1/2 Pipe Size Fittings | McMaster-Carr

Premium Low-Pressure Stainless Steel Threaded Pipe Fittings

Cast in the U.S. and include certificate with traceable lot number

Premium Medium-Pressure Stainless Steel Threaded Pipe Fittings

Cast in the U.S. and include certificate with traceable lot number

Standard-Wall Stainless Steel Threaded Pipe Nipples and Pipe with Sealant

Male threads have sealant applied for extra leak protection in low-pressure lines

24 products

Low-Pressure Stainless Steel Threaded Pipe Flanges

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

Standard-Wall Stainless Steel Threaded Pipe Nipples and Pipe Assortments

Keep multiple lengths of low-pressure pipe nipples and pipe on hand

High-Pressure Stainless Steel Threaded Pipe Flanges

Create an access point in lines up to 1,200 psi; also known as Class 300 or Class 600 flanges

Low-Pressure Iron and Steel Threaded Pipe Fittings

Iron and Steel Threaded Pipe and Fittings

For pressures up to 300 psi

113 products

High-Pressure Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 6,000 psi

41 products

Extreme-Pressure Iron and Steel Threaded Pipe Fittings

Our strongest iron and steel threaded fittings withstand pressures up to 7,500 psi

142 products

Standard-Wall Iron and Steel Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

68 products

Medium-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

Thick-Wall Iron and Steel Threaded Pipe Nipples and Pipe

Pair with medium-pressure fittings; also known as Schedule 80

59 products

Low-Pressure Iron and Steel Threaded Pipe Fittings with Sealant

Male threads have sealant applied for extra leak protection in low-pressure lines

Extra-Thick-Wall Iron and Steel Threaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 160

Quick-Tighten Low-Pressure Iron and Steel Threaded Pipe Fittings

Tighten both ends at the same time by turning with a wrench

Low-Pressure Threaded Pipe Fittings for Joining Dissimilar Metals

A plastic sleeve prevents corrosion when connecting different types of metal

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

Connect threaded pipe in fire water mains and sprinkler systems

Low-Pressure Iron and Steel Threaded Pipe Flanges

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

Ultra-Thick-Wall Iron and Steel Threaded Pipe Nipples and Pipe

Our strongest threaded pipe for handling extreme pressures; also known as Schedule XXH

16 products

Extreme-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in extreme-pressure lines; also known as Class 1500 flanges

Standard-Wall Iron and Steel Threaded Pipe Nipples and Pipe with Sealant

Threads have sealant applied for extra leak protection in low-pressure lines; known as Schedule 40

Standard-Wall Iron and Steel Threaded Pipe Nipples and Pipe Assortments

Keep various lengths of low-pressure pipe nipples and pipe on hand

Quick-Tighten Standard-Wall Iron and Steel Threaded Pipe Nipples and Pipe

Tighten both ends at the same time by turning with a wrench; also known as Schedule 40

High-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 1,400 psi; also known as Class 300 or Class 600 flanges

High-Pressure Brass and Bronze Threaded Pipe Fittings

Brass and Bronze Threaded Pipe and Fittings

Strong enough for pressures up to 3,900 psi

230 products

Low-Pressure Brass and Bronze Threaded Pipe Fittings

For pressures up to 300 psi

178 products

Medium-Pressure Brass and Bronze Threaded Pipe Fittings

For pressures up to 700 psi

30 products

Standard-Wall Brass and Bronze Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

49 products

High-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

Male threads have sealant applied for extra leak protection in high-pressure lines

21 products

High-Pressure Brass and Bronze Threaded Pipe Fittings for Drinking Water

NSF/ANSI rated for drinking water systems up to 1,200 psi

35 products

High-Pressure Brass and Bronze Threaded Pipe Nipples and Pipe

Strong enough for pressures up to 2,170 psi

27 products

Precision High-Pressure Brass and Bronze Threaded Pipe Fittings

The tightest tolerances of our brass pipe fittings; also known as instrumentation fittings

35 products

Low-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

Male threads have sealant for extra leak protection in low-pressure lines

Universal-Thread Medium-Pressure Brass and Bronze Threaded Pipe Fittings

Compatible with the most common thread types for when you're unsure which one you need

High-Pressure Brass and Bronze Threaded Pipe Nipples and Pipe for Drinking Water

NSF/ANSI rated for drinking water systems up to 1,000 psi

Thick-Wall Brass and Bronze Threaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 80

Standard-Wall Brass and Bronze Threaded Pipe Nipples and Pipe with Sealant

Threads have sealant applied for extra leak protection in low-pressure lines; known as Schedule 40

Easy-Install High-Pressure Brass and Bronze Threaded Pipe Fittings

Install and remove with a socket wrench or hex key

Standard-Wall Brass and Bronze Threaded Pipe Nipples and Pipe for Drinking Water

NSF/ANSI rated for drinking water systems; also known as Schedule 40

High-Pressure Brass and Bronze Threaded Pipe Nipples and Pipe with Sealant

Male threads have sealant applied for extra leak protection in high-pressure lines

Low-Pressure Brass and Bronze Threaded Pipe Flanges

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

Standard-Wall Brass and Bronze Threaded Pipe Nipples and Pipe Assortments for Drinking Water

Keep various lengths of NSF/ANSI-rated pipe on hand

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Galvanized Iron and Steel Threaded Pipe and Fittings

For pressures up to 300 psi

92 products

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

41 products

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

19 products

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant

Male threads have sealant applied for extra leak protection in low-pressure lines

Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

The tightest tolerances of our iron and steel fittings; also known as instrumentation fittings

29 products

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

20 products

Quick-Tighten Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Tighten both ends at the same time by turning with a wrench

Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with medium-pressure fittings; also known as Schedule 80

Extra-Thick-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 160

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe with Sealant

Threads have sealant applied for extra leak protection in low-pressure lines

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe for Joining Dissimilar Metals

A plastic sleeve prevents corrosion when connecting different types of metal

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

Standard-Wall Galvanized Iron and Steel Threaded Pipe Nipples and Pipe Assortments

Keep multiple lengths of low-pressure pipe nipples and pipe on hand; also known as Schedule 40

Thick-Wall Plastic Pipe Fittings for Water

Plastic Pipe and Fittings

Withstand heavy duty applications, such as water processing; also known as Schedule 80

138 products

Standard-Wall Plastic Pipe Fittings for Water

The industry standard for low-pressure water lines; also known as Schedule 40

119 products

CPVC Pipe Fittings for Chemicals

Withstand salt solutions, acids, and other harsh substances

100 products

UV-Resistant Polypropylene Pipe Fittings for Chemicals

Withstand sunlight as well as acids, solvents, and other chemicals

CPVC Pipe Nipples and Pipe for Chemicals

Withstand salt solutions, acids, and other harsh substances; also known as Schedule 80

27 products

Thick-Wall Plastic Pipe Nipples and Pipe for Water

Withstand heavy duty applications, such as water processing; also known as Schedule 80

High-Temperature PTFE Pipe Fittings for Harsh Chemicals

Withstand the widest temperature range of our plastic pipe for chemicals; known as Schedule 80

17 products

Plastic Barbed Pipe Fittings for Water

Clamp to semi-flexible plastic pipe to connect lines up to 200 psi; also called insert fittings

25 products

Flame-Retardant PVDF Pipe Fittings for Harsh Chemicals

UL rated for flame retardance and withstand solvents and other harsh chemicals

Clear-View Standard-Wall Plastic Pipe Fittings for Water

See inside low-pressure plumbing and water supply lines; also known as Schedule 40

Plastic Pipe Fittings for Oil

Won’t deteriorate when exposed to oil

30 products

Crack-Resistant PFA Pipe Fittings for Harsh Chemicals

Resist cracking in heavy duty chemical flow processes; also known as Schedule 80

Plastic Pipe Fittings for Gasoline

Connect gasoline fuel lines to machines and equipment

17 products

Flame-Retardant PVDF Pipe Fittings for Food and Beverage

IEC rated for flame retardance, NSF/ANSI rated for drinking water, and FDA compliant

High-Purity Polypropylene Pipe Fittings for Drinking Water

Polished to an ultra-smooth finish that won't leach contaminants or accumulate particles

25 products

Flame-Retardant High-Purity PVDF Pipe Fittings for Harsh Chemicals

Handle acids and organic solvents without leaching contaminants into your line

21 products

Plastic Pipe Fittings for Food and Beverage

Won't transfer tastes or odors to food or beverages

16 products

High-Temperature PTFE Pipe Nipples and Pipe for Harsh Chemicals

Withstand the widest temperature range of our plastic pipe for chemicals; known as Schedule 80

Clear-View Thick-Wall Plastic Pipe Nipples and Pipe for Water

See inside high-pressure plumbing and water supply lines; also known as Schedule 80

Thick-Wall Plastic Pipe Flanges for Water

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

Polypropylene Barbed Pipe Fittings for Chemicals

Clamp to semi-flexible plastic pipe and withstand acids and solvents; also called insert fittings

CPVC Pipe Flanges for Chemicals

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

UV-Resistant Polypropylene Pipe Nipples and Pipe for Chemicals

Withstand sunlight as well as acids, solvents, and other chemicals; also known as Schedule 80

UV-Resistant Standard-Wall Plastic Pipe Fittings for Water

Stand up to sunlight for use in outdoor low-pressure water lines; also known as Schedule 40

Flame-Retardant PVDF Pipe Nipples and Pipe for Harsh Chemicals

UL rated for flame retardance and withstand solvents and other harsh chemicals

Standard-Wall Plastic Pipe Nipples and Pipe for Water

The industry standard for low-pressure water lines; also known as Schedule 40

Clear-View Standard-Wall Plastic Pipe Nipples and Pipe for Water

See inside low-pressure plumbing and water supply lines; also known as Schedule 40

Flame-Retardant High-Purity PVDF Pipe Nipples and Pipe for Harsh Chemicals

Handle acids and organic solvents without leaching contaminants into your line

High-Purity Polypropylene Pipe Nipples and Pipe for Drinking Water

Polished to an ultra-smooth finish that won't leach contaminants or accumulate particles

Spin-Weld Plastic Pipe Fittings for Water

Melt into plastic tanks, walls, and panels for a leak-free connection without gaskets or sealants

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

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

Low-Pressure Plastic Compression Pipe Fittings for Water

Tighten by hand for quick, leak-free connections in lines up to 125 psi

Semi-Flexible Plastic Pipe Nipples and Pipe for Water

Clamp to barbed plastic fittings to build lines flexible enough to bend around objects

UV-Resistant Standard-Wall Plastic Pipe Nipples and Pipe for Water

Stand up to sunlight for use in outdoor low-pressure water lines; also known as Schedule 40

High-Purity Polypropylene Pipe Flanges for Drinking Water

Add an access point to lines that won't leach contaminants; also known as Class 150 flanges

High-Temperature PTFE Pipe Flanges for Harsh Chemicals

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

UV-Resistant Thick-Wall Plastic Pipe Nipples and Pipe for Water

Stand up to sunlight for use in outdoor high-pressure water lines; also known as Schedule 80

Low-Pressure Aluminum Threaded Pipe Fittings

Aluminum Threaded Pipe and Fittings

For pressures up to 250 psi

66 products

Standard-Wall Aluminum Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

33 products

High-Pressure Aluminum Threaded Pipe Fittings

Our strongest aluminum threaded fittings withstand pressures up to 3,000 psi

15 products

Medium-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 1,000 psi

Low-Pressure Aluminum Threaded Pipe Flanges

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

Thick-Wall Aluminum Threaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 80

Medium-Pressure Stainless Steel Butt-Weld Pipe Fittings

Stainless Steel Unthreaded Pipe and Fittings

Beveled ends help create strong welds for maximum flow in medium-pressure lines

High-Pressure Stainless Steel Socket-Connect Pipe Fittings

Easier to weld than butt-weld fittings and withstand pressures up to 3,000 psi

32 products

Low-Pressure Stainless Steel Socket-Connect Pipe Fittings

Easier to weld than butt-weld fittings and withstand pressures up to 300 psi

Low-Pressure Stainless Steel Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in low-pressure lines

26 products

Extreme-Pressure Stainless Steel Socket-Connect Pipe Fittings

Our strongest stainless steel unthreaded fittings withstand pressures up to 7,700 psi

Standard-Wall Stainless Steel Unthreaded Pipe Nipples and Pipe

Pair with low- and medium-pressure fittings; also known as Schedule 40

25 products

Low-Pressure Stainless Steel Press-Socket Pipe Fittings

Crimp onto pipe for a leak-free connection that's faster than threading or welding

16 products

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

Thick-Wall Stainless Steel Unthreaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 80

Thin-Wall Stainless Steel Unthreaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 10

Extra-Thick-Wall Stainless Steel Unthreaded Pipe Nipples and Pipe

The strongest stainless steel pipe we offer for extreme pressures; also known as Schedule 160

High-Pressure Stainless Steel Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in lines up to 3,000 psi

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,200 psi; also known as Class 300 or Class 600 flanges

Low-Pressure Stainless Steel Compression Pipe Fittings

Tighten by hand for quick, leak-free connections in lines up to 200 psi

High-Pressure Iron and Steel Socket-Connect Pipe Fittings

Iron and Steel Unthreaded Pipe and Fittings

Easier to weld than butt-weld fittings and withstand pressures up to 3,000 psi

21 products

Low-Pressure Iron and Steel Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in low-pressure lines

19 products

Low-Pressure Iron and Steel Press-Socket Pipe Fittings

Crimp onto pipe for a leak-free connection that's faster than threading or welding

36 products

High-Pressure Iron and Steel Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in high-pressure lines

Medium-Pressure Iron and Steel Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in medium-pressure lines

Low-Pressure Iron and Steel Compression Pipe Fittings

Tighten by hand for quick, leak-free connections in lines up to 200 psi

Extreme-Pressure Iron and Steel Socket-Connect Pipe Fittings

Our strongest iron and steel unthreaded fittings withstand pressures up to 6,000 psi

Standard-Wall Iron and Steel Unthreaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

Thick-Wall Iron and Steel Unthreaded Pipe Nipples and Pipe

Pair with high-pressure fittings; also known as Schedule 80

High-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,400 psi; also known as Class 300 or Class 600 flanges

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

Ultra-Thick-Wall Iron and Steel Unthreaded Pipe Nipples and Pipe

Our strongest unthreaded pipe for handling extreme pressures; also known as Schedule XXH

High-Pressure Iron and Steel Clamp-On Pipe Fittings for Drinking Water

NSF/ANSI rated for drinking water systems up to 500 psi

Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in extreme-pressure lines; also known as Class 1500 flanges

Low-Pressure Brass and Bronze Braze-Socket Pipe Fittings

Brass and Bronze Unthreaded Pipe and Fittings

Braze to pipe for a strong connection in lines up to 200 psi; also known as Silbraze fittings

Standard-Wall Brass and Bronze Unthreaded Pipe Nipples and Pipe

Braze to low-pressure pipe and fittings for a strong, leak-free connection; known as Schedule 40

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

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

Low-Pressure Copper Threaded Pipe Fittings

Copper Threaded Pipe and Fittings

For pressures up to 200 psi

Standard-Wall Copper Threaded Pipe Nipples and Pipe

Pair with low-pressure fittings; also known as Schedule 40

Low-Pressure Aluminum Quick-Connect Pipe Fittings

Aluminum Unthreaded Pipe and Fittings

Twist onto pipe for quick, sealed connections without threading, soldering, or welding

Low-Pressure Aluminum Socket-Connect Pipe Fittings

Easier to weld than butt-weld fittings since perfect alignment isn't necessary

Medium-Pressure Aluminum Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in medium-pressure lines

Low-Pressure Aluminum Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in low-pressure lines

Low-Pressure Aluminum Unthreaded Pipe Flanges

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

Standard-Wall Aluminum Unthreaded Pipe Nipples and Pipe

Pair with low- and medium-pressure fittings; also known as Schedule 40

11 products

Thick-Wall Aluminum Unthreaded Pipe Nipples and Pipe

The strongest aluminum unthreaded pipe we offer; also known as Schedule 80

High-Pressure Aluminum Butt-Weld Pipe Fittings

Beveled ends help create strong welds for maximum flow in high-pressure lines

High-Pressure Titanium Threaded Pipe Fittings

Titanium Threaded Pipe and Fittings

Strong, lightweight, and more corrosion resistant than stainless steel fittings

Low-Pressure Galvanized Iron and Steel Compression Pipe Fittings

Galvanized Iron and Steel Unthreaded Pipe and Fittings

Tighten by hand for quick, leak-free connections in lines up to 125 psi

Low-Pressure Galvanized Iron and Steel Clamp-On Pipe Fittings

Tighten the bolts to join pipe in air, vacuum, and gravity-flow systems up to 15 psi

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

Other Products

Tube Fittings

1,269 products

Hose Fittings

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

719 products

Manual On-Off Valves

Start and stop flow through a line

508 products

Thread Adapters

Join threads of a different type, size, and gender

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

Pipe Locknuts

15 products

Manifolds

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

194 products

Breather Vents

Maintain even pressure and vacuum as temperatures change by allowing airflow in tanks and enclosures

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

Orifice Valves

73 products

Flowmeter Tees

Pair with a sensor and a display to measure a liquid's flow in hard-to-access areas

Seal pipe and tubing lines when checking for leaks

Expansion Plugs

Connect a pipe flange to a pipe without needing to weld it in place

Pipe Stub Ends

Faucet Spout Thread Adapters

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

Create a seal that prevents the backflow of gas

Pipe Traps

Rotate to prevent hose from kinking, twisting, and wearing

Hose Nozzle Swivels

Transfer air, water, oil, and steam from supply lines to continuously revolving drums and rollers

Rotary Joints

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

Pipe Bleed Rings

Create a temporary connection point for gauges and other testing equipment

Pressure Test Fittings

Cover the ends of hose to keep out dirt and debris

Hose End Caps

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

Conduit and Fittings

188 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Mating parts join valves to a line for quick connection and removal

Valve Union Fittings

A solenoid withstands rapid cycling for applications with frequent opening and closing

Solenoid On-Off Valves

78 products

Junction Blocks

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

Form tight seals when connecting flanged pipe fittings

Pipe Gaskets

82 products

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

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

Grommets

Protect just about anything, including pipe, flanges, screws, and posts

Protective Caps

11 products

Pipe Collars

Clamp pipe passing through floors and walls

Fix small holes and cracks in pipe without taking your system apart

Pipe Repair Clamps

Install in engine blocks and other machinery to pour in oil while keeping dust out

Oil Fittings

Compressed Air Filter/Regulator/Lubricator Manifolds

Distribute compressed air to multiple locations from a single source

Create an inlet on equipment and machinery for injecting lubricant; also known as Zerk fittings

Grease Fittings

Liquid-Dispensing Metering Valves

Program to dispense a specific amount of liquid every time and shut off when set amount is reached

Air-Actuated On-Off Valves

Operate on compressed air to start and stop flow faster than motor-driven valves

39 products

Motor-Actuated On-Off Valves

An electric motor handles higher flow rates and pressures than solenoid valves

Temporarily block the flow between pipe flanges as you work downstream; also known as paddle blinds

Pipeline Fluid Blockers

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

Pressure-Relief Valves