Pipe Reducing Adapters | McMaster-Carr

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Fitting Type

Expansion Joint

Reducing Adapter

System of Measurement

Pipe Size

Material

Stainless Steel

Thread Type

UN/UNF (SAE 45°)

UN/UNF (SAE Straight)

Shape

Gender

Fitting Connection

For Use With

Organic Solvents

Pharmaceuticals

Pipe Material

Stainless Steel

Pipe Schedule

Connects To

Maximum Pressure @ Temperature

15 psi @ 72° F

35 psi @ 72° F

50 psi @ 72° F

60 psi @ 72° F

70 psi @ 72° F

75 psi @ 72° F

90 psi @ 72° F

100 psi @ 72° F

110 psi @ 72° F

120 psi @ 72° F

125 psi @ 72° F

130 psi @ 72° F

140 psi @ 72° F

145 psi @ 72° F

150 psi @ 72° F

160 psi @ 72° F

165 psi @ 72° F

Pressure Class

Flange Material

Stainless Steel

Length

Body Shape

Tube OD

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

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

Export Control Classification Number (ECCN)

Specifications Met

ANSI LC 4/CSA 6.32

Regulation (EC) No. 1935/2004

OD

Threading

Threaded on Both Ends

Threaded on One End

How can we improve?

8,390 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 Threaded Pipe and Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

For pressures up to 500 psi

Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

The tightest tolerances of our stainless steel fittings; also called instrumentation fittings

High-Pressure Stainless Steel Threaded Pipe Fittings

High-Pressure Stainless Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Our strongest stainless steel threaded fittings withstand pressures as high as 15,000 psi

Thick-Wall Stainless Steel Threaded Pipe Nipples and Pipe

Thick-Wall Stainless Steel Threaded Pipe Nipples and Pipe

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

Medium-Pressure Stainless Steel Threaded Pipe Fittings

Medium-Pressure Stainless Steel Threaded Pipe Fittings

For pressures up to 1,000 psi

Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings

Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings

Less than two inches to fit in medium-pressure lines with limited space

Low-Pressure Stainless Steel Threaded Pipe Fittings with Sealant

Low-Pressure Stainless Steel Threaded Pipe Fittings with Sealant

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

Premium Medium-Pressure Stainless Steel Threaded Pipe Fittings

Premium Medium-Pressure Stainless Steel Threaded Pipe Fittings

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

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

Iron and Steel Threaded Pipe and Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

High-Pressure Iron and Steel Threaded Pipe Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 6,000 psi

Low-Pressure Iron and Steel Threaded Pipe Fittings with Sealant

Low-Pressure Iron and Steel Threaded Pipe Fittings with Sealant

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

Low-Pressure Threaded Pipe Fittings for Joining Dissimilar Metals

Low-Pressure Threaded Pipe Fittings for Joining Dissimilar Metals

A plastic sleeve prevents corrosion when connecting different types of metal

Medium-Pressure Iron and Steel Threaded Pipe Fittings

Medium-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

Extreme-Pressure Iron and Steel Threaded Pipe Fittings

Extreme-Pressure Iron and Steel Threaded Pipe Fittings

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

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

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

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

Brass and Bronze Threaded Pipe and Fittings

High-Pressure Brass and Bronze Threaded Pipe Fittings

High-Pressure Brass and Bronze Threaded Pipe Fittings

Strong enough for pressures up to 3,900 psi

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Low-Pressure Brass and Bronze Threaded Pipe Fittings

For pressures up to 300 psi

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

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

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

High-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

High-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

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

Low-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

Low-Pressure Brass and Bronze Threaded Pipe Fittings with Sealant

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

Precision High-Pressure Brass and Bronze Threaded Pipe Fittings

Precision High-Pressure Brass and Bronze Threaded Pipe Fittings

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

Medium-Pressure Brass and Bronze Threaded Pipe Fittings

Medium-Pressure Brass and Bronze Threaded Pipe Fittings

For pressures up to 700 psi

Miniature High-Pressure Brass and Bronze Threaded Pipe Fittings

Miniature High-Pressure Brass and Bronze Threaded Pipe Fittings

No bigger than an inch to fit in high-pressure lines with limited space

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

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

Galvanized Iron and Steel Threaded Pipe and Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

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

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

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

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

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

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

Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Precision Extreme-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

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

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

Plastic Pipe and Fittings

Thick-Wall Plastic Pipe Fittings for Water

Thick-Wall Plastic Pipe Fittings for Water

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

Standard-Wall Plastic Pipe Fittings for Water

Standard-Wall Plastic Pipe Fittings for Water

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

UV-Resistant Polypropylene Pipe Fittings for Chemicals

UV-Resistant Polypropylene Pipe Fittings for Chemicals

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

CPVC Pipe Fittings for Chemicals

CPVC Pipe Fittings for Chemicals

Withstand salt solutions, acids, and other harsh substances

Clear-View Standard-Wall Plastic Pipe Fittings for Water

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 Gasoline

Plastic Pipe Fittings for Gasoline

Connect gasoline fuel lines to machines and equipment

High-Temperature PTFE Pipe Fittings for Harsh Chemicals

High-Temperature PTFE Pipe Fittings for Harsh Chemicals

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

Plastic Pipe Fittings for Food and Beverage

Plastic Pipe Fittings for Food and Beverage

Won't transfer tastes or odors to food or beverages

Plastic Pipe Fittings for Oil

Plastic Pipe Fittings for Oil

Won’t deteriorate when exposed to oil

Flame-Retardant PVDF Pipe Fittings for Food and Beverage

Flame-Retardant PVDF Pipe Fittings for Food and Beverage

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

Flame-Retardant PVDF Pipe Fittings for Harsh Chemicals

Flame-Retardant PVDF Pipe Fittings for Harsh Chemicals

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

Plastic Barbed Pipe Fittings for Water

Plastic Barbed Pipe Fittings for Water

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

Crack-Resistant PFA Pipe Fittings for Harsh Chemicals

Crack-Resistant PFA Pipe Fittings for Harsh Chemicals

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

UV-Resistant Standard-Wall Plastic Pipe Fittings for Water

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

Easy-Access CPVC Pipe Fittings for Chemicals

Easy-Access CPVC Pipe Fittings for Chemicals

Connect to pipe with a clamp for quick access to chemical-process lines; known as Victaulic fittings

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

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

Handle acids and organic solvents without leaching contaminants into your line

High-Purity Polypropylene Pipe Fittings for Drinking Water

High-Purity Polypropylene Pipe Fittings for Drinking Water

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

Fiberglass Pipe Fittings for Chemicals

Fiberglass Pipe Fittings for Chemicals

Our strongest plastic fittings for chemical-process applications, such as metal treatment

Aluminum Threaded Pipe and Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 250 psi

Miniature Low-Pressure Aluminum Threaded Pipe Fittings

Miniature Low-Pressure Aluminum Threaded Pipe Fittings

Less than two inches to fit in low-pressure lines with limited space

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

High-Pressure Aluminum Threaded Pipe Fittings

High-Pressure Aluminum Threaded Pipe Fittings

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

Stainless Steel Unthreaded Pipe and Fittings

Medium-Pressure Stainless Steel Butt-Weld Pipe Fittings

Medium-Pressure Stainless Steel Butt-Weld Pipe Fittings

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

Low-Pressure Stainless Steel Butt-Weld Pipe Fittings

Low-Pressure Stainless Steel Butt-Weld Pipe Fittings

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

High-Pressure Stainless Steel Socket-Connect Pipe Fittings

High-Pressure Stainless Steel Socket-Connect Pipe Fittings

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

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

Low-Pressure Stainless Steel Press-Socket Pipe Fittings

Low-Pressure Stainless Steel Press-Socket Pipe Fittings

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

Iron and Steel Unthreaded Pipe and Fittings

Low-Pressure Iron and Steel Butt-Weld Pipe Fittings

Low-Pressure Iron and Steel Butt-Weld Pipe Fittings

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

High-Pressure Iron and Steel Socket-Connect Pipe Fittings

High-Pressure Iron and Steel Socket-Connect Pipe Fittings

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

FM-Approved Medium-Pressure Iron and Steel Grooved-End Pipe Fittings

FM-Approved Medium-Pressure Iron and Steel Grooved-End Pipe Fittings

Clamp to pipe for quick access to fire water mains and sprinkler systems; known as Victaulic fittings

High-Pressure Iron and Steel Butt-Weld Pipe Fittings

High-Pressure Iron and Steel Butt-Weld Pipe Fittings

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

Low-Pressure Iron and Steel Press-Socket Pipe Fittings

Low-Pressure Iron and Steel Press-Socket Pipe Fittings

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

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 Flanged-End Pipe Fittings

FM-Approved Low-Pressure Iron and Steel Flanged-End Pipe Fittings

Mate with flat-surface flanges, pumps, and valves to add an access point in fire-protection systems

Drain, Waste, and Vent Pipe and Fittings

Drain, Waste, and Vent PVC Clamp-On Pipe Fittings for Water

Drain, Waste, and Vent PVC Clamp-On Pipe Fittings for Water

Clamp onto pipe for a strong seal and easy assembly

Underground Drain, Waste, and Vent PVC Pipe Fittings for Water

Underground Drain, Waste, and Vent PVC Pipe Fittings for Water

Thin walls give extra room for high-flow applications, such as underground storm drainage lines

Flame-Retardant Drain, Waste, and Vent CPVC Pipe Fittings for Chemicals

Flame-Retardant Drain, Waste, and Vent CPVC Pipe Fittings for Chemicals

UL rated for flame retardance and NSF certified for use in gravity-flow corrosive-waste systems

Drain, Waste, and Vent Standard-Wall PVC Pipe Fittings for Water

Drain, Waste, and Vent Standard-Wall PVC Pipe Fittings for Water

The industry standard for gravity-flow drain, waste, and vent applications; known as Schedule 40

Drain, Waste, and Vent Iron and Steel Pipe Fittings

Drain, Waste, and Vent Iron and Steel Pipe Fittings

Durable enough for pipe systems above and below ground; also called no-hub and soil pipe fittings

Drain, Waste, and Vent Standard-Wall PVC Pipe Flanges for Water

Drain, Waste, and Vent Standard-Wall PVC Pipe Flanges for Water

Create an access point in gravity-flow drain, waste, and vent lines; also known as Schedule 40

Drain, Waste, and Vent ABS Pipe Fittings for Chemicals

Drain, Waste, and Vent ABS Pipe Fittings for Chemicals

An economical choice for gravity-flow chemical-waste systems; also known as Schedule 40

Flame-Retardant Drain, Waste, and Vent Polypropylene Pipe Fittings for Chemicals

Flame-Retardant Drain, Waste, and Vent Polypropylene Pipe Fittings for Chemicals

UL rated for flame retardance and withstand organic solvents that would dissolve CPVC fitings

Drain, Waste, and Vent ABS Pipe Flanges for Chemicals

Drain, Waste, and Vent ABS Pipe Flanges for Chemicals

Add an access point in gravity-flow chemical-waste systems

Drain, Waste, and Vent PVC Pipe Fittings for Joining Metal to Plastic

Drain, Waste, and Vent PVC Pipe Fittings for Joining Metal to Plastic

Connect PVC waste pipe to cast iron pipe without adding bulk

Aluminum Unthreaded Pipe and Fittings

Low-Pressure Aluminum Quick-Connect Pipe Fittings

Low-Pressure Aluminum Quick-Connect Pipe Fittings

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

Medium-Pressure Aluminum Butt-Weld Pipe Fittings

Medium-Pressure Aluminum Butt-Weld Pipe Fittings

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

Low-Pressure Aluminum Socket-Connect Pipe Fittings

Low-Pressure Aluminum Socket-Connect Pipe Fittings

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

Low-Pressure Aluminum Butt-Weld Pipe Fittings

Low-Pressure Aluminum Butt-Weld Pipe Fittings

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

High-Pressure Aluminum Butt-Weld Pipe Fittings

High-Pressure Aluminum Butt-Weld Pipe Fittings

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

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

Other Products

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

Conduit and Fittings

Conduit and Fittings

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

Manifolds

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

Pipe Expansion Joints

Pipe Expansion Joints

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

Junction Blocks

Junction Blocks

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

Slip-On Framing Connectors

Slip-On Framing Connectors

Tighten onto slip-on framing rails to build guards, railings, and racks

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