Metric Hole Plugs | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Type Thread Type

BSPP

Metric

	Material Material

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Environment Environment

	Environmental Rating Environmental Rating

	Seal Material Seal Material

Rubber

	Head Diameter Head Diameter

	Specifications Met Specifications Met

CSA

FDA Compliant

UL 94

	For Shape For Shape


Round	Rectangle

	Plug Type Plug Type


Snap In	Screw In

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Drive Style Drive Style

	External Hex

	Color Color

	Black
	Gray
	Yellow

	Profile Profile

	Straight

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

REACH Compliant

	Height Height

	For Surface Type For Surface Type

Threaded

	For Connection Type For Connection Type

Straight-Thread Pipe

	Head Width Head Width

	Head Length Head Length

45 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.

Threaded Round Plugs for Straight-Thread Pipe

Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.

Nylon plugs resist chemicals better than aluminum plugs and are more wear resistant than polyethylene plugs. You can install them manually or with a hex-head wrench or socket.

For technical drawings and 3-D models, click on a part number.

Nylon with External Hex Drive

Nylon

Thread
Size	Pitch, mm	Ht., mm	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
M10	1	7	150°	Durometer 55D	Yellow	50	0000000	000000
M12	1.5	10	150°	Durometer 55D	Yellow	50	0000000	00000
M14	1.5	10	150°	Durometer 55D	Yellow	50	0000000	00000
M16	1.5	10	150°	Durometer 55D	Yellow	50	0000000	00000
M18	1.5	10	150°	Durometer 55D	Yellow	50	0000000	00000
M20	1.5	10	150°	Durometer 55D	Yellow	25	0000000	00000
M22	1.5	10	150°	Durometer 55D	Yellow	25	0000000	00000
M24	1.5	12	150°	Durometer 55D	Yellow	25	0000000	00000
M26	1.5	10	150°	Durometer 55D	Yellow	10	0000000	00000
M27	2	13	150°	Durometer 55D	Yellow	10	0000000	00000
M33	2	13	150°	Durometer 55D	Yellow	10	0000000	00000

Snap-In Rectangular Plugs

Flexible ridges securely hold these plugs in place and allow them to fit a range of hole sizes.

For technical drawings and 3-D models, click on a part number.

For Inside			Head
Lg.	Wd.	Ht.	Lg.	Wd.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
Polyethylene Plastic
46mm-48mm	30mm-32mm	20mm	50mm	34mm	150°	Durometer 50D	Black	25	00000000	000000
54mm-57mm	24mm-27mm	15mm	60mm	30mm	150°	Durometer 50D	Black	25	00000000	00000
72mm-73mm	22mm-23mm	18mm	75mm	25mm	150°	Durometer 50D	Black	25	00000000	00000
72mm-75mm	32mm-35mm	24mm	80mm	40mm	150°	Durometer 50D	Black	10	00000000	0000
92mm-96mm	42mm-46mm	16mm	100mm	50mm	150°	Durometer 50D	Black	10	00000000	00000

Threaded Hole Plugs

PG and Metric

Close off unused threaded holes in enclosures and outlet boxes.

Hole plugs rated IP54 protect against dust and splashing water.

For technical drawings and 3-D models, click on a part number.

Metric
Thread Size	Thread Pitch, mm	Head Dia.	Material	Environmental Rating	Specifications Met		Each
M12	1.5	9/16"	Nickel-Plated Brass	IP54	CSA Certified, UL Listed	0000000	00000
M16	1.5	11/16"	Nickel-Plated Brass	IP54	CSA Certified, UL Listed	0000000	0000
M20	1.5	7/8"	Nickel-Plated Brass	IP54	CSA Certified, UL Listed	0000000	0000
M25	1.5	1 1/8"	Nickel-Plated Brass	IP54	CSA Certified, UL Listed	0000000	0000

Sanitary Threaded Hole Plugs

Plug (Front View)

Plug (Back View)

FDA compliant for use near food, these plugs close off unused holes in equipment such as electrical enclosures to keep out debris and water. They have a smooth finish and round edges, leaving no crevices for contaminants to collect in. Made of 316L stainless steel, they won’t corrode from harsh cleaners. A silicone seal blocks out dust and liquid.

For technical drawings and 3-D models, click on a part number.

Thread
Size	Pitch, mm	Head Diameter, mm	Material	Seal Material	Environmental Rating	Specifications Met	Features		Each
Metric
M10	1.5	19.7	316L Stainless Steel	Silicone Rubber	IP66	FDA Compliant 21 CFR 177.2600	Round Edges, Smooth Finish	00000000	00000

Threaded Submersible Hole Plugs

Close off unused threaded holes to prevent water from entering your enclosures and outlet boxes. Plugs are rated IP68 for protection from water submersion.

For technical drawings and 3-D models, click on a part number.

Metric
Thread Size	Thread Pitch, mm	Head Dia.	Material	Environmental Rating	Specifications Met	Color		Each
M12	1.5	5/8"	Nylon Plastic	NEMA 4X; IP68	UL 94 V-2	Gray	0000000	00000
M16	1.5	13/16"	Nylon Plastic	NEMA 4X; IP68	UL 94 V-2	Gray	0000000	000
M20	1.5	1"	Nylon Plastic	NEMA 4X; IP68	UL 94 V-2	Gray	0000000	000
M25	1.5	1 5/16"	Nylon Plastic	NEMA 4X; IP68	UL 94 V-2	Gray	0000000	0000

Surface-Mount Receptacles for Quick-Release Pins

Oval

When you can't drill a through hole, use one of these flanged receptacles to provide a permanent, blind hole for a quick-release pin. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance.

Receptacles that are passivated offer added protection against corrosion and oxidation.

For technical drawings and 3-D models, click on a part number.

				Mounting Flange
For Pin Dia.	Barrel OD	Overall Lg.	Mounting Hole Thread Size	Wd.	Ht.	Usable Lg. Reduction	Material	Passivation		Each
Metric
Oval
6mm	9.5mm	16.5mm	M4	15.88mm	31.8mm	10mm	18-8 Stainless Steel	Passivated	000000000	000000
8mm	11.9mm	19.9mm	M4	15.88mm	31.8mm	13mm	18-8 Stainless Steel	Passivated	000000000	00000
10mm	14.3mm	23.2mm	M4	15.88mm	31.8mm	15mm	18-8 Stainless Steel	Passivated	000000000	00000
12mm	19.1mm	30.4mm	M5	22.2mm	38.1mm	20mm	18-8 Stainless Steel	Passivated	000000000	00000

Thread-In Receptacles for Quick-Release Pins

Use a screwdriver to install these receptacles in a threaded hole. Use them to secure quick-release pins when you can't drill a through hole. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance, and passivated for added protection against corrosion and oxidation.

For technical drawings and 3-D models, click on a part number.

Metric
For Pin Dia.	Barrel OD	Overall Lg.	Usable Lg. Reduction	Thread Size	Thread Pitch	Material		Each
5mm	10mm	14mm	3mm	M10	1.5mm	18-8 Stainless Steel	000000000	000000
6mm	12mm	14mm	3mm	M12	1.75mm	18-8 Stainless Steel	000000000	00000
8mm	14mm	16mm	3mm	M14	2mm	18-8 Stainless Steel	000000000	00000
10mm	18mm	18mm	5mm	M18	2.5mm	18-8 Stainless Steel	000000000	00000
12mm	20mm	19mm	6mm	M20	1.5mm	18-8 Stainless Steel	000000000	00000
16mm	24mm	24mm	6mm	M24	2mm	18-8 Stainless Steel	000000000	00000

Retaining Caps for Quick-Release Pins

Press a retaining cap onto the end of a pin to hold it in a hole that's oversized or out of round. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance.

Caps that are passivated offer added protection against corrosion and oxidation.

For technical drawings and 3-D models, click on a part number.

Caps

Metric
For Pin Dia.	Cap OD	Overall Lg.	Usable Lg. Reduction	Material	Passivation		Each
6mm	9.5mm	14.7mm	3mm	18-8 Stainless Steel	Passivated	000000000	000000
8mm	12.7mm	15.9mm	3mm	18-8 Stainless Steel	Passivated	000000000	00000
10mm	14.3mm	18.5mm	5mm	18-8 Stainless Steel	Passivated	000000000	00000
12mm	19.1mm	25.4mm	6mm	18-8 Stainless Steel	Passivated	000000000	00000
16mm	25.4mm	31.8mm	6mm	18-8 Stainless Steel	Passivated	000000000	00000

Threaded Hose Fittings for Hydraulic Fluid

Fittings are threaded on both ends so you can connect them directly to a threaded hose or to pumps, cylinders, and other equipment in your hydraulic system.

Zinc-plated steel fittings are stronger and more durable than stainless steel fittings. They have fair corrosion resistance. Fittings that swivel until tightened rotate for easy installation.

BSPP threads have a gasket or a 60° internal flare to protect against leaks.

For technical drawings and 3-D models, click on a part number.

Caps (Swivels Until Tightened), BSPP Female Hose

Maximum Pressure: See table
Temperature Range: -20° to 230° F

Zinc-Plated Steel
Pipe Size	Dash Size	Max. Pressure		Each
1/4	04	6,000 psi @ 72° F	0000000	00000
3/8	06	5,500 psi @ 72° F	0000000	0000
1/2	08	4,500 psi @ 72° F	0000000	0000
3/4	12	3,500 psi @ 72° F	0000000	0000
1	16	3,000 psi @ 72° F	0000000	00000