Four-Bolt Flanges | McMaster-Carr

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Stainless Steel

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Expansion Joint

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Flanged Connection Surface

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Stainless Steel

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UN/UNF (SAE Straight)

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Stainless Steel

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Nonabrasive Slurries

Acetic Acid (White Vinegar) (5% Concentration)

Acetic Acid (White Vinegar) (10% Concentration)

Acetic Acid (White Vinegar) (75% Concentration)

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1,254 Products

Fluid Handling

Pipe Flanges

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

Expansion Joints

Expansion Joints

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

Pipe Fittings

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

Tube Fittings

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

Hose Fittings

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

Orifice Valves

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

Power Transmission

Mounted Bearings

Mounted Bearings

Ball, roller, and sleeve bearings ready to bolt in place

Lead Screws and Nuts

Lead Screws and Nuts

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

Building and Machinery Hardware

Slip-On Framing Rail Ends

Slip-On Framing Rail Ends

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

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

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

Press-Fit Framing and Fittings

Press-Fit Framing and Fittings

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

Heating, Ventilation, and Air Conditioning

Duct Flanges

Mount on equipment to start a run of duct, or make a connection between two duct ends

Facility and Grounds Maintenance

Toilet Mounts

Secure toilet components with flanges and hardware kits

Sealing

Hydraulic Tank Pipe Suction Flanges

Hydraulic Tank Pipe Suction Flanges

Seal pipes passing through top plates of hydraulic tanks

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