M12 Bumpers | McMaster-Carr

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54 Products

Load-Rated Reinforced Threaded-Stud Bumpers

Style 1

These bumpers are tested to ensure they'll support the load of your application. They'll bear the weight of everything from a 50-pound saw to a 5,000-pound air compressor. All have a metal base plate for added strength and a longer service life than all-rubber bumpers. No separate fasteners are needed—just twist them into a threaded hole.

Style 1

Natural Rubber—These bumpers absorb impact well enough for most applications. However, they're not for use outdoors and break down when exposed to oil and harsh chemicals.

Stainless Steel Stud—Unlike bumpers with steel studs, these handle repeated washdowns without corroding.

Steel Stud—Durable and economical, these are the choice for most jobs.

Hardness Rating—The harder the bumper, the better it withstands impact and abrasion over time. The softer the bumper, the more cushioning it provides for objects made of glass, soft metal, and other fragile materials. Bumpers with a medium rating offer a balance of impact resistance and cushioning.

	Thread
	Size	Lg., mm	OD, mm	Ht., mm	Max. Load, lb.	Hardness	Hardness Rating	Color	Temp., ° F	Nonmarking	For Use Outdoors		Each
Natural Rubber with Steel Stud and Base Plate



		M12 × 1.75 mm	37	75	25	2,170	Durometer 55A	Medium	Black	-40 to 170	No	No	00000000	000000


		M12 × 1.75 mm	37	75	25	4,670	Durometer 70A	Hard	Black	-40 to 170	No	No	00000000	00000
		M12 × 1.75 mm	37	75	40	1,500	Durometer 55A	Medium	Black	-40 to 170	No	No	00000000	00000
		M12 × 1.75 mm	37	75	40	2,060	Durometer 70A	Hard	Black	-40 to 170	No	No	00000000	00000
		M12 × 1.75 mm	37	75	50	980	Durometer 50A	Medium	Black	-10 to 150	No	No	000000000	00000
		M12 × 1.75 mm	37	75	50	3,040	Durometer 70A	Hard	Black	-40 to 170	No	No	00000000	00000


		Natural Rubber with Corrosion-Resistant Stainless Steel Stud and Base Plate



				M12 × 1.75 mm	37	75	25	2,170	Durometer 55A	Medium	Black	-40 to 170	No	No	00000000	00000

Load-Rated Reinforced Threaded-Hole Bumpers


Style 1	Style 2

These bumpers are tested to ensure they'll support the load of your application. They'll bear the weight of everything from a 50-pound saw to a 2,000-pound air compressor. All have a metal base plate for added strength and a longer service life than all-rubber bumpers. Twist them onto a threaded stud on your equipment, or pair them with your own stud to create a custom-length bumper.

Style 1

Natural Rubber—These bumpers absorb impact well enough for most applications. However, they're not for use outdoors and break down when exposed to oil and harsh chemicals.

	Thread
	Size	Dp., mm	OD, mm	Ht., mm	Max. Load, lb.	Hardness	Hardness Rating	Color	Temp., ° F	Nonmarking	For Use Outdoors		Each
Natural Rubber with Steel Base Plate



		M12 × 1.75 mm	12	75	30	1,770	Durometer 55A	Medium	Black	-40 to 170	Yes	No	00000000	000000


		M12 × 1.75 mm	12	75	40	1,010	Durometer 55A	Medium	Black	-20 to 150	Yes	No	000000000	00000
		M12 × 1.75 mm	12	75	40	2,060	Durometer 70A	Hard	Black	-40 to 170	Yes	No	00000000	00000
		M12 × 1.75 mm	12	75	50	980	Durometer 55A	Medium	Black	-20 to 150	Yes	No	000000000	00000


		Natural Rubber with Corrosion-Resistant Stainless Steel Base Plate



				M12 × 1.75 mm	12	75	30	1,770	Durometer 55A	Medium	Black	-40 to 170	Yes	No	00000000	00000


				M12 × 1.75 mm	12	75	40	1,010	Durometer 55A	Medium	Black	-20 to 150	Yes	No	000000000	00000

Style 2

Natural Rubber—These bumpers absorb impact well enough for most applications. However, they're not for use outdoors and break down when exposed to oil and harsh chemicals.

	Thread
	Size	Dp., mm	OD, mm	Ht., mm	Max. Load, lb.	Hardness	Hardness Rating	Color	Temp., ° F	Nonmarking	For Use Outdoors		Each
Natural Rubber with Steel Base Plate



		M12 × 1.75 mm	12	75	89	570	Durometer 70A	Hard	Black	-40 to 170	Yes	No	00000000	000000

Reinforced Threaded-Hole Bumpers

Style 1

With a metal core or base plate for added strength, these bumpers withstand repeated impacts for a longer service life than all-rubber bumpers. You can also use them as spacers, vibration dampers, and noise reducers. Twist them onto a threaded stud on your equipment, or pair them with your own stud to create a custom-length bumper.

Style 1

Multipurpose Neoprene—A good choice for oily equipment that's exposed to sunlight, rain, and ozone. These aren't as oil resistant as Buna-N bumpers, but they can be used outdoors.

Abrasion-Resistant Polyurethane Rubber—Our toughest rubber bumpers, they keep their shape even when knocked and scraped by metal and other abrasive materials. They're often used on industrial vehicles, conveyors, and heavy construction equipment.

	Thread
	Size	Dp., mm	OD, mm	Ht., mm	Hardness	Hardness Rating	Color	Temp., ° F	Core Material	Nonmarking	For Use Outdoors		Each
Multipurpose Neoprene



		M12 × 1.25 mm	13	32	32	Durometer 40A	Medium Soft	Black	-40 to 200	Steel	No	Yes	00000000	000000


		M12 × 1.25 mm	13	32	32	Durometer 75A	Hard	Black	-40 to 200	Steel	No	Yes	00000000	00000
		M12 × 1.75 mm	13	32	32	Durometer 70A	Hard	Black	-40 to 200	Steel	No	Yes	00000000	00000


		Abrasion-Resistant Polyurethane Rubber



				M12 × 1.25 mm	13	32	32	Durometer 40A	Medium Soft	Red	-40 to 200	Steel	No	Yes	0000000	00000


				M12 × 1.25 mm	13	32	32	Durometer 50A	Medium	Red	-40 to 200	Steel	No	Yes	00000000	00000
				M12 × 1.25 mm	13	32	32	Durometer 60A	Medium Hard	Red	-40 to 200	Steel	No	Yes	00000000	00000
				M12 × 1.25 mm	13	32	32	Durometer 85A	Hard	Red	-40 to 200	Steel	No	Yes	00000000	00000
				M12 × 1.75 mm	13	32	32	Durometer 40A	Medium Soft	Black	-40 to 200	Steel	No	Yes	00000000	00000
				M12 × 1.75 mm	13	32	32	Durometer 95A	Extra Hard	Black	-40 to 200	Steel	No	Yes	00000000	00000

Reinforced Threaded-Stud Bumpers

Style 1

With a metal core for added strength, these bumpers withstand repeated impacts for a longer service life than all-rubber bumpers. You can also use them as spacers, vibration dampers, and noise reducers. No separate fasteners are needed—just twist them into a threaded hole.

Style 1

Multipurpose Neoprene—A good choice for oily equipment that's exposed to sunlight, rain, and ozone. These aren't as oil resistant as Buna-N bumpers, but they can be used outdoors.

	Thread
	Size	Lg., mm	OD, mm	Ht., mm	Overall Ht., mm	Hardness	Hardness Rating	Color	Temp., ° F	Stud Material	Core Material	Nonmarking	For Use Outdoors		Each
Multipurpose Neoprene



		M12 × 1.75 mm	30	32	32	62	Durometer 40A	Medium Soft	Black	-40 to 200	Steel	Steel	Yes	Yes	00000000	000000


		M12 × 1.75 mm	30	32	32	62	Durometer 75A	Hard	Black	-40 to 200	Steel	Steel	Yes	Yes	00000000	00000


		Abrasion-Resistant Polyurethane Rubber



				M12 × 1.75 mm	30	32	32	62	Durometer 40A	Medium Soft	Red	-60 to 200	Steel	Steel	Yes	Yes	0000000	00000


				M12 × 1.75 mm	30	32	32	62	Durometer 80A	Hard	Red	-60 to 200	Steel	Steel	Yes	Yes	00000000	00000

Vibration-Damping Sandwich Mounts with Stud and Insert

Install these mounts between a threaded stud and a hole inside or under equipment. Our jack-of-all-trades option, they isolate vibration to protect circuit boards, air compressors, and everything in between. They also muffle noise so you can work or hold a conversation around buzzing and thumping machinery.

Natural Rubber About Natural Rubber

Image of Product. Front orientation. Vibration-Damping Mounts. Vibration-Damping Sandwich Mounts with Stud and Insert.

The most common choice, these mounts won't scuff or tear easily. They stay strong and flexible even under constant vibration and repeated movement.

Corrosion-Resistant 304 Stainless Steel Insert—Last longer than steel when exposed to water and mild chemicals.

								Thread						Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Lg.	Dp.	Hardness	Temp. Range, ° F	Color		1-24	25-99	100-Up
Zinc-Plated Steel Stud and Steel Insert



		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	1 1/4"	9/16"	Durometer 50A	-10 to 150	Black	0000000	000000	000000	000000


		Corrosion-Resistant 304 Stainless Steel Stud and Insert



				M12 × 1.75 mm	881	0.43"	165	0.43"	2 3/16"	2 15/16"	1 7/16"	7/16"	Durometer 50A	-10 to 150	Black	00000000	00000	00000	00000

Multipurpose Neoprene About Multipurpose Neoprene

Resist wear and tear well enough for most applications. They are UV resistant and won't break down when exposed to oil, grease, and gasoline, so they're a good choice for motors and pumps.

								Thread						Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Lg.	Dp.	Hardness	Temp. Range, ° F	Color		1-24	25-99	100-Up
Zinc-Plated Steel Stud and Steel Insert



		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	1 1/4"	9/16"	Durometer 50A	10 to 180	Black	0000000	000000	000000	000000

Vibration-Damping Sandwich Mounts with Studs

Install these mounts between two holes inside or under equipment. Our jack-of-all-trades option, they isolate vibration to protect circuit boards, air compressors, and everything in between. They also muffle noise so you can work or hold a conversation around buzzing and thumping machinery.

Natural Rubber About Natural Rubber

Image of Product. Front orientation. Vibration-Damping Mounts. Vibration-Damping Sandwich Mounts with Studs.

The most common choice, these mounts won't scuff or tear easily. They stay strong and flexible even under constant vibration and repeated movement.

Corrosion-Resistant 304 Stainless Steel Stud—Last longer than steel when exposed to water and mild chemicals.

													Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Thread Lg.	Hardness	Temp. Range, ° F	Color		1-24	25-99	100-Up
Zinc-Plated Steel Stud



		M12 × 1.75 mm	668	0.15"	199	0.31"	1 1/2"	3 1/8"	1 1/4"	Durometer 50A	-10 to 150	Black	0000000	000000	000000	000000


		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	1 1/4"	Durometer 50A	-10 to 150	Black	0000000	00000	00000	00000


		Corrosion-Resistant 304 Stainless Steel Stud



				M12 × 1.75 mm	1,100	0.43"	153	0.43"	2 3/16"	3 1/8"	1 7/16"	Durometer 50A	-10 to 150	Black	0000000	00000	00000	00000

Multipurpose Neoprene About Multipurpose Neoprene

Resist wear and tear well enough for most applications. They are UV resistant and won't break down when exposed to oil, grease, and gasoline, so they're a good choice for motors and pumps.

													Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Thread Lg.	Hardness	Temp. Range, ° F	Color		1-24	25-99	100-Up
Zinc-Plated Steel Stud



		M12 × 1.75 mm	668	0.15"	199	0.31"	1 1/2"	3 1/8"	1 1/4"	Durometer 50A	10 to 180	Black	0000000	000000	000000	000000


		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	1 1/4"	Durometer 50A	10 to 180	Black	0000000	00000	00000	00000

Vibration-Damping Swivel Leveling Mounts with Threaded Stud

With Cushion

A rubber cushion reduces vibration to protect components and extend your machine’s life. For mounting versatility, you can install them in either threaded holes or unthreaded through holes at the bottom of equipment.

304 Stainless Steel Base—The choice for most wet locations, these mounts can withstand repeated washdowns without corroding. However, they won't hold up to cleaning solutions that contain harsh chemicals like 316 stainless steel can.

Rubber Cushion—In addition to reducing vibration, the cushion grips surfaces so vibrating equipment doesn't slide. It also cuts down on noise and protects floors from scrapes and gouges.

					With Rubber Cushion
	Thread Size	Thread Lg.	Swivel Range of Motion	Base Dia.	Cap. per Mount, lb.	Deflection @ Cap.	Overall Ht.	Cushion Material		Each
304 Stainless Steel Base and Stud



		M12 × 1.75 mm	4 3/4"	7.5°	2 5/8"	500	0.07"	5 11/16"	Buna-N	0000000	000000


		M12 × 1.75 mm	4 3/4"	7.5°	3 7/8"	1,000	0.12"	6 1/8"	Buna-N	0000000	00000
		M12 × 1.75 mm	4 3/4"	7.5°	3 7/8"	2,000	0.12"	6 1/8"	Buna-N	0000000	00000

Shock-Absorbing Swivel Leveling Mounts with Threaded Stud

Absorb sudden impacts from heavy machinery, such as punch presses, die cutters, and generators that jolt as they power on. These mounts have a solid rubber base, similar to a hockey puck, that isolates shock to protect floors and equipment from damage. The base also cuts down on noise and grips the floor so equipment doesn't slide when it's vibrating. The ball-and-socket joint in the base swivels to compensate for slightly sloped and pitted floors. For mounting versatility, you can install these mounts in either threaded holes or unthreaded through holes at the bottom of equipment.

Square Neoprene Base with Zinc-Plated Steel Stud

Image of Product. Front orientation. Leveling Mounts. Shock-Absorbing Swivel Leveling Mounts with Threaded Stud, Square Base.

					Base
Thread Size	Thread Lg.	Cap. per Mount, lb.	Deflection @ Cap.	Swivel Range of Motion	Lg.	Wd.	Overall Ht.		Each
M12 × 1.75 mm	2 5/8"	350	0.13"	7.5°	3"	3"	3 7/16"	00000000	000000
M12 × 1.75 mm	2 5/8"	700	0.13"	7.5°	3"	3"	3 7/16"	00000000	00000

Round Neoprene Base with Zinc-Plated Steel Stud

Image of Product. Front orientation. Leveling Mounts. Shock-Absorbing Swivel Leveling Mounts with Threaded Stud, Round Base.

Thread Size	Thread Lg.	Cap. per Mount, lb.	Deflection @ Cap.	Swivel Range of Motion	Base Dia.	Overall Ht.		Each
M12 × 1.75 mm	2 3/8"	500	0.13"	7.5°	3"	3 11/16"	00000000	000000
M12 × 1.75 mm	2 3/8"	1,000	0.13"	7.5°	3"	3 11/32"	00000000	00000

Vibration-Damping Sandwich Mounts with Inserts

Install these mounts between studs inside or under equipment. Our jack-of-all-trades option, they isolate vibration to protect circuit boards, air compressors, and everything in between. They also muffle noise so you can work or hold a conversation around buzzing and thumping machinery. With reinforcing metal bonded to the rubber, they'll support weight whether mounted underneath equipment (Cap. per Mount) or side mounted (Shear Cap. per Mount).

Natural Rubber About Natural Rubber

Image of Product. Bottom orientation. Vibration-Damping Mounts. Vibration-Damping Sandwich Mounts with Inserts.

The most common choice, these mounts won't scuff or tear easily. They stay strong and flexible even under constant vibration and repeated movement.

Corrosion-Resistant 304 Stainless Steel-Insert—Last longer than steel when exposed to water and mild chemicals.

												Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Thread Dp.	Temp. Range, ° F	Color		1-24	25-99	100-Up
Steel-Insert



		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	9/16"	-10 to 150	Black	0000000	000000	000000	000000


		Corrosion-Resistant 304 Stainless Steel-Insert



				M12 × 1.75 mm	1,100	0.43"	220	0.43"	2 1/4"	3 1/8"	15/32"	-10 to 150	Black	00000000	000000	00000	00000

Multipurpose Neoprene About Multipurpose Neoprene

Resist wear and tear well enough for most applications. They are UV resistant and won't break down when exposed to oil, grease, and gasoline, so they're a good choice for motors and pumps.

												Each
	Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount, lb.	Deflection @ Shear Cap.	Ht.	Dia.	Thread Dp.	Temp. Range, ° F	Color		1-24	25-99	100-Up
Steel-Insert



		M12 × 1.75 mm	720	0.4"	140	0.3"	2 1/4"	3 1/8"	9/16"	10 to 180	Black	0000000	000000	000000	000000

Fail-Safe Vibration-Damping Bolt-Down Mounts

Threaded-Insert Mount

Avoid the cost and hassle of a mount suddenly giving out. Even if the rubber fails, the interlocking steel body holds up to maintain load support and minimize downtime while you find a replacement. These mounts absorb shock and vibration to extend the life of heavy machinery and prevent cracking in nearby equipment, floors, and walls.

Threaded-Insert Mount

Multipurpose Neoprene—A good choice for equipment that's exposed to sunlight, rain, and ozone. These mounts resist wear and tear well enough for most applications, but they aren't as oil resistant as Buna-N.

							Base			Mounting						Each
Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount	Deflection @ Shear Cap.	Overall Ht.	Dia.	Lg.	Wd.	Temp. Range, ° F	Fasteners Included	No. of Holes	Hole Dia.	Hole Ctr.-to-Ctr.	Base Material		1-24	25-99	100-Up







			Multipurpose Neoprene

			M12 × 1.75 mm	470	0.13"	Not Rated	Not Rated	1.78"	2.42"	5.5"	3.37"	10 to 180	No	2	0.51"	4.12"	Steel	000000000	000000	000000	000000


			M12 × 1.75 mm	715	0.13"	Not Rated	Not Rated	1.78"	2.42"	5.5"	3.37"	10 to 180	No	2	0.51"	4.12"	Steel	000000000	00000	00000	00000
			M12 × 1.75 mm	940	0.13"	Not Rated	Not Rated	1.78"	2.42"	5.5"	3.37"	10 to 180	No	2	0.51"	4.12"	Steel	000000000	00000	00000	00000
			M12 × 1.75 mm	1,064	0.13"	Not Rated	Not Rated	1.78"	2.42"	5.5"	3.37"	10 to 180	No	2	0.51"	4.12"	Steel	000000000	00000	00000	00000

Shock-Absorbing Air Spring Vibration-Damping Mounts

Neutralize shock and vibration from your machine no matter how hard it heaves or hammers. These mounts use air pressure rather than a steel frame to support a load. That means four times the deflection and vibration control of a typical bolt-down mount. Fill them with air and stick them under heavy machinery to keep floors intact, seals tight, and fasteners secure. They’ll also soak up the vibration from floors and mounting plates that bumps optical and other precision tools out of alignment.

Threaded-Insert Mount

Image of Product. Front orientation. Vibration-Damping Mounts. Shock-Absorbing Air Spring Vibration-Damping Mounts.

Multipurpose Neoprene—Resist wear and tear well enough for most applications. They are UV resistant and won't break down when exposed to oil, grease, and gasoline, so they're a good choice for motors and pumps.

								Base			Mounting					Air Inlet
Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount	Deflection @ Shear Cap.	Overall Ht.	Dia.	Ht.	Lg.	Wd.	Temp. Range, ° F	Fasteners Included	No. of Holes	Hole Dia.	Hole Ctr.-to-Ctr.	Max. Pressure, psi	Thread Size	Thread Type	Base Material		Each







			Multipurpose Neoprene

			M12 × 1.75 mm	300	0.5"	Not Rated	Not Rated	2.5"	4.14"	1.94"	4.19"	4.19"	-20 to 180	No	4	0.3"	3.5"	85	0.305"-32	Schrader	Aluminum	00000000	0000000


			M12 × 1.75 mm	550	0.5"	Not Rated	Not Rated	3.5"	5"	2.94"	5.13"	5.13"	-20 to 180	No	4	0.3"	4.25"	85	0.305"-32	Schrader	Aluminum	00000000	000000
			M12 × 1.75 mm	1,200	0.5"	Not Rated	Not Rated	3.5"	6.74"	2.94"	6.88"	6.88"	-20 to 180	No	4	0.3"	6"	85	0.305"-32	Schrader	Aluminum	00000000	000000

Vibration-Damping Bolt-Down Mounts

Style 6,

Threaded-Insert Mount

These mounts reduce vibration and noise while anchoring machinery from below. Bolt them to the bases of fans, pumps, and generators so vibration from moving components doesn't wear out parts, crack floors, and push equipment out of place.

Style 6—Threaded-Insert Mount

Style 6,

Threaded-Insert Mount

In addition to high load capacities, the wide, rigid mounting surface minimizes leaning and wobbling.

							Base			Mounting						Each
Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount	Deflection @ Shear Cap.	Overall Ht.	Dia.	Lg.	Wd.	Temp. Range, ° F	Fasteners Included	No. of Holes	Hole Dia.	Hole Ctr.-to-Ctr.	Base Material		1-24	25-99	100-Up







			Multipurpose Neoprene

			M12 × 1.75 mm	700	0.25"	Not Rated	Not Rated	1.61"	3.125"	5.125"	3"	-20 to 180	No	2	0.44"	4.125"	Steel	000000000	000000	000000	000000

Stay-Put Vibration-Damping Swivel Leveling Mounts with Threaded Stud

Bolt down machines so they don’t creep across the floor or tip over. These mounts have one or more holes for securing equipment that you don’t need to move. They also have a rubber cushion that reduces vibration to extend your machine’s life. The ball-and-socket joint in the base swivels to compensate for slightly sloped and pitted floors. For mounting versatility, you can install these mounts in either threaded holes or unthreaded through holes at the bottom of equipment.

One Offset Mounting Hole

Image of Product. Front orientation. Leveling Mounts. Stay-Put Vibration-Damping Swivel Leveling Mounts with Threaded Stud, One Offset Mounting Hole, With Cushion.

With Cushion

The mounting hole extends out from underneath your machine to give you more room to drill and install fasteners.

Rubber Cushion—In addition to reducing vibration, the cushion cuts down on noise and protects floors from scrapes and gouges.

					Mounting Holes		With Rubber Cushion
	Thread Size	Thread Lg.	Swivel Range of Motion	Base Dia.	Fasteners Included	Dia.	Cap. per Mount, lb.	Deflection @ Cap.	Overall Ht.	Cushion Material		Each
304 Stainless Steel Base and Stud



		M12 × 1.75 mm	4"	5°	2 15/16"	No	19/32"	1,770	Not Rated	4 7/8"	Buna-N	00000000	000000