3/4"-10 Plungers | McMaster-Carr

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27 Products

Knob-Grip Retractable Spring Plungers

With the most versatile handle we offer, these fit in tight spaces while still giving you something to grab. A tug retracts the nose so you can make controlled adjustments. Use these spring plungers for everything from positioning workpieces to changing the height of tables and platforms.

Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.

316 Stainless Steel Nose—With the best corrosion resistance of all, 316 stainless steel stands up to harsh weather, salt water, and chemicals. The nose is strong enough for most jobs, but won't withstand stress and vibration as well as steel.

Brass Nose—Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. Since brass is softer than other metals, these noses are less likely to dent surfaces, however, they could deform under high stress.

Acetal Nose—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These noses are extra soft to avoid scratching delicate surfaces. They are best for use on soft materials, such as aluminum.

Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.

			Nose		Nose Force, lbf		Body		Handle		Nonlocking		Twist-to-Lock
	Thread Size	Thread Lg.	Extended Lg.	Dia.	Extended	Compressed	Material	Lg.	Material	Dia.		Each		Each
Steel Nose



		3/4"-10	1.13"	0.45"	0.375"	1.5	16	Black-Oxide Steel	2.15"	Steel	1 1/2"	———	0	0000000	000000


		3/4"-10	1.13"	0.45"	0.375"	1.5	16	Zinc-Plated Steel	2.15"	Steel	1 1/2"	———	0	000000000	00000
		3/4"-10	1.2"	0.45"	0.375"	1.5	16	Zinc-Plated Steel	2"	Steel	1 1/2"	00000000	000000	———	0


		18-8 Stainless Steel Nose



				3/4"-10	1.13"	0.45"	0.375"	1.5	16	18-8 Stainless Steel	2.15"	18-8 Stainless Steel	1 1/2"	———	0	00000000	00000


				316 Stainless Steel Nose



						3/4"-10	1.13"	0.45"	0.375"	1.5	16	316 Stainless Steel	2.15"	316 Stainless Steel	1 1/2"	———	0	0000000	00000


						3/4"-10	1.2"	0.45"	0.375"	1.5	16	316 Stainless Steel	2.01"	316 Stainless Steel	1 1/2"	0000000	00000	———	0


						Brass Nose



								3/4"-10	1"	0.45"	0.375"	1.5	16	Brass	2.01"	Brass	1 1/2"	0000000	00000	———	0


								3/4"-10	1.13"	0.45"	0.375"	1.5	16	Brass	2.15"	Brass	1 1/2"	———	0	0000000	00000
								3/4"-10	1.2"	0.45"	0.375"	1.5	16	Brass	2.01"	Brass	1 1/2"	0000000	00000	———	0


								Acetal Nose



										3/4"-10	1.13"	0.45"	0.375"	1.5	16	18-8 Stainless Steel	2.15"	18-8 Stainless Steel	1 1/2"	———	0	0000000	00000

Ring-Grip Retractable Spring Plungers

Spring Plunger

Loop a lanyard through the ring to secure these spring plungers to machinery and prevent accidental drops. Pull the ring back to manually retract the nose and position, align, and lock components as needed for your job.

Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

			Nose		Nose Force, lbf		Body		Handle		Nonlocking		Twist-to-Lock
	Thread Size	Thread Lg.	Extended Lg.	Dia.	Extended	Compressed	Material	Lg.	Material	Dia.		Each		Each
Steel Nose



		3/4"-10	0.88"	0.5"	0.437"	1.5	6	Zinc-Plated Steel	1.5"	Steel	1 1/8"	0000000	000000	———	0


		18-8 Stainless Steel Nose



				3/4"-10	0.88"	0.5"	0.437"	1.5	6	18-8 Stainless Steel	1.5"	18-8 Stainless Steel	1 1/8"	0000000	00000	———	0


				316 Stainless Steel Nose



						3/4"-10	0.88"	0.5"	0.437"	1.5	6	316 Stainless Steel	1.5"	316 Stainless Steel	1 1/8"	0000000	00000	0000000	000000


						3/4"-10	2.69"	0.65"	0.43"	5	10	316 Stainless Steel	4.06"	316 Stainless Steel	1.4"	0000000	00000	0000000	00000


						Brass Nose



								3/4"-10	0.88"	0.5"	0.437"	1.5	6	Brass	1.5"	Steel	1 1/8"	0000000	00000	0000000	00000


								3/4"-10	2.69"	0.65"	0.43"	5	10	Brass	4.06"	Steel	1.4"	0000000	00000	0000000	00000

Long-Nose Spring Plungers

Lock heavy moving parts securely in place. Often used in indexing applications, these have a longer nose than ball-nose spring plungers to withstand greater side forces without disengaging. The nose compresses when a part presses against it, and then pops out into deep notches or grooves for a strong hold.

Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

	Spring Plungers											Spring Plunger Drivers
		Nose			Nose Force, lbf		Body
	Thread Size	Extended Lg.	Wd.	Dia.	Extended	Compressed	Material	Lg.	Drive Style		Each		Each
Steel Nose



		3/4"-10	0.312"	—	0.374"	4	16	Black-Oxide Steel	1.75"	Spring Plunger Driver	0000000	000000	0000000	000000


		3/4"-10	0.313"	—	0.374"	6.7	37.3	Black-Oxide Steel	1.75"	Spring Plunger Driver	0000000	00000	0000000	00000
		3/4"-10	0.313"	0.375"	—	6.7	37.3	Black-Oxide Steel	1.75"	External Hex	0000000	00000	———	0


		18-8 Stainless Steel Nose



				3/4"-10	0.313"	—	0.374"	6.7	37.3	18-8 Stainless Steel	1.75"	Spring Plunger Driver	00000000	00000	0000000	00000


				3/4"-10	0.313"	—	0.374"	6.7	37.3	Black-Oxide Steel	1.75"	Spring Plunger Driver	0000000	00000	0000000	00000

Long-Nose Spring Plungers For Ejecting

Punch large parts free from presses or dies with a nose that’s three times longer than others. These spring plungers also have a long spring that doesn’t need to compress as far to retract the nose, so it can handle high speed, repetitive ejecting jobs without wearing down.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

		Nose		Nose Force, lbf		Body
	Thread Size	Extended Lg.	Wd.	Extended	Compressed	Material	Lg.	Drive Style		Each
Steel Nose



		3/4"-10	1"	0.375"	4	35	Black-Oxide Steel	3.75"	External Hex	00000000	000000

Spring Plunger Drivers

Install spring plungers from the nose end without depressing the nose.

	For Spring Plunger Nose Type		Each
Steel



	3/4"-10	Ball, Long	0000000	000000

Vacuum Cups


Female	Female

Use cups with a vacuum system to grip, lift, and move flat materials, such as sheet metal and plastic. Cups with diameters larger than 5 _1/2" have threaded mounting holes in addition to the threaded air port.

Warning: Never use to lift people or items over people.

Buna-N Cups—Buna-N cups are abrasion resistant and have better oil resistance than vinyl plastic cups.

								Temp., ° F		Female
	Wt. Cap. @ Vacuum	Cup Dia.	Compressed Cup Ht.	Cup Ht.	Pipe Size	Thread Type	For Use With	Min.	Max.	Overall Ht.		Each
For Smooth Surfaces







				Buna-N Cups

				275 lb. @ 24 in. Hg	10.00"	0.94"	1.40"	3/8	NPT	Sheet Metal, Plastic	-40	230	1.96"	00000000	0000000