McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    18 Products

    Reinforced Threaded-Hole Bumpers

    Image of Product. Front orientation. Bumpers. Reinforced Threaded-Hole Bumpers, Style 1.

    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.
    Abrasion-Resistant Polyurethane RubberAbout Abrasion-Resistant Polyurethane Rubber
    Image of Product. Front orientation. Bumpers. Reinforced Threaded-Hole Bumpers, Style 1.

    Style 1

    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.
    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
    Dp.,
    mm
    OD,
    mm
    Ht.,
    mm
    Hardness
    Hardness
    Rating
    Color
    Temp.,
    ° F
    Core
    Material
    Nonmarking
    For Use
    Outdoors
    Each
    Style 1
    M20 × 2.5 mm255757Durometer 95AExtra HardBlack-40 to 200SteelNoYes00000000000000
     

    Fail-Safe Vibration-Damping Bolt-Down Mounts

    Image of Product. Front orientation. Vibration-Damping Mounts. Fail-Safe Vibration-Damping Bolt-Down Mounts, Threaded-Insert Mount.

    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
    Image of Product. Front orientation. Vibration-Damping Mounts. Fail-Safe Vibration-Damping Bolt-Down Mounts, 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
    M20 × 2.5 mm9000.13"Not RatedNot Rated1.84"3.1"6.41"4.09"10 to 180No20.53"5"Steel000000000000000000000000000
     

    Adjustable Air Springs

    Isolate vibration and absorb shock from moving equipment, even with changing loads. Also for leveling and lifting, use compressed air to adjust air springs to the height and force required for your application. They’re often used with vibratory screen and conveyors; loading and transfer stations; and sensitive testing and measuring equipment. Do not extend beyond height at full stroke.
    Sleeve Air Spring
    Image of Product. Front orientation. Contains Annotated, MultipleImages. Air Springs. Sleeve Air Spring.
    Air Inlet
    Ht. @ Full
    Stroke
    Compressed
    Ht.
    Stroke
    Lg.
    Extended
    Ht.
    Full Stroke Lifting Force @ Pressure
    Beginning Stroke Lifting Force @ Pressure
    OD @ Full
    Stroke
    Temp. Range,
    ° F
    Air Spring
    Material
    Thread
    Type
    Gender
    Pipe
    Size
    Each
    12"4.1"6.8"10.9"240 lbf @ 20 psi
    700 lbf @ 60 psi
    1,200 lbf @ 100 psi    		420 lbf @ 20 psi
    1,100 lbf @ 60 psi
    2,000 lbf @ 100 psi    		7"-20 to 135Neoprene
    		NPTF
    		Female1/8
    		00000000000000

    Adjustable Shock Absorbers

    Turn the knob on these shock absorbers to change deceleration to suit varying loads and speeds. They counteract the energy of moving objects to prevent damage to equipment and material. They're commonly used in gantry systems, presses, and conveyor stops.
    Threaded-Body Mount
    Image of Product. Front orientation. Contains Annotated. Shock Absorbers. Adjustable Shock Absorbers, Threaded-Body Mount.
    Threaded-body mount shock absorbers use Mounting Blocks for Shock Absorbers (not included) for mounting. They include mounting nuts.
    Urethane Rubber Bumper—Urethane rubber bumpers are nonmarring.
    Body
    Rod
    Bumper
    Energy Cap.,
    in·lbf
    Max. Cycles
    per min., cpm
    Stroke
    Lg.
    Extended
    Lg.
    Compressed
    Lg.
    Dia.
    Thread Size
    Material
    Dia.
    Material
    Dia.
    Material
    Temp. Range,
    ° F
    Each
    Variable Adjustment
    275180.5"4.35"3.85"0.75"M20 × 1.5 mmAnodized Aluminum0.19"Nickel-Plated Steel0.5"Urethane Rubber32 to 15000000000000000
    300220.75"4.67"3.92"0.75"M20 × 1.5 mmBlack-Oxide Steel0.19"Stainless Steel0.66"Steel32 to 1500000000000000
     

    Self-Adjusting Shock Absorbers

    Accommodate changing loads and energy without manual adjustment. Shock absorbers counteract the energy of moving objects to prevent damage to equipment and material. They're often used in gantry systems, presses, and at stops along conveyors. Mounting nuts are included. Mounting Blocks for Shock Absorbers are sold separately.
    Threaded-Body Mount
    Image of Product. No Bumper. Front orientation. Contains Annotated. Shock Absorbers. Self-Adjusting Shock Absorbers, Threaded-Body Mount.
    Image of Product. Side2 orientation. Contains Annotated. Shock Absorbers. Self-Adjusting Shock Absorbers, Threaded-Body Mount, Aluminum Bumper.

    No Bumper

    Aluminum Bumper

    Image of Attribute. Front orientation. Contains Annotated. Shock Absorbers. Self-Adjusting Shock Absorbers, Threaded-Body Mount, Nylon Bumper.
    Image of Attribute. Front orientation. Contains Annotated. Shock Absorbers. Self-Adjusting Shock Absorbers, Threaded-Body Mount, Steel Bumper.

    Nylon Bumper

    Steel Bumper

    Aluminum Bumper—Aluminum bumpers are nonmagnetic.
    Nylon Bumper—Nylon bumpers are nonmarring.
    Body
    Rod
    Bumper
    Energy Cap.,
    in·lbf
    Max. Cycles
    per min., cpm
    Stroke
    Lg.
    Extended
    Lg.
    Compressed
    Lg.
    Dia.
    Thread Size
    Material
    Dia.
    Material
    Dia.
    Material
    Temp. Range,
    ° F
    Each
    200100.5"3.75"3.25"0.78"M20 × 1.5 mmBlack-Oxide Steel0.15"Stainless Steel0.25"Aluminum
    		-22 to 14000000000000000
    288230.5"4.07"3.57"0.78"M20 × 1.5 mmBlack-Oxide Steel0.25"Stainless Steel0.66"Nylon
    		32 to 1500000000000000
    300220.75"4.62"3.87"0.78"M20 × 1.5 mmBlack-Oxide Steel0.19"Stainless Steel0.66"Steel32 to 150000000000000
    360190.5"3.81"3.31"0.78"M20 × 1.5 mmBlack-Oxide Steel0.25"Stainless Steel——32 to 15000000000000000
     

    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.
    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
    M20 × 2.5 mm4 1/4"3,7000.13"7.5°5"5 7/8"000000000000000
    M20 × 2.5 mm4 1/4"8,0000.13"7.5°5"5 7/8"00000000000000

    Stay-Put Swivel Leveling Mounts with Threaded Stud and Offset Hole

    One or more offset mounting holes extend from underneath machines to give you more room to drill and install fasteners. These mounts bolt down to secure equipment that doesn’t need to move and prevent it from creeping or tipping. A 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.
    Round Base
    Image of Product. Front orientation. Leveling Mounts. Stay-Put Swivel Leveling Mounts with Threaded Stud and Offset Hole, Round Base, 1 Mounting Hole, With Cushion.

    1 Mounting Hole

    With Cushion

    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—A cushion under the base 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.
    Overall
    Ht.
    Cushion
    Material
    Each
    304 Stainless Steel Base and Stud
     
    1 Mounting Hole
    M20 × 2.5 mm6"5°2 15/16"No19/32"1,7706 7/8"Buna-N
    		00000000000000
     

    Sanitary Swivel Leveling Mounts with Threaded Stud

    Image of Product. Front orientation. Leveling Mounts. Sanitary Swivel Leveling Mounts with Threaded Stud, With Cushion.

    With

    Cushion

    With an extremely smooth finish, rounded edges, and a covered stud, these mounts are free of crevices where bacteria can grow. They have a silicone seal at the base of the thread cover that keeps contaminants out. The seal is made with chemical additives, so you can find it with an X-ray machine if it falls into your line. Mounts are certified by 3-A, EHEDG, and USDA to meet sanitary design standards. 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.
    With an extremely smooth finish, rounded edges, and a covered stud, these mounts are free of crevices where bacteria can grow. They have a silicone seal at the base of the thread cover that keeps contaminants out. The seal is made with chemical additives, so you can find it with an X-ray machine if it falls into your line. Mounts are certified by 3-A, EHEDG, and USDA to meet sanitary design standards. 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.
    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—A cushion under the base grips surfaces so vibrating equipment doesn't slide. It also protects floors from scrapes and gouges.
    With Rubber Cushion
    Thread Size
    Thread
    Lg.
    Mounting Ht.
    Swivel Range
    of Motion
    Base
    Dia.
    Food Industry Std.
    Cap. per
    Mount, lb.
    Overall
    Ht.
    Cushion
    Material
    Each
    304 Stainless Steel Base and Stud
    M20 × 2.5 mm4 1/8"5 1/2" to 8 1/16"10°3 1/8"3-A Certified 88-00, FDA Compliant 21 CFR 177.2600
    		3,3009 9/16"Buna-N
    		0000000000000
     

    Stay-Put Sanitary Swivel Leveling Mounts with Threaded Stud and Offset Hole

    Image of Product. Front orientation. Leveling Mounts. Stay-Put Sanitary Swivel Leveling Mounts with Threaded Stud and Offset Hole, With Cushion.

    With Cushion

    Free of crevices where bacteria can grow, these mounts have an extremely smooth finish, rounded edges, and a covered stud. A silicone seal at the base of the thread cover keeps contaminants out. The seal is made with chemical additives, so you can find it with an X-ray machine if it falls into your line. Mounts are certified by 3-A, EHEDG, and USDA to meet sanitary design standards. You can also bolt them down so machines don’t creep across the floor or tip over. The mounting hole extends from underneath your machine to give you more room to drill and install fasteners. A 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.
    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—A cushion under the base protects floors from scrapes and gouges.
    Mounting
    Holes
    With Rubber Cushion
    Thread Size
    Thread
    Lg.
    Mounting Ht.
    Swivel Range
    of Motion
    Base
    Dia.
    Fasteners
    Included
    No.
    of
    Dia.
    Food Industry Std.
    Cap. per
    Mount, lb.
    Overall
    Ht.
    Cushion
    Material
    Each
    304 Stainless Steel Base and Stud
    M20 × 2.5 mm2 7/8"4 5/16" to 5 11/16"10°3 1/8"No119/32"3-A Certified 88-00, FDA Compliant 21 CFR 177.2600
    		3,3007 3/16"Buna-N
    		00000000000000
     

    Vibration-Damping Swivel Leveling Mounts with Threaded Stud

    Image of Product. Front orientation. Leveling Mounts. Vibration-Damping Swivel Leveling Mounts with Threaded Stud, With Cushion.

    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
    M20 × 2.5 mm4 3/4"7.5°3 7/8"1,0000.12"5 11/16"Buna-N
    		0000000000000
    M20 × 2.5 mm4 3/4"7.5°3 7/8"2,0000.12"6 5/16"Buna-N
    		000000000000
    M20 × 2.5 mm4 3/4"7.5°5 1/2"3,0000.17"6 7/8"Buna-N
    		00000000000000
    M20 × 2.5 mm4 3/4"7.5°5 1/2"4,0000.17"6 9/16"Buna-N
    		0000000000000
     
    back to top