Joint Connectors | McMaster-Carr

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Compliant with Exemptions

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Maximum Vacuum @ Temperature

1× 10^-13 Torr @ 72° F

1× 10^-11 Torr @ 72° F

1× 10^-9 Torr @ 72° F

1× 10^-8 Torr @ 72° F

1× 10^-7 Torr @ 72° F

1× 10^-6 Torr @ 72° F

Hose ID

20,471 Products

Fluid Handling

Tube Fittings

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

14,398 products

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

9 products

Tube Fitting Sleeves

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

13 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

25 products

Tube End Plugs

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

31 products

Pipe Fittings

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

591 products

Rotary Unions

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

105 products

Expansion Joints

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

159 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

803 products

On-Off Valves

Start and stop flow through a line

2 products

Float Valve Bodies

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

61 products

Fastening and Joining

Binding Barrels and Screws

Thread together for a low-profile fastener

92 products

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

3 products

Studs

Press, weld, or screw in place to add a threaded fastening point

82 products

Wood Screws

Fasten material to wood or pieces of wood to each other

13 products

Dowel Nuts

Form joints in blind holes in wood

11 products

Bit Sockets

Turn fasteners with an internal drive style without slipping and damaging the drive

12 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

159 products

Socket Adapters

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

36 products

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

35 products

Building and Machinery Hardware

Slip-On Framing Connectors

Tighten onto slip-on framing rails to build guards, railings, and racks

246 products

T-Slotted Framing Structural Brackets

Join T-slotted rail surfaces and corners to build virtually any structure

467 products

T-Slotted Framing Braces

Reinforce joined corners of T-slotted rails for a sturdier connection than structural brackets

73 products

T-Slotted Framing Brace Ends

Pair with a T-slotted rail to make a brace of any length

17 products

Flush-Fit Framing and Fittings

Create smooth stair and platform railings by sliding fittings into rails and tightening the screws

7 products

Clamp-On Framing and Fittings

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

172 products

Press-Fit Framing and Fittings

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

31 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

397 products

Bolt-Together Framing and Fittings

Fasten through equally spaced holes to build and adjust guards, tables, and racks

46 products

Weld-Together Framing and Fittings

Permanently join rails and fittings to assemble heavy duty racks, shelving, and work tables

6 products

Locking-Slotted Framing and Fittings

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

6 products

Joint Covers

Shield rotating joints to keep lubricants in and contaminants out

24 products

Lubricating

Grease Fitting Adapters

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

2 products

Power Transmission

Swivel Joints

Handle shaft misalignment where ball joint rod ends won’t fit; also known as spherical bearings

136 products

Rod Ends

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

698 products

U-Joints

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

174 products

Pivot Bearings

Best for applications that require small, precise oscillating motion with limited twisting

20 products

Material Handling

Hitch Inserts

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

19 products

Hitch Balls

Mount to hitch inserts and use with hitch receivers and couplers to tow trailers

9 products

Hitch Pins

Secure hitch inserts to hitch receivers for towing

5 products

Hitch Receivers

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

2 products

Hitch-Ball Couplers

Bolt or weld to trailers and connect to hitch balls on vehicles for towing

6 products

Hitch-Ball Coupler Locks

Insert into the hitch-ball coupler latch or socket on your trailer to prevent theft

4 products

Tow Eyes

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

6 products

Tow Hooks

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

1 product

Forklift Hitch Receivers

Secure to forklift forks and slide in a hitch to adapt a forklift for towing

1 product

Drawbar Couplers

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

12 products

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

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

15 products

Safety Equipment

Safety Railing Connectors

Build custom safety rail structures with tees, elbows, crosses, and more

10 products