Round Tube Connectors | McMaster-Carr

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49,430 Products

Building and Machinery Hardware

Slip-On Framing Connectors

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

246 products

Slip-On Framing Rail Supports

Brace long runs of slip-on framing rails, either along walls or through them

33 products

Slip-On Framing Rail Ends

Mount slip-on framing structures to floors, walls, and ceilings

78 products

Clamp-On Framing and Fittings

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

205 products

Flush-Fit Framing and Fittings

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

10 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

42 products

Fastening and Joining

Tube-Connecting Nuts

Push inside tubes to join them with a threaded stud instead of welding

21 products

Spring Button Clips

Join pieces of telescoping tubing using spring force

40 products

Gravity Pins

Slip through holes in telescoping tubing and wrap around to secure

1 product

Fluid Handling

Tube Fittings

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

15,640 products

Tube Fitting Sleeves

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

316 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

395 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

366 products

Tube End Plugs

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

260 products

Tubing Flow Stops

Temporarily block water flow to make soldering repairs without waiting for your line to drain

9 products

Tube Supports

Slip into plastic and rubber tubing to prevent them from collapsing

93 products

Tube Fitting Clamps

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

145 products

Tube Fitting Sleeve and Nut Kits

Everything you need to create a tight seal between a metal tube and a Yor-Lok fitting

31 products

Pipe and Pipe Fittings

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

22,078 products

Hose and Hose Fittings

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

7,621 products

Tube Repair Clamps

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

18 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

637 products

Hose Crimpers

Crimp ferrules onto hose to secure fittings

43 products

Air Chucks

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

28 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

88 products

Tube Crimpers

Create a leak-tight seal between tubing and fittings without heat or solder

25 products

Strainers

Install next to valves and pumps to catch debris in your line

9 products

Lubricating

Grease Fitting Adapters

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

41 products

Measuring and Inspecting

Hose Coupling Size-Identification Kits

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

1 product

Material Handling

Scaffold Locking Pins

Fasten base plates, guardrail posts, and other components to scaffold frames

4 products

Scaffold Clamps

Construct scaffolding and secure supports, such as railings

2 products

Facility and Grounds Maintenance

Faucet Spout Thread Adapters

Connect the female end of your garden hose to a faucet spout

4 products

Safety Equipment

Respirator Temperature Controllers

Adjust the temperature of the air flowing into your respirator

2 products