UNS Plugs | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Thread Type Thread Type	Show

UNS

	Thread Type Thread Type	Hide

BSF

BSPP

BSPT

Chicago Fire Department

	For OD For OD

	For Shape For Shape

	Round

	Cap Type Cap Type

	Screw On

	Material Material

	Color Color

	Black
	Green
	Red

	Inside Height Inside Height

	Profile Profile

	Straight

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

	Maximum Temperature Maximum Temperature

100° to 249° F

250° to 499° F

	Minimum Temperature Minimum Temperature

	Type Type

	Adapter

	For Connection Type For Connection Type

Straight-Thread Pipe

	Flexibility Flexibility

Rigid

	Shape Shape

	Straight

	Thread Location Thread Location

External

Internal

	For Thread Location For Thread Location

Internal

External

	For Number of Keyways For Number of Keyways

	For Face Diameter For Face Diameter

0.55"

0.7"

0.8"

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27 Products

Threaded Caps

Plastic

Protect externally threaded components from contaminants during fabrication and storage.

Plastic caps resist corrosion better than aluminum caps.

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

Thread
Size	Type	For OD	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
Plastic
For Straight-Thread Pipe
1/4"-36	UNS	1/4"	7/32"	150°	Red	100	00000000	00000
7/16"-24	UNS	7/16"	19/64"	150°	Red	100	00000000	0000
3/4"-18	UNS	3/4"	11/16"	150°	Red	100	00000000	00000
7/8"-18	UNS	7/8"	25/32"	150°	Red	100	00000000	00000
1"-14	UNS	1"	25/32"	150°	Red	100	0000000	00000
1 1/16"-14	UNS	1 1/16"	3/4"	150°	Red	100	00000000	00000

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 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	0° to 220°	00000000	00000
1"-16	UNS	Aluminum	0° to 220°	00000000	0000
1 1/8"-16	UNS	Aluminum	0° to 220°	00000000	0000

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 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 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
1 3/4"-18	UNS	Cadmium-Plated Aluminum	-65° to 255°	0000000	000000
Internal Thread
1 3/4"-18	UNS	Cadmium-Plated Aluminum	-65° to 255°	0000000	00000

Caps for Washdown USB Cords

Screw-Together Cap

Screw these caps onto the socket end of washdown USB cords.

Screw-together caps maintain an IP67 rating when cords are not in use.

	Thread
Housing Connection Type	Size	Type	Material	Environment	Environmental Rating	Color		Each
Screw Together	13/16"-28	UNS	Plastic	Dusty, Submersible, Washdown	IP67	Black	000000	00000