Rubber Couplings | McMaster-Carr

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20,838 Products

Fluid Handling

Tube Fittings

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

9,065 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 Nuts

Tighten to create a strong seal between tube and tube fittings

37 products

Tube Fitting Sleeves

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

40 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

14 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

4,792 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 and Pipe Fittings

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

1,973 products

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

2,438 products

Float Valve Bodies

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

71 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

201 products

Shaft Coupling Covers

Shield rigid shaft couplings from dirt, water, and lubricants to extend their life

13 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

28 products

Rod Ends

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

111 products

Rod End Seals

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

16 products

Rod Alignment Couplers

Reduce wear on bearings and seals by flexing when the cylinder and load aren't precisely even

6 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

Separate, position, or connect components in assemblies

23 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

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

Mechanical Control Cables

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

8 products

Electrical

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

14 products

Mini Adapters

Create a branch off a main cord or connect multiple devices with mini connections to a single port

5 products

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

306 products

D-Sub Connectors

Plugs, sockets, and receptacles for connecting computers, monitors, and printers

8 products

Metric Circular Cords

Send power and signal to equipment with metric connections

1 product

Conduit and Conduit Fittings

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

21 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