4 1/4" OD Flanges | McMaster-Carr

Filter by

System of Measurement

Pipe Size

Material

Stainless Steel

Fitting Connection

Spec Image

Spec Image

Spec Image

Fitting Type

Expansion Joint

Pressure Class

Flanged Connection Surface

Pipe Material

Stainless Steel

Fitting Material

Stainless Steel

Thread Type

Pipe Schedule

Bolt Circle Diameter

Connects To

For Flange Pipe Size

Number of Bolt Holes

For Use With

Calcium Chloride

Hydraulic Fluid

Gender

Specifications Met

Flange Type

Shape

REACH

RoHS

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

DFARS Specialty Metals

How can we improve?

108 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Pipe and Fittings

Stainless Steel Unthreaded Pipe and Fittings

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

Stainless Steel Threaded Pipe and Fittings

Low-Pressure Stainless Steel Threaded Pipe Flanges

Low-Pressure Stainless Steel Threaded Pipe Flanges

Create an access point in lines up to 290 psi; also known as Class 150 flanges

Plastic Pipe and Fittings

Thick-Wall Plastic Pipe Flanges for Water

Thick-Wall Plastic Pipe Flanges for Water

Create an access point in high-pressure water supply lines; also known as Class 150 flanges

CPVC Pipe Flanges for Chemicals

CPVC Pipe Flanges for Chemicals

Add an access point to lines that withstand chemicals; also known as Class 150 flanges

UV-Resistant Polypropylene Pipe Flanges for Chemicals

UV-Resistant Polypropylene Pipe Flanges for Chemicals

Add an access point to lines that withstand sunlight and chemicals; also known as Class 150 flanges

Flame-Retardant PVDF Pipe Flanges for Harsh Chemicals

Flame-Retardant PVDF Pipe Flanges for Harsh Chemicals

Add an access point to lines that resist spreading fire and withstand harsh chemicals

High-Temperature PTFE Pipe Flanges for Harsh Chemicals

High-Temperature PTFE Pipe Flanges for Harsh Chemicals

Add an access point in high-temperature chemical-process lines; also known as Class 150 flanges

Iron and Steel Unthreaded Pipe and Fittings

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

FM-Approved Low-Pressure Iron and Steel Unthreaded Pipe Flanges

FM-Approved Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Add an access point to fire water mains and sprinkler systems

Iron and Steel Threaded Pipe and Fittings

Low-Pressure Iron and Steel Threaded Pipe Flanges

Low-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 285 psi; also known as Class 150 flanges

FM-Approved Low-Pressure Iron and Steel Threaded Pipe Flanges

FM-Approved Low-Pressure Iron and Steel Threaded Pipe Flanges

Add an access point to fire water mains and sprinkler systems

Aluminum Threaded Pipe and Fittings

Low-Pressure Aluminum Threaded Pipe Flanges

Low-Pressure Aluminum Threaded Pipe Flanges

Create an access point in lines up to 150 psi; also known as Class 125 flanges

Aluminum Unthreaded Pipe and Fittings

Low-Pressure Aluminum Unthreaded Pipe Flanges

Low-Pressure Aluminum Unthreaded Pipe Flanges

Create an access point in lines up to 150 psi; also known as Class 125 flanges

Galvanized Iron and Steel Threaded Pipe and Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 285 psi; also known as Class 150 flanges

Brass and Bronze Threaded Pipe and Fittings

Low-Pressure Brass and Bronze Threaded Pipe Flanges

Low-Pressure Brass and Bronze Threaded Pipe Flanges

Create an access point in lines up to 225 psi; also known as Class 150 flanges

Brass and Bronze Unthreaded Pipe and Fittings

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

Create an access point in lines up to 225 psi; also known as Silbraze flanges

Other Products

Tube Flanges

Bolt to equipment or other flanged connections to create an access point within a line

Pipe Expansion Joints

Pipe Expansion Joints

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

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