Electrical Closure Caps | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

	Material Material

Aluminum

Stainless Steel

Zinc

	Finish Finish

Cadmium Plated

Anodized

Epoxy Coated

	For Thread Location For Thread Location

External

Internal

	Thread Location Thread Location

External

Internal

	Minimum Temperature Minimum Temperature

	Maximum Temperature Maximum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Color Color

	Green
	Black
	Gray

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

	For Face Diameter For Face Diameter

0.55"

0.7"

0.8"

	For Connector Type For Connector Type

Plug

Socket

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38 Products

Caps for Mini Connectors

External Thread

Internal Thread

Protect mini connectors when not in use.

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

	Thread
For Face Dia.	Size	Type	Material	Color	Temp. Range, °F		Each
External Thread
0.55"	7/8"-16	UNS	Epoxy-Coated Zinc	Black	0° to 220°	00000000	000000
0.7"	1"-16	UNS	Epoxy-Coated Zinc	Black	0° to 220°	00000000	00000
0.8"	1 1/8"-16	UNS	Epoxy-Coated Zinc	Black	0° to 220°	00000000	00000
Internal Thread
0.55"	7/8"-16	UNS	Anodized Aluminum	__	0° to 220°	00000000	00000
0.7"	1"-16	UNS	Anodized Aluminum	__	0° to 220°	00000000	00000
0.8"	1 1/8"-16	UNS	Anodized Aluminum	__	0° to 220°	00000000	00000

Adapters for Harsh Environment Mini Connectors

Join two connectors that both have internal threads.

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

Thread
Size	Type	Material	Temp. Range, °F		Each
External Thread
7/8"-16	UNS	Stainless Steel	-55° to 390°	00000000	00000
1"-16	UNS	Stainless Steel	-55° to 390°	00000000	00000
1 1/8"-16	UNS	Stainless Steel	-55° to 390°	00000000	00000

Caps for Harsh Environment Mini Connectors

External Thread

Internal Thread

Protect mini connectors when not in use. These caps are stainless steel for excellent corrosion resistance.

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

	Thread
For Face Dia.	Size	Type	Material	Temp. Range, °F		Each
External Thread
0.55"	7/8"-16	UNS	Stainless Steel	0° to 220°	00000000	000000
0.7"	1"-16	UNS	Stainless Steel	0° to 220°	00000000	00000
0.8"	1 1/8"-16	UNS	Stainless Steel	0° to 220°	00000000	00000
Internal Thread
0.55"	7/8"-16	UNS	Stainless Steel	0° to 220°	00000000	00000
0.7"	1"-16	UNS	Stainless Steel	0° to 220°	00000000	00000
0.8"	1 1/8"-16	UNS	Stainless Steel	0° to 220°	00000000	00000

Adapters for Mini Connectors

Join two connectors that both have internal threads.

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

Thread
Size	Type	Material	Temp. Range, °F		Each
External Thread
7/8"-16	UNS	Aluminum	-4° to 190°	00000000	00000
1"-16	UNS	Aluminum	-4° to 190°	00000000	0000
1 1/8"-16	UNS	Aluminum	-4° to 190°	00000000	0000

Caps for Micro M12 Screw-Together Connectors

For Plugs

For Sockets

Protect M12 connectors when not in use.

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

Thread
Size	Pitch, mm	Type	Location	Material	Color	Temp. Range, °F		Each
For Plugs
M12	1	Metric	Internal	Anodized Aluminum	Black	0° to 220°	0000000	000000
1/2"-20	__	UNF	Internal	Anodized Aluminum	__	0° to 220°	0000000	00000
For Sockets
M12	1	Metric	External	Anodized Aluminum	Black	0° to 220°	0000000	00000
1/2"-20	__	UNF	External	Anodized Aluminum	Gray	0° to 220°	0000000	00000

Caps for Harsh Environment Micro M12 Screw-Together Connectors

For Plugs

For Sockets

Protect harsh environment M12 connectors when not in use. These caps are stainless steel for excellent corrosion resistance.

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

Thread
Size	Pitch, mm	Type	Location	Material	Temp. Range, °F		Each
For Plugs
M12	1	Metric	Internal	Stainless Steel	0° to 220°	0000000	000000
1/2"-20	__	UNF	Internal	Stainless Steel	0° to 220°	0000000	00000
For Sockets
M12	1	Metric	External	Stainless Steel	0° to 220°	0000000	00000
1/2"-20	__	UNF	External	Stainless Steel	0° to 220°	0000000	00000

Caps for Mil. Spec. Screw-Together Connectors

External Thread

Internal Thread

Protect Mil. Spec. connectors when not in use.

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

Thread
Size	Type	Material	Temp. Range, °F		Each
External Thread
5/8"-24	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
7/8"-20	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1"-20	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 1/8"-18	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 1/4"-18	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 3/4"-18	UNS	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
Internal Thread
5/8"-24	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
7/8"-20	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1"-20	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 1/8"-18	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 1/4"-18	UNEF	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000
1 3/4"-18	UNS	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000