Cast Iron Plugs | McMaster-Carr

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	Material Material

Iron

	Body Material Body Material

Iron

	Pipe Size Pipe Size

1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
6
8

	Thread Type Thread Type

BSPT

NPT

	Type Type

	Cap		Plug

	Drive Style Drive Style


External Square	Square

Slotted

	Finish Finish

	For Pipe Material For Pipe Material

Galvanized Steel

Steel

	For Pipe Schedule For Pipe Schedule


40	80

	For Use With For Use With

	Pressure Class Pressure Class

125

150

300

	Shape Shape


Cap/Plug	Straight

	Connection Style Connection Style

Threaded

Clamp On

Claw

	Plug Construction Plug Construction

Solid

Hollow

	Maximum Pressure Maximum Pressure

	Gender Gender

Male

Female

	System of Measurement System of Measurement

Inch

	Length Length

	Connection Type Connection Type


Hose	Pipe

	Specifications Met Specifications Met

	Maximum Steam Pressure Maximum Steam Pressure

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Fitting Material Fitting Material

Iron

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141 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

Low-Pressure Cast Iron Threaded Pipe Fittings

Low-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.

Medium-Pressure Iron and Steel Threaded Pipe Fittings

For use in noncorrosive environments, these fittings have better strength than our low-pressure iron and steel pipe fittings.

Medium-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.

Grooved-End Iron Pipe Fittings

The grooved ends on these iron fittings connect to pipe with a clamp to easily install piping systems.

Twist-Claw Hose Couplings for Air and Water

Couplings have an identical claw-style head that connects to another twist-claw hose coupling with a quarter twist.

Weather-Resistant Breather Vents

Shield outdoor pipe and tank openings from the environment. Also known as vent caps, these breather vents have screens to allow air flow while blocking debris.

Cord Grips

Steel and Iron Cord Grips

Stronger than aluminum cord grips, these grips are zinc plated for corrosion resistance.

Steel and Iron Wet-Location Cord Grips

Stronger than aluminum cord grips, these grips are zinc plated for corrosion resistance. They have a steel locknut and metal-reinforced O-ring that prevents liquid from entering the connection.

Locking Fill Caps for Drums

Prevent tampering with the contents of your drum while allowing access for filling.

Galvanized Iron and Steel Slip-On Framing and Fittings

To provide corrosion resistance in wet environments, this framing is galvanized.