18"	0"	21 1/2"	10 1/2"	3 3/4"	1,000	Steel	Plastic	Steel	5022A13	00000
24"	0"	28 3/4"	10 1/2"	3 3/4"	1,000	Steel	Plastic	Steel	5022A15	00000
40"	0"	44 1/2"	10 1/2"	3 3/4"	1,000	Steel	Plastic	Steel	5022A17	00000
50"	0"	52 1/2"	10 1/2"	3 3/4"	1,000	Steel	Plastic	Steel	5022A18	00000

Squeeze-to-Open Tweezers Sets


6 1/2" Lg. with Bent Round Tips	6 1/2" Lg. with Standard Round TIps

4 1/2" Lg. with Standard Round TIps	6 1/2" Lg. with Standard Square Tips

These assorted tweezers hold small parts without the need to apply pressure. Squeeze to open the tips and release to close them. Tweezers are made of 400 series stainless steel, which has good corrosion resistance and is mildly magnetic.

	Includes	Jaw Texture	Grip Style	Appearance	Container Type		Each
400 Series Stainless Steel



	4	4 1/2" O'all Lg. Tweezers with 0.060" Wd. × 0.030" Thick. Round Tips 6 1/2" O'all Lg. Tweezers with 0.030" Wd. × 0.047" Thick. Round Tips 6 1/2" O'all Lg. Tweezers with 0.051" Wd. × 0.055" Thick. 30° Bent, Round Tips 6 1/2" O'all Lg. Tweezers with 0.142" Wd. × 0.035" Thick. Square Tips	Smooth, Serrated	Plain	Polished	Plastic Pouch	7007A81	000000

Inside Diameter Fixture Clamps for Castings and Rough Parts

These clamps wedge against the workpiece ID to grip cast, unfinished, or uneven parts, leaving the outside clear for machining. Do not use these clamps on smooth or finished ID’s because they will leave a mark. The clamp’s screw tightens from the top of the clamp, so workpieces require a through hole. Thread the clamp into a tapped hole in your fixture and place your workpiece over it. Reach through the hole to turn the screw, expanding the clamp.

					Thread		Drive
For ID Range	Max. Clamp Expansion	Overall Ht.	Body Ht.	Max. Clamping Force, lbf	Size	Lg., mm	Size, mm	Style	Mounting Fasteners Included	Material	Screw Material		Each



	0.768" to 0.945"	0.178"	29/64"	23/64"	450	M4 × 0.7 mm	12	3	Hex	Yes	Steel	Steel	3071N11	000000


	0.925" to 1.142"	0.217"	43/64"	33/64"	1,120	M6 × 1 mm	18	5	Hex	Yes	Steel	Steel	3071N12	00000
	1.122" to 1.417"	0.295"	7/8"	43/64"	2,000	M8 × 1.25 mm	25	6	Hex	Yes	Steel	Steel	3071N13	00000

Pipe Welding Clamps

Internal

Clamping—Self-Centering

Hold pipe and fittings together for tack welding. These clamps can be used to weld two pipes of similar or different diameters, or they can be used to weld a pipe to a flange. With a rugged build, they’re designed for use with heavy pipe.

Internal Clamping—Internal clamps don’t obstruct welding, making the process faster and simpler. One side of these two-part clamps expands with a knob while the other expands with a hand bar, so you can set them at different diameters to join pipe and flanges of varying sizes.

Self-Centering—Self-centering clamps consist of two clamps that share a center line even as you attach each to a different piece of pipe, so the pipes stay aligned with no manual adjustment needed.

	For Pipe		Stainless Steel Body
	OD	Size		Each
Internal Clamping—Self-Centering



		2" to 6"	2 to 5	2530N15	0000000


		4" to 8"	3 1/2 to 7	2530N16	000000
		6" to 14"	6 to 14	2530N17	00000000

Inside Diameter Fixture Clamps


Top Actuation	Side Actuation

Secure a workpiece from the inside diameter, leaving the outside clear for machining. Machine these clamps to match the precise size and contours of your workpiece ID. Mount the clamp to your fixture with the included screws and place your workpiece over it. Turn the socket head cap screw to expand the clamp.

Top Actuation—Top-actuated clamps tighten from the top of the clamp, so workpieces need a through hole.

Side Actuation—Side-actuated clamps tighten from the side of the clamp, gripping parts without a through hole in the top.

						Thread		Drive
	For ID Range	Max. Clamp Expansion	Ht.	Flange OD	Max. Clamping Force, lbf	Size	Lg.	Size	Style	Mounting Fasteners Included	No. of Mounting Holes	Material	Screw Material		Each
Top Actuation



		0.16" to 0.29"	0.005"	27/64"	25/32"	250	2-56	1/2"	5/64"	Hex	Yes	3	Steel	Steel	1341N11	000000


		0.28" to 0.49"	0.01"	55/64"	1 11/64"	950	8-32	1"	9/64"	Hex	Yes	3	Steel	Steel	1341N12	00000
		0.48" to 0.56"	0.013"	63/64"	1 15/64"	1,900	1/4"-20	1 1/4"	3/16"	Hex	Yes	3	Steel	Steel	1341N13	00000
		0.53" to 0.79"	0.015"	63/64"	1 15/32"	2,500	5/16"-18	1 1/4"	1/4"	Hex	Yes	3	Steel	Steel	1341N14	00000
		0.71" to 1.06"	0.015"	1 1/8"	1 31/32"	4,500	3/8"-16	1 1/2"	5/16"	Hex	Yes	3	Steel	Steel	1341N15	00000
		0.9" to 1.39"	0.015"	1 1/4"	2 13/64"	5,900	1/2"-13	1 1/2"	3/8"	Hex	Yes	3	Steel	Steel	1341N16	00000
		1.15" to 1.65"	0.015"	1 9/16"	2 47/64"	10,000	5/8"-11	1 3/4"	1/2"	Hex	Yes	3	Steel	Steel	1341N17	000000
		1.15" to 2.03"	0.015"	1 9/16"	2 31/32"	10,000	5/8"-11	1 3/4"	1/2"	Hex	Yes	3	Steel	Steel	1341N18	000000
		1.15" to 3.06"	0.015"	1 51/64"	4 15/64"	10,000	5/8"-11	2"	1/2"	Hex	Yes	3	Steel	Steel	1341N19	000000
		1.15" to 4.06"	0.015"	1 51/64"	5 15/64"	10,000	5/8"-11	2"	1/2"	Hex	Yes	3	Steel	Steel	1341N22	000000
		1.15" to 6.89"	0.02"	1 51/64"	5 15/64"	10,000	5/8"-11	2"	1/2"	Hex	Yes	4	Steel	Steel	1341N23	000000


		1.15" to 9.85"	0.08"	1 51/64"	6"	6,000	5/8"-11	2"	1/2"	Hex	Yes	4	Aluminum	Steel	1341N24	000000
		4.1 mm to 7.4 mm	0.13 mm	10.7 mm	20 mm	250	M2 × 0.4 mm	12 mm	1.5 mm	Hex	Yes	3	Steel	Steel	1341N311	00000
		7.1 mm to 12.4 mm	0.25 mm	21.8 mm	29.72 mm	950	M4 × 0.7 mm	25 mm	3 mm	Hex	Yes	3	Steel	Steel	1341N312	00000
		12.2 mm to 14.2 mm	0.33 mm	24.9 mm	31.5 mm	1,900	M6 × 1 mm	30 mm	5 mm	Hex	Yes	3	Steel	Steel	1341N313	00000
		13.5 mm to 20 mm	0.38 mm	24.9 mm	37.5 mm	2,500	M8 × 1.25 mm	30 mm	6 mm	Hex	Yes	3	Steel	Steel	1341N314	00000
		18 mm to 27 mm	0.38 mm	28.6 mm	50 mm	4,500	M10 × 1.5 mm	35 mm	8 mm	Hex	Yes	3	Steel	Steel	1341N315	00000
		23 mm to 35.3 mm	0.38 mm	31.8 mm	56 mm	5,900	M12 × 1.75 mm	40 mm	10 mm	Hex	Yes	3	Steel	Steel	1341N316	00000
		29.3 mm to 42 mm	0.38 mm	39.6 mm	69.5 mm	10,000	M16 × 2 mm	45 mm	14 mm	Hex	Yes	3	Steel	Steel	1341N317	000000
		29.3 mm to 51.5 mm	0.38 mm	39.6 mm	75.5 mm	10,000	M16 × 2 mm	45 mm	14 mm	Hex	Yes	3	Steel	Steel	1341N318	000000
		29.3 mm to 77.7 mm	0.38 mm	45.5 mm	107.5 mm	10,000	M16 × 2 mm	50 mm	14 mm	Hex	Yes	3	Steel	Steel	1341N319	000000


		Side Actuation



				0.71" to 1.12"	0.012"	1 5/8"	1 31/32"	4,000	—	—	1/4"	Hex	Yes	6	Steel	Steel	1341N21	000000