McMaster-Carr

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.

Stretchable Sealing Caps

Unroll these caps onto the tips of cartridges, spouts, and bottles for an airtight seal.

High-Visibility Pull-Tab Caps

A vibrant yellow color makes these caps stand out. They are made of flexible rubber that conforms for a snug fit. Pull the tab for easy removal.

Capacitor Caps

Also known as capacitor boots, these caps protect capacitors and wire connections from damage to extend their service life. They also insulate wire terminal connections to help reduce accidental shocks.

Plugs

Tapered Plugs

Often used as laboratory stoppers, these rubber plugs have good impact and abrasion resistance. They’re tapered to fit a range of hole diameters.

Expandable Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters.

High-Temperature Tapered Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 570° F. All are tapered to fit a range of hole diameters.

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, they withstand temperatures up to 450° F.

Expandable High-Temperature
Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters. Good for paint baking and powder-coating applications, these plugs withstand temperatures up to 450° F.

Chemical-Resistant Tapered Plugs

These plugs have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing. Their tapered design fits a range of hole diameters.

Food-Grade Tapered Plugs

Made of FDA listed materials, these plugs are suitable for food contact. They're tapered to fit a range of hole diameters.

Miniature Pull-Through Round Plugs

Also known as mouse tails, these tiny plugs fit hole IDs as small as 0.025". They're commonly used for masking parts during finishing applications. Use the end of the plug to pull it into a through hole to form a tight seal.

High-Temperature
Pull-Through Round Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 600° F. To form a tight seal, use the smaller end of the plug to pull the larger end into a through hole.

Chemical-Resistant
Pull-Through Round Plugs

These plugs have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing. Use the smaller end of the plug to pull the larger end into a through hole to form a tight seal.

Flanged Pull-Through Round Plugs

Designed with a flange, these plugs protect countersunk holes during anodizing, electroplating, paint baking, and powder-coating applications. All withstand temperatures up to 600° F. Use the smaller end of the plug to pull the larger end into a through hole to form a tight seal.

Pull-Tab Round Plugs

A time-saving alternative to threaded plugs, these plugs press in place and have an ergonomic pull tab for quick and easy removal. Use them to temporarily protect holes in objects from contaminants during storage, painting, and light fabrication.

Sealing Plugs

With a compressible flanged top, these plugs are designed to seal the ends of copper tubing often used in water supply lines, refrigerant lines, and HVAC compressors. All are sized to fit standard copper tube dimensions.

High-Temperature Round
Plugs for NPT Pipe

These plugs withstand temperatures up to 600° F to protect internally threaded NPT connections from contaminants during electropainting, paint baking, and powder coating applications.

Push-In Panel Plugs

Push these plugs into place for a finished appearance on both sides of a panel.

Slip-On Feet

Cover the bottom of furniture legs.

Oil-Resistant Slip-On Feet

Made of neoprene rubber, these feet are a good choice for use in oily environments.

UV-Resistant Slip-On Feet

Great for use outdoors, these feet are EPDM rubber, which withstands exposure to direct sunlight.

Drain Pipe Plugs

Seal unthreaded pipe ends with these plugs. They come with a band that clamps over the outside wall of your pipe and tightens with a screwdriver.

Electrical Connectors

Caps for Safe-Break
Pin-and-Sleeve Connectors

Caps are watertight to protect safe-break plugs when not in use.

Caps for Hazardous
Location Safe-Break
Pin-and-Sleeve Connectors

Caps are watertight to protect hazardous location safe-break plugs when not in use.

Caps for High-Current
Pin-and-Sleeve Connectors

Protect high-current connectors when not in use.

Caps for Washdown
Plugs and Sockets

Protect plugs and sockets in washdown environments when not in use.

Tweezer Tip Covers

Cap the tips of your tweezers to protect them from damage. These flexible silicone covers fit most styles of tweezers.

Terms and Conditions and Privacy Policy

Caps

Chemical-Resistant Round Caps

High-Temperature Round Caps

Domed Round Caps

High-Temperature Tapered Caps