Flanges | McMaster-Carr

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7,040 Products

Fluid Handling

Pipe Flanges

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

1,173 products

Pipe Fittings

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

250 products

Expansion Joints

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

116 products

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

64 products

Pipe Bleed Rings

Access inside a pipe line to vent pressure, drain liquid, and take samples

22 products

Pipe Plugs

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

24 products

Tube Fittings

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

212 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

13 products

Tube Fitting Clamps

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

145 products

Hose and Hose Fittings

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

27 products

Tube Sampling Ports

Take samples from sanitary tubing without pausing or contaminating your line

2 products

Orifice Valves

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

24 products

Heating, Ventilation, and Air Conditioning

Duct and Fittings

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

344 products

Diffuser Collars

Connect diffusers to duct

4 products

Chimney Pipe and Fittings

Exhaust hot air and fumes from boilers, furnaces, and stoves

12 products

Sealing

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,399 products

Hydraulic Tank Pipe Suction Flanges

Seal pipes passing through top plates of hydraulic tanks

5 products

Pipe Flashings

Create watertight seals around vent pipes on roofs, even if they expand, contract, and vibrate

13 products

Made-to-Order Gaskets

Send your exact specifications to get gaskets that fit precisely between surfaces

16 products

Building and Machinery Hardware

Slip-On Framing and Fittings

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

383 products

Clamp-On Framing and Fittings

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

263 products

Flush-Fit Framing Rail Ends

Secure flush-fit framing structures to floors, walls, and ceilings

3 products

Press-Fit Framing and Fittings

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

90 products

Bellows

Prevent dust and debris from damaging moving parts

393 products

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

43 products

Fastening and Joining

Weld Nuts

Weld to metal surfaces to add permanent threads

308 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

162 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

769 products

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

37 products

Spring Plunger Mounts

Secure ball-nose and long-nose spring plungers to fixture surfaces

14 products

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

11 products

Toilet Seat Fasteners

Secure toilet seat hinges to your toilet bowl

1 product

Floor, Wall, and Ceiling Plates

Add a finishing touch around protruding pipes; also known as escutcheons

46 products

Urinal Flanges

Connect a urinal to your drainage system

2 products

Manhole Riser Rings

Raise a manhole cover to make it level with the surface

4 products

Power Transmission

Lead Screws and Nuts

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

165 products

Ball Screws and Nuts

Internal ball bearings roll on screws for low friction when moving components at high speeds

34 products

Machinable Shaft Ends

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

12 products

Fabricating and Machining

Buffing and Polishing Wheel Flanges

Connect wheels with a center hub to bench grinders and buffers

4 products

Measuring and Inspecting

Pipe Flange Aligners

Line up flange holes so they bolt securely and connections won’t leak

17 products

Safety Equipment

Cover Plates for Fire Sprinkler Heads

Replace the cover on your fire sprinkler head for a clean look; also known as escutcheons

12 products