Mil. Spec. Pipe | McMaster-Carr

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Specifications Met

NACE MR0175/ISO 15156

SAE Standard

Military Specification

Army-Navy Specification

Federal Specification

Military Specification

NAS

NAVSEA 810-1385880

System of Measurement

Pipe Size

Material

Shape

Fitting Type

Fitting Connection

Pipe Schedule

Pipe Material

Thread Type

Gender

For Use With

Length

Pressure Class

Wall Thickness

Connects To

Flange Material

REACH

RoHS

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Exempt

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

Yes

Export Control Classification Number (ECCN)

Certification

5,856 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

For pressures up to 500 psi

819 products

Medium-Pressure Stainless Steel Threaded Pipe Fittings

For pressures up to 1,000 psi

158 products

Premium Low-Pressure Stainless Steel Threaded Pipe Fittings

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

122 products

Thick-Wall Stainless Steel Threaded Pipe Nipples and Pipe

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

21 products

Low-Pressure Stainless Steel Threaded Pipe Fittings with Sealant

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

114 products

Premium Medium-Pressure Stainless Steel Threaded Pipe Fittings

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

47 products

High-Pressure Stainless Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

51 products

Low-Pressure Stainless Steel Threaded Pipe Flanges

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

18 products

Stainless Steel Unthreaded Pipe and Fittings

Medium-Pressure Stainless Steel Butt-Weld Pipe Fittings

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

164 products

Low-Pressure Stainless Steel Butt-Weld Pipe Fittings

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

258 products

Low-Pressure Stainless Steel Socket-Connect Pipe Fittings

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

60 products

High-Pressure Stainless Steel Butt-Weld Pipe Fittings

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

37 products

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

108 products

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

32 products

Iron and Steel Threaded Pipe and Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 6,000 psi

48 products

Low-Pressure Iron and Steel Threaded Pipe Flanges

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

60 products

Extreme-Pressure Iron and Steel Threaded Pipe Flanges

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

6 products

Copper Unthreaded Pipe and Fittings

Standard-Wall Copper Unthreaded Pipe Nipples and Pipe

Pair with low-pressure fittings

18 products

Low-Pressure Copper Butt-Weld Pipe Fittings

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

18 products

Iron and Steel Unthreaded Pipe and Fittings

Medium-Pressure Iron and Steel Butt-Weld Pipe Fittings

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

17 products

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

79 products

High-Pressure Iron and Steel Socket-Connect Pipe Fittings

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

48 products

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

14 products

Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

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

18 products

Brass and Bronze Threaded Pipe and Fittings

Standard-Wall Brass and Bronze Threaded Pipe Nipples and Pipe

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

89 products

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

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

11 products

Galvanized Iron and Steel Threaded Pipe and Fittings

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

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

46 products

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

For pressures up to 2,000 psi

10 products

High-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Strong enough for pressures up to 3,000 psi

8 products

Aluminum Threaded Pipe and Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 250 psi

134 products

High-Pressure Aluminum Threaded Pipe Fittings

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

43 products

Brass and Bronze Unthreaded Pipe and Fittings

Low-Pressure Brass and Bronze Braze-Socket Pipe Fittings

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

35 products

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

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

10 products

Other Products

Steel

Strong, machinable, and weldable—all with material certificates for traceability

146 products

Tube Fittings

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

840 products

Tubing

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

418 products

Pipe Stub Ends

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

72 products

Garolite

A strong, machinable alternative to metal and plastic widely used in circuit boards and gears

259 products

Hose Fittings

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

993 products

Hard Fiber

Chemically treated to be hard and dense, this is the easiest composite to machine in our offering

9 products

Copper

Our most conductive metal for electrical applications—all with material certificates for traceability

8 products

Glass

Clear and highly heat and chemical resistant; often used in sights, lighting, and lab equipment

17 products

Pipe Locknuts

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

24 products

Pipe Wrenches

Grasp and turn pipe, conduit, and fittings

75 products

Manual On-Off Valves

Start and stop flow through a line

166 products

Hose

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

14 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

89 products

Air-Actuated On-Off Valves

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

8 products

Motor-Actuated On-Off Valves

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

8 products