M3 Bumpers | McMaster-Carr

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12 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


		M3 × 0.5 mm	6	8	8	8	Durometer 50A	Medium	Black	-10 to 150	No	No	000000000	00000
		M3 × 0.5 mm	6	8	8	30	Durometer 70A	Hard	Black	-40 to 170	No	No	00000000	0000
		M3 × 0.5 mm	6	8	13	11	Durometer 55A	Medium	Black	-40 to 170	No	No	00000000	0000
		M3 × 0.5 mm	6	8	13	30	Durometer 70A	Hard	Black	-40 to 170	No	No	00000000	0000

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


				M3 × 0.5 mm	6	8	8	8	Durometer 50A	Medium	Black	-10 to 150	No	No	000000000	0000
				M3 × 0.5 mm	6	8	13	11	Durometer 55A	Medium	Black	-40 to 170	No	No	00000000	0000

Load-Rated Reinforced Threaded-Hole 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 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


		M3 × 0.5 mm	3	8	8	7	Durometer 40A	Medium Soft	Black	-40 to 170	Yes	No	00000000	00000
		M3 × 0.5 mm	3	8	8	12	Durometer 55A	Medium	Black	-40 to 170	Yes	No	00000000	0000
		M3 × 0.5 mm	3	8	8	30	Durometer 70A	Hard	Black	-40 to 170	Yes	No	00000000	0000
		M3 × 0.5 mm	3	8	13	11	Durometer 55A	Medium	Black	-40 to 170	Yes	No	00000000	0000
		M3 × 0.5 mm	3	8	13	30	Durometer 70A	Hard	Black	-40 to 170	Yes	No	00000000	0000

		Natural Rubber with Corrosion-Resistant Stainless Steel Base Plate


				M3 × 0.5 mm	3	8	8	12	Durometer 55A	Medium	Black	-40 to 170	Yes	No	00000000	0000