Electrical Insulation | McMaster-Carr

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Electrical Insulating

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200 V/mil to 400 V/mil

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215 V/mil

250 V/mil

254 V/mil

275 V/mil to 350 V/mil

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320 V/mil to 450 V/mil

335 V/mil

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For Use With

Stainless Steel Screws

For Use Outdoors

Comparable To

12,102 Products

Most Likely Products

Garolite

A strong, machinable alternative to metal and plastic widely used in circuit boards and gears

1,592 products

Plastic

A lightweight alternative to metal and glass

7,706 products

Fiberglass

A lightweight alternative to metal and wood widely used in electrical and structural applications

210 products

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

267 products

Mica

An electrical insulator that resists high temperatures; use in circuit breakers and heating elements

199 products

All Results

Raw Materials

Garolite

A strong, machinable alternative to metal and plastic widely used in circuit boards and gears

1,592 products

Fiberglass

A lightweight alternative to metal and wood widely used in electrical and structural applications

210 products

Hard Fiber

Chemically treated to be hard and dense, this is the easiest composite to machine in our offering

35 products

Plastic

A lightweight alternative to metal and glass

7,706 products

Mica

An electrical insulator that resists high temperatures; use in circuit breakers and heating elements

199 products

Electrical Power, Networking, and Controlling

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

822 products

Wire Sleeving

Bundle wiring and protect from abrasion and heat

121 products

Electrical Tape

Insulate wire and cable splices, wrap wire harnesses, and repair cable jacketing

125 products

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

22 products

Heat-Shrink Tubing Seal Wrap

Wrap around wire like tape to create a moisture resistant seal before adding heat-shrink tubing

5 products

Cold-Shrink Tubing

Conforms to wire and cable without heat, creating a permanent, watertight seal

17 products

Heat-Shrink Tubing Splitters

Insulate and seal where wire splits off from cable; also known as breakout boots

23 products

Cold-Shrink Tubing End Caps

Seal crimped electrical connections without heat or tools to protect against moisture

4 products

Electrical Insulating Varnish

Coat wire and other metal electrical parts to protect them from oil, chemicals, and moisture

6 products

Electrical Insulating Wire Caps

Cover live wire ends to protect against shock from accidental contact

3 products

Thermal Interface Tape

Made of polyimide to isolate electricity while the silicone rubber conducts heat

6 products

Grounding Rings

Create a pathway for stray currents to prevent damage to bearing surfaces in AC motors

22 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

13 products

Cable Repair Resins

Protect and insulate electrical cables and repair damaged insulation

8 products

Terminal Covers

Block out dirt and corrosion to protect battery terminals

19 products

Conductive Tape

Shield cables and electronic components from electromagnetic interference (EMI)

59 products

Wire and Cable Strippers

Remove the outer insulation on wire and cable

9 products

Capacitor Boots

Shield capacitors and wire connections to extend their service life and reduce accidental shocks

3 products

Fastening and Joining

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

267 products

Screwdrivers

Tighten and loosen screws

113 products

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

16 products

Nutdrivers

Tighten and loosen nuts and bolts

16 products

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

2 products

L-Keys

Turn fasteners from either end and reach into tight spots

17 products

Screw Starters

Grip and start turning screws that are too small to hold or located in hard-to-reach spots

3 products

Tool Sets

Secure fasteners and complete a variety of other maintenance tasks

1 product

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

2 products

Bit Sockets

Turn fasteners with an internal drive style without slipping and damaging the drive

9 products

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

5 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

12 products

Socket Adapters

Make your socket more versatile, from converting the drive to limiting torque

4 products

Box Wrenches

Grip all sides of a fastener to prevent slipping

6 products

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

4 products

Adjustable Wrenches

Adjust the jaws to fasten different size nuts, bolts, or workpiece

6 products

Retaining Ring Pliers

Install and remove rings inside a bore or around a shaft

1 product

Masking Tape

Temporarily join or protect surfaces

112 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

27 products

Heating, Ventilation, and Air Conditioning

Insulation Sheets

Line the walls of furnaces, freezers, ductwork, and buildings to keep heat in or out

1 product

Pipe Insulation

Fit around pipe, tubing, and tanks to reduce heat loss or condensation

21 products

Fluid Handling

Thermocouple Insulating Sleeves

Protect thermocouple wire in extreme-temperature applications, such as die casting and heat treating

13 products

Safety Equipment

Electrical Protection Blankets

Wrap around power lines and electrical equipment to shield workers from high voltage

6 products

Fabricating and Machining

Picks

Hold, separate, and position small parts such as wire and springs

5 products

Cable Cutters

Slice through electrical, data, armored, coaxial, and fiber-optic cable

1 product

Wire Cutters

Snip through various types of wire, even hardened and steel-reinforced wire

3 products

End Cutters

Wide jaws cut steel wire, nails, and small rivets close to the surface; also known as nippers

1 product

Pipe, Tube, and Hose Cutters

Make clean cuts in pipe, tube, hose, and conduit

1 product

Pliers Sets

A variety of pliers styles and sizes for whatever job comes up

2 products

Long-Nose Pliers

Grab, bend, and position wire and other small parts

9 products

Wire-Forming Pliers

Loop and bend wire; also known as round-nose pliers

1 product

Scissors

Cut through a wide range of materials from paper and plastic to carpet and Kevlar

1 product

Bolt Cutters

Snip metal chain, bolts, rods, rivets, wire, and padlocks

2 products

Slip-Joint Pliers

Adjust the pivot point to switch between two different jaw opening sizes

2 products

Wire-Gripping Pliers

Pull, bend, and cut wire; also known as lineman's pliers

6 products

Adjustable Pliers

A range of jaw positions for turning fasteners and gripping workpieces

7 products

Files

Debur, polish, and sharpen nearly any material

1 product

Pry Bars

Slide under heavy objects to pry, lift, and position them

1 product

Hacksaws

Blades have more teeth per inch than handsaws to cut through metal and plastic more smoothly

1 product

Material Handling

Low-Friction Tape

Create a slippery lining to keep parts moving or use as a release surface on heat sealers and molds

284 products

Conveyor Brushes

Position items on conveyor belts and wipe off debris

12 products

Lubricating

Grease

Thicker than oil to evenly lubricate surfaces and stay in place

29 products

Measuring and Inspecting

Caliper Battery Covers

Protect the battery inside your caliper

8 products

Inspection Mirrors

Reach around corners and obstructions to inspect hard-to-see areas

1 product

Power Transmission

Ball Bearings

Create less friction than other bearings for use at high speeds

27 products

Building and Machinery Hardware

Edge Trim

Install on panels, boards, signs, and mirrors to protect edges from impact

4 products

Protective Film and Tape

Adhere to surfaces to keep them free of scratches, chemicals, moisture, and germs

3 products