For Pipe Size 1/8 Caps | McMaster-Carr

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8 Products

Tapered Caps

These flexible plastic caps are tapered to fit a variety of unthreaded and threaded objects.

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

Caps for Unthreaded Pipe and NPT Tapered-Threaded Pipe

Flexible Polyethylene Plastic
For OD	For Pipe Size	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
0.356"-0.422"	1/8	3/8"	150°	Red	100	0000000	00000

High-Temperature Tapered Caps

Made of silicone, these caps withstand temperatures of 450° F for electroplating, paint-baking, and powder-coating applications. All of these flexible caps are tapered to fit a variety of unthreaded and threaded objects.

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

For Unthreaded Pipe and NPT Tapered-Thread Pipe
For OD	For Pipe Size	For Thread Type	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
Flexible Silicone Rubber
0.111"-0.177"	1/8	NPT	0.38"	450°	Red	10	0000000	00000

Squeeze Top Caps

Squeeze the dome top to remove these caps. Commonly used as thread protectors, they are made of flexible vinyl that conforms for a snug fit.

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

Flexible Vinyl Plastic
For OD	For Thread Dia.	For Pipe Size	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
Caps for Straight-Thread Pipe, NPT Tapered-Thread Pipe, and Unthreaded Pipe
0.338"	3/8"	1/8	1/2"	180°	Red	100	0000000	00000

Tear-Tab Caps

Push these caps onto pipe and fittings, then tear their tab to break the seal for easy removal.

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

Rigid Polyethylene Plastic
For OD	For Pipe Size	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
For NPT Tapered-Thread Pipe and Unthreaded Pipe
0.385"	1/8	5/16"	150°	Blue	100	0000000	00000

Round Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes.

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

Vinyl Plastic
For ID	For Thread Dia.	For Pipe Size	Ht.	Flange Dia.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
For NPT Tapered-Thread Pipe and Straight-Thread Pipe
0.39"	3/8"	1/8	3/8"	17/32"	180°	Durometer 75A	Red	100	0000000	00000

Hollow Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Use the flange to remove them with ease.

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

Polyethylene Plastic
For Pipe Size	For Thread Dia.	For ID	Ht.	Flange Dia.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
For Unthreaded and Straight-Thread Pipe
1/8	5/16"	0.236"-0.302"	3/8"	7/16"	150°	Durometer 45D	Red	100	0000000	00000

Pull-Ring Tapered Plugs

Pull the two built-in rings to quickly remove these plugs. All are tapered to fit a range of hole diameters.

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

Polyethylene Plastic
For Pipe Size	For ID	Ht.	Ring Dia.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
For NPT Tapered-Thread Pipe
1/8	11/32"-3/8"	1/4"	3/4"	150°	Durometer 43D	Blue	100	00000000	00000

Hollow High-Temperature Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 450° F for 20 minutes. Use the flange to remove them with ease.

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

Silicone Rubber
For Pipe Size	For ID	Ht.	Flange Dia.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
1/8	0.116"-0.182"	3/8"	11/32"	450°	Durometer 70A	Red	10	0000000	00000