Electrical Closure Caps | McMaster-Carr

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37 Products

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

Thread Adapters for Mini Connectors

Thread Adapter

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 Mini Connectors

External Thread with Lanyard

Internal Thread with Lanyard

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	Includes		Each
External Thread
0.55"	7/8"-16	UNS	Epoxy-Coated Zinc	Black	0° to 220°	Lanyard	00000000	000000
0.8"	1 1/8"-16	UNS	Epoxy-Coated Zinc	Black	0° to 220°	Lanyard	00000000	00000
Internal Thread
0.55"	7/8"-16	UNS	Anodized Aluminum	__	0° to 220°	Lanyard	00000000	00000
0.7"	1"-16	UNS	Anodized Aluminum	__	0° to 220°	Lanyard	00000000	00000
0.8"	1 1/8"-16	UNS	Anodized Aluminum	__	0° to 220°	Lanyard	00000000	00000

Thread Adapters for Harsh Environment Mini Connectors

Thread Adapter

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 with Lanyard

Internal Thread with Lanyard

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

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	000000
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