Steel Couplings | McMaster-Carr

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36,404 Products

Most Likely Products

Pipe Fittings

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

Shaft Couplings

Shaft Couplings

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

All Results

Fluid Handling

Pipe Fittings

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

Pipe Nipples and Pipe

Pipe Nipples and Pipe

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

Pipe Flanges

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

Pipe Plugs

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

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Pipe Collars

Clamp pipe passing through floors and walls

Pipe Fitting Clamps

Pipe Fitting Clamps

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

Expansion Joints

Expansion Joints

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

Hose Fittings

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

Hose Fitting Nuts

Hose Fitting Nuts

Connect fittings and compressed-gas nipples to pressure regulators and torches

Hose End Caps

Cover the ends of hose to keep out dirt and debris

Hose Fitting Retaining Chains

Hose Fitting Retaining Chains

Ensure hose end caps and plugs stay connected to the line

Tube Fittings

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

Tube Fitting Clamps

Tube Fitting Clamps

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

Tube Fitting Nuts

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

Tube End Caps

Cover the ends of tube to keep out dirt and debris

Tube Fitting Sleeves

Tube Fitting Sleeves

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

Tube End Plugs

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

Tube Repair Clamps

Tube Repair Clamps

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

Pipe Repair Clamps

Pipe Repair Clamps

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

Air Chucks

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

Flow-Adjustment Valves

Flow-Adjustment Valves

Gradually open and close to control the volume of air and liquids though a line

Orifice Valves

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

Float Valve Bodies

Float Valve Bodies

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

Power Transmission

Shaft Couplings

Shaft Couplings

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

Shaft Adapters

Increase or reduce your shaft's diameter to fit equipment, or replace damaged shaft ends

U-Joints

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

Machinable Shaft Ends

Machinable Shaft Ends

Mill custom pulleys, threaded hubs, sprockets, collars, and sensor targets and mount them to shafts

Bore Reducers

Adapt the bore of a component to a smaller size for mounting on a shaft

Shear Couplings

Shear Couplings

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

Flexible Shafts

Flexible Shafts

Snake around curves and obstructions to transmit rotary motion along any path

Rod Alignment Couplers

Rod Alignment Couplers

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

Hydraulic Cylinder Mounts

Hydraulic Cylinder Mounts

Restrain cylinders and secure loads to the end of the rod

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

Rod Ends

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

Rod End Inserts

Rod End Inserts

Attach to rod ends to increase the amount of misalignment they can handle

Rod End Nuts

Attach to rods, pipe, and tubing to make pivot and hinge points

Lead Screws and Nuts

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

Bearing Adapter Sleeves

Bearing Adapter Sleeves

Close gaps between your bearing and shaft for a tight fit

Clutches

Start and stop the transmission of power to machinery

Torque Limiters

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

Fastening and Joining

Coupling Nuts

Connect and extend threaded rods

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Standoffs

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

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Socket Adapters

Socket Adapters

Make your socket more versatile, from converting the drive to limiting torque

Brazing Rings

Snap into metal pipe and tubing to form leak-resistant joints more quickly than with hand-fed alloys

Electrical

Conduit-to-Conduit Connectors

Conduit-to-Conduit Connectors

Join pieces of conduit

Conduit Box Connectors

Conduit Box Connectors

Attach conduit to a knockout in electrical boxes

Conduit

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

Electrical Connectors and Cords

Electrical Connectors and Cords

Supply power to equipment by combining plugs, sockets, receptacles, and cords

Material Handling

Tow Eyes

Mount to trailers and connect to tow hooks or drawbar couplers on vehicles for towing

Drawbar Couplers

Drawbar Couplers

Use with drawbar rings to connect trailers to vehicles; also known as pintle hitches

Trailer Couplers

Trailer Couplers

Push trailer-mounted rings into vehicle-mounted jaws for towing

Hitch Inserts

Fit into hitch receivers and secure with a hitch pin to create a connection for towing

Hitch Receivers

Hitch Receivers

Use with hitch inserts and pins to create a complete hitch for towing

Tow Hooks

Bolt to vehicles and connect to tow eyes on trailers for towing

Chain Connecting Links

Chain Connecting Links

Attach fittings to lift components or bind, tie down, and pull items

Chain Rings

Join chains and add connectors for binding, towing, and lifting

Quick Links

Screw the nut closed to join lengths of chain and add connectors

Shackles

Lift, pull, and anchor heavy loads while keeping them secure with a pin

Swivels

Rotate loads to keep rope and chain from twisting and knotting

Ring Links

Bend, hammer, or twist closed to connect chain links and attach fittings

Measuring and Inspecting

Hose Coupling Size-Identification Kits

Hose Coupling Size-Identification Kits

Match your hose coupling to one of the plugs to determine its size without measuring

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Duct and Duct Fittings

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

Diffuser Collars

Diffuser Collars

Connect diffusers to duct

Lubricating

Grease Gun Nozzles

Grease Gun Nozzles

Replace nozzles on grease guns

Grease Gun Filler Pump Dispensing Tips

Grease Gun Filler Pump Dispensing Tips

Switch out dispensing tips on grease gun filler pumps

Grease Gun Couplers

Grease Gun Couplers

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

Grease Fitting Adapters

Grease Fitting Adapters

Mate grease fittings when the sizes and thread types don't match

Building and Machinery Hardware

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

Slip-On Framing and Fittings

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

Press-Fit Framing and Fittings

Press-Fit Framing and Fittings

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

Locking-Slotted Framing and Fittings

Locking-Slotted Framing and Fittings

Make platforms, bases, and other structures that stand up to more movement than T-slotted framing

Control Cables

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

Containers, Storage, and Furniture

Stacking Caps and Targets

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

Communication

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)