M16 Plungers | McMaster-Carr

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34 Products

Ball-Nose Spring Plungers

Align, position, and lock moving parts for most machining and assembly tasks. These spring plungers have a spring-loaded ball that compresses when a part presses against it, and then pops out into a notch or groove to hold the part in place. Unlike long-nose spring plungers, the ball rolls easily in and out of position, so they're a great fit for applications that require consistent, smooth movement, such as positioning parts in an assembly line and aligning fixtures and jigs when cutting or drilling.

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.

440C Stainless Steel Nose—The strongest, most wear-resistant stainless steel noses, these grind against hard metal surfaces without denting or scratching. However, they are not as corrosion resistant as 316 stainless steel.

Nylon Nose—Extra soft to avoid scratching delicate surfaces. Nylon is best for use on soft materials, such as aluminum. It will swell and weaken when exposed to moisture, however, so it should only be used in dry environments.

	Spring Plungers											Spring Plunger Drivers
		Nose, mm		Nose Force, lbf		Body		Drive Style
	Thread Size	Extended Lg.	Dia.	Extended	Compressed	Material	Lg., mm	Front	Back		Each		Each
440C Stainless Steel Nose



		M16 x 2 mm	2.4	9.5	4.4	8.8	18-8 Stainless Steel	25.4	Spring Plunger Driver	Slotted	85015A43	000000	3382A18	000000


		M16 x 2 mm	2.4	9.5	4.4	8.8	Steel	25.4	Spring Plunger Driver	Slotted	3391A48	00000	3382A18	00000
		M16 x 2 mm	3.5	10	9.2	19.3	18-8 Stainless Steel	24	Spring Plunger Driver	Slotted	85015A34	00000	3382A18	00000
		M16 x 2 mm	3.5	10	9.2	19.3	Black-Oxide Steel	24	Spring Plunger Driver	Slotted	3391A68	00000	3382A18	00000
		M16 x 2 mm	3.5	10	15.3	32	18-8 Stainless Steel	24	Spring Plunger Driver	Slotted	85015A35	00000	3382A18	00000
		M16 x 2 mm	3.5	10	15.3	32	Zinc Yellow-Chromate Plated Steel	24	Spring Plunger Driver	Slotted	3391A69	00000	3382A18	00000


		Nylon Nose



				M16 x 2 mm	3.5	10	9.2	19.3	18-8 Stainless Steel	24	Spring Plunger Driver	Slotted	2277A68	00000	3382A18	00000


				M16 x 2 mm	3.5	10	9.2	19.3	Steel	24	Spring Plunger Driver	Slotted	2191A28	00000	3382A18	00000
				M16 x 2 mm	3.5	10	15.3	32	18-8 Stainless Steel	24	Spring Plunger Driver	Slotted	2277A69	00000	3382A18	00000
				M16 x 2 mm	3.5	10	15.3	32	Steel	24	Spring Plunger Driver	Slotted	2191A29	00000	3382A18	00000

Spring Plunger Drivers

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

	For Spring Plunger Nose Type		Each
Steel



	5/8"-11, M16	Long	3382A18	000000

T-Handle Retractable Spring Plungers

With the widest grip, T-handles give you the most leverage of all our handles and are the easiest to grab with gloved or slippery hands. A tug manually retracts the nose so you can do everything from latching heavy, frequently-accessed doors to locking large cutting blades in place.

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.

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



		M16 x 2 mm	43	16	9.5	2.5	5	Zinc-Plated Steel	60	Steel	64	31265A39	000000


		18-8 Stainless Steel Nose



				M16 x 2 mm	43	16	9.5	2.5	5	18-8 Stainless Steel	60	18-8 Stainless Steel	64	31265A17	00000

L-Handle Retractable Spring Plungers

The L-handle on these spring plungers takes up less space than a T-handle and swivels to avoid obstacles. Pull it 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, mm		Nose Force, lbf		Body		Handle			Nonlocking		Twist-to-Lock
	Thread Size	Thread Lg., mm	Extended Lg.	Dia.	Extended	Compressed	Material	Lg., mm	Material	Lg., mm	Drive Style		Each		Each
Steel Nose



		M16 x 2 mm	32	13	9.7	0.8	2.5	Zinc-Plated Steel	48	Steel	30	External Hex	8498A54	000000	———	0


		M16 x 2 mm	51	25	9.5	1	5	Zinc-Plated Steel	77	Steel	33	External Hex	8498A58	00000	———	0
		M16 x 2 mm	51	25.4	9.7	1	5	Zinc-Plated Steel	78	Steel	36	External Hex	———	0	8501A81	000000


		18-8 Stainless Steel Nose



				M16 x 2 mm	32	13	9.7	0.8	2.5	18-8 Stainless Steel	48	18-8 Stainless Steel	30	External Hex	8690A23	00000	———	0


				M16 x 2 mm	51	25	9.5	1	5	18-8 Stainless Steel	77	18-8 Stainless Steel	33	External Hex	8690A27	00000	———	0
				M16 x 2 mm	51	25.4	9.7	1	5	18-8 Stainless Steel	78	18-8 Stainless Steel	36	External Hex	———	0	8501A84	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.

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.

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



		M16 x 2 mm	8	7.87	10.4	25.3	Black-Oxide Steel	38	Spring Plunger Driver	84995A14	000000	3382A18	000000


		18-8 Stainless Steel Nose



				M16 x 2 mm	8	7.87	10.4	25.3	18-8 Stainless Steel	38	Spring Plunger Driver	8502A11	00000	3382A18	00000


				Acetal Nose



						M16 x 2 mm	5	7.5	10	22.5	18-8 Stainless Steel	32	Spring Plunger Driver	8339A18	00000	3382A18	00000


						M16 x 2 mm	5	7.5	10	22.5	Black-Oxide Steel	32	Spring Plunger Driver	8281A18	00000	3382A18	00000
						M16 x 2 mm	5	7.8	10.5	16.9	18-8 Stainless Steel	38.1	Spring Plunger Driver	8339A24	00000	3382A18	00000
						M16 x 2 mm	5	7.8	10.5	16.9	Black-Oxide Steel	38.1	Spring Plunger Driver	8281A24	0000	3382A18	00000

Sanitary Retractable Spring Plungers

With rounded edges and polished surfaces, these spring plungers are free of nooks and crannies where dirt, water, and bacteria could collect. The seal on the base keeps contaminants off the threads and is bright blue, so you can easily spot broken pieces that fall into your line. A tug of the knob manually retracts the nose so you can do everything from positioning containers on an assembly line to locking mixing blades in place. Spring plungers are FDA compliant for direct contact with food.

316 Stainless Steel Nose—Won't corrode from frequent washdowns with harsh cleaners and detergents.

	Spring Plungers													Replacement Seals
			Nose, mm		Nose Force, lbf		Body		Handle			Twist-to-Lock
	Thread Size	Thread Lg., mm	Extended Lg.	Dia.	Extended	Compressed	Material	Lg., mm	Material	Dia., mm	Seal Material		Each		Each
316 Stainless Steel Nose



		M16 x 1.5 mm	12	8	8	5	7.2	316 Stainless Steel	66	316 Stainless Steel	35	Buna-N	97158A120	0000000	97158A150	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, mm		Nose Force, lbf		Body		Handle		Twist-to-Lock
	Thread Size	Thread Lg., mm	Extended Lg.	Dia.	Extended	Compressed	Material	Lg., mm	Material	Dia., mm		Each
Steel Nose



		M16 x 2 mm	43	16	9.5	2.5	5	Zinc-Plated Steel	60	Steel	32	8487A42	000000


		18-8 Stainless Steel Nose



				M16 x 2 mm	43	16	9.5	2.5	5	18-8 Stainless Steel	60	18-8 Stainless Steel	32	8500A39	00000

Hex-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 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. The nose is also hexagonal—take a wrench to it to install with more torque and a better hold than you could get with other tools.

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



		M16 x 2 mm	25.4	7.9	4	20	Black-Oxide Steel	79.3	External Hex	33705A71	000000

Hex-Nose Spring Plungers

A hexagonal nose makes installation and removal a breeze. Use a wrench to tighten the nose for more torque and a better hold compared to other tools. Often used in indexing applications, these spring plungers lock heavy moving parts into place. Their nose is longer than ball-nose spring plungers' to withstand greater side forces without disengaging. It 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.

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



		M16 x 2 mm	8	8	10.5	25.4	Black-Oxide Steel	38.1	External Hex	3360A83	000000

Hole-Mount Push/Pull Toggle Clamps

Panel mount through a hole with the included nut, or drill and tap a hole to flush mount. A pushing or pulling motion holds workpieces from the side. These clamps secure in two positions—when the plunger is fully extended and when the plunger is fully retracted. The plunger is internally threaded to accommodate threaded holding screws and other threaded fixtures (not included).

18-8 Stainless Steel Body—Stainless steel clamps have good corrosion resistance.

		Plunger							When Clamped
	Holding Cap., lb.	Lg.	Travel	Shape	Dia.	Thread Location	Thread Size	Thread Lg., mm	Overall Ht.	Overall Lg.	Grip Style	Includes		Each
Push/Pull—Steel



		200	1 5/16"	3/4"	Round	3/8"	Internal	M6	16	3 1/8"	2 7/16"	Cushion	Mounting Nut	5093A42	000000


		Push/Pull—18-8 Stainless Steel



				200	1 5/16"	3/4"	Round	3/8"	Internal	M6	16	3 1/8"	2 7/16"	Cushion	Mounting Nut	5093A39	00000

Push/Pull Toggle Clamps

Push/Pull—Steel

Internal Plunger Thread

Plain Grip

Hold workpieces from the side.

Push/Pull Clamp—Push/pull clamps secure in two positions—when the plunger is fully extended and when the plunger is fully retracted. They have an internally threaded plunger to accommodate threaded holding screws and other threaded fixtures (not included).

		Plunger								When Clamped
	Holding Cap., lb.	Lg.	Ht.	Travel	Shape	Dia.	Thread Location	Thread Size	Thread Lg., mm	Overall Ht.	Overall Lg.	Grip Style		Each
Push/Pull—Steel



		16,000	3 3/8"	2 1/4"	3"	Round	1"	Internal	M16	51	4 27/32"	11 5/32"	Plain	5093A13	0000000