Rubber Couplings | McMaster-Carr

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17,715 Products

Fluid Handling

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

9,081 products

Tube Fitting Clamps

Quickly secure connections between tube fittings, including sanitary and high-vacuum fittings

33 products

Tube Fitting Rings

Prevent leaks at tubing connection points

33 products

Tube Fitting Sleeves

Pair with nuts and fittings to form a secure connection on tubing

40 products

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

37 products

Tube Supports

Slip into plastic and rubber tubing to prevent them from collapsing

15 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

15 products

Tube End Plugs

Insert into the ends of tube to keep out dirt and debris

3 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

4,816 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

133 products

Hose End Plugs

Insert into the ends of hose to keep out dirt and debris

13 products

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

1,544 products

Pipe Fitting Clamps

Connect easy-access and grooved-end pipe fittings to pipe

18 products

Expansion Joints

Reduce stress, vibration, and noise in piping systems by absorbing movement

133 products

Pipe Nipples and Pipe

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

2 products

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

31 products

Pipe Plugs

Insert into the ends of pipe to keep out dirt and debris

6 products

Rotary Unions

Transfer air, water, oil, and steam from supply lines to continuously revolving drums and rollers

1 product

Pipe Repair Clamps

Fix small holes and cracks in pipe without taking your system apart

244 products

Tube Repair Clamps

Mend small holes, cracks, and full-circle breaks in tubing without dismantling your system

18 products

Duct Hose and Fittings

Connect to blowers and vacuums to move air, fumes, dust, chips, and liquids

8 products

Air Chucks

Connect air hose to Schrader valves, which are common on tires and hydraulic systems

7 products

Hose Kink Absorbers

Prevent hose from kinking to ensure maximum flow and extend hose life

1 product

On-Off Valves

Start and stop flow through a line

33 products

Float Valve Bodies

Pair with floats and rods to create float valves that meet your needs

55 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

4 products

Power Transmission

Shaft Couplings

Connect two shafts to transfer rotary motion from one to the other

214 products

Shear Couplings

Sever the connection between shafts when there's too much torque to protect parts from breaking

21 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

23 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

113 products

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

16 products

Roller Chain Links

Join chain lengths together

6 products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

12 products

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

23 products

Lubricating

Grease Gun Nozzles

Replace nozzles on grease guns

21 products

Grease Gun Couplers

Extend the dispensing tip on grease guns to lubricate angled and hard-to-reach areas

2 products

Grease Gun Tips

Attach to grease gun nozzles and direct a stream of lubricant into grease fittings on machinery

1 product

Building and Machinery Hardware

Joint Covers

Shield rotating joints to keep lubricants in and contaminants out

24 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

11 products

Press-Fit Framing and Fittings

Set up temporary partitions, guards, and displays using only a hammer

1 product

Control Cables

Weave around obstructions to operate valves, throttles, and other machinery from a distance

8 products

Heating, Ventilation, and Air Conditioning

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

60 products

Duct Airflow Dampers

Regulate airflow to sections of duct

5 products

Electrical

Conduit

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

15 products

Conduit Box Connectors

Attach conduit to a knockout in electrical boxes

6 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

15 products