Steel Flanges | McMaster-Carr

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Specifications Met

OSHA Compliant 29 CFR 1926.451

SAE J518

Maximum Steam Pressure @ Temperature

Shape

For Fitting Schedule

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UN/UNF (SAE Straight)

Connects To

For Flange Pipe Size

Bolt Hole Diameter

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

2,166 Products

Fluid Handling

Pipe and Pipe Fittings

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

613 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

38 products

Hose and Hose Fittings

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

4 products

Orifice Valves

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

12 products

Heating, Ventilation, and Air Conditioning

Duct and Fittings

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

200 products

Diffuser Collars

Connect diffusers to duct

4 products

Chimney Pipe and Fittings

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

9 products

Fastening and Joining

Weld Nuts

Weld to metal surfaces to add permanent threads

214 products

Adhesive-Mount Nuts

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

47 products

Flange Nuts

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

563 products

Spring Plunger Mounts

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

7 products

Hex Head Screws

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

76 products

Sealing

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

123 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

4 products

Fabricating and Machining

Buffing and Polishing Wheel Flanges

Connect wheels with a center hub to bench grinders and buffers

4 products

Flange Spreaders

Separate stubborn flanges

9 products

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

1 product

Floor, Wall, and Ceiling Plates

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

16 products

Power Transmission

Precision Lead Screw Nuts

Pair with precision lead screws for accurate starts and stops in your assembly

7 products

Precision Lead Screw Nut Flanges

Pair with precision lead screw nuts to make custom flange nuts that move items along lead screws

12 products

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

36 products

Machinable Shaft Ends

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

6 products

Building and Machinery Hardware

Clamp-On Framing and Fittings

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

50 products

Press-Fit Framing and Fittings

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

11 products

Slip-On Framing and Fittings

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

5 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

11 products

Material Handling

Scaffold Clamps

Construct scaffolding and secure supports, such as railings

2 products