Telephone Extensions | McMaster-Carr

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Square Drive Size

Overall Length

Material

Carbide-Tipped Steel

Stainless Steel

Socket Type

Air Hammer Adapter

Dual-Drive Socket Adapter

Finger-Tightening Adapter

Hex Head Adapter

Hex Shank-to-Square Drive Adapter

Quick-Change Adapter

Ratchet Adapter

Secure-Hold Extension

Secure-Hold Socket Adapter

Spline Drive-to-Square Drive Adapter

Square Drive Size Adapter

Torque-and-Angle Measuring Adapter

Torque-Limiting Adapter

Thread Size

Finish

Aluminum Oxide Coated

Hot-Dipped Galvanized

Magnesium Phosphate Coated

Manganese Phosphate Coated

Gender

OD

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Compliant with Exemptions

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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DFARS Specialty Metals

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Sold As

Electrical Connection

1" Circular Connector

Apple Lightning

Apple Watch Charger

Apple-Compatible 30 Pin

DIN Valve Connection

DT Deutsch Style

Drive Type

Drive Style

External 12-Point

Shank Type

Quick-Change Hex

Color

Black/Red/White

Application

Arc-Flash Protection

Heat Protection

Shape

Adjustable-Angle Elbow

How can we improve?

19,075 Products

Fastening and Joining

Socket Extensions

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

Socket Adapters

Socket Adapters

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

Sockets

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

Socket Bits

Switch out worn or damaged bits instead of replacing your entire bit socket

Ratchet Wrenches

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

Bit Adapters

Connect a variety of bits to drills, powered screwdrivers, ratchet wrenches, and other turning tools

Rivet Tool Nose Extensions

Rivet Tool Nose Extensions

Add accessories to your rivet tool or replace parts

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Coupling Nuts

Connect and extend threaded rods

Hex Nuts

Handle most general fastening needs

Binding Barrel Extensions

Binding Barrel Extensions

Add length to a binding barrel

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Fabricating and Machining

Drill Bit Extensions

Drill Bit Extensions

Expand the reach of drill bits to get into deep and hard-to-reach spots

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

Tube Brush Extension Rods

Tube Brush Extension Rods

Access hard-to-reach surfaces by threading onto your tube brush

Tube Brush Handles

Tube Brush Handles

Add a loop or T-handle grip to the threaded end of your tube brush

Tube Brush Handle and Extension Kits

Tube Brush Handle and Extension Kits

Everything you need to add length and a grip to tube brushes with a threaded shank

Tube Brushes

Remove contaminants from tubes, pipes, and holes

Blowguns

Direct a stream of air to clean equipment, parts, and spaces

Polisher Arbor Extensions

Polisher Arbor Extensions

Lengthen your polisher's reach to access deep grooves and tight spots

Hole Saw Arbor Extensions

Hole Saw Arbor Extensions

Reach your hole saw into spots where your drill is too big to fit

Machine Taper Shank Extensions

Machine Taper Shank Extensions

Lengthen the reach of your machine taper shank

Machine Taper Shank Adapters

Machine Taper Shank Adapters

Convert your Morse taper arbor to fit machine spindles that are too small or large

End Mill Extensions

End Mill Extensions

Lengthen the reach of your end mill

Tap Extensions

Extend the length of your tap to cut in hard-to-reach areas

Taps

Cut internal threads for fasteners, pipe, conduit, and more

Rotary Tool Shafts

Rotary Tool Shafts

Pair with rotary tools to grind, sand, finish, and polish corners and other tight spots

Rotary Tool Guides

Rotary Tool Guides

Sharpen, grind, and sand with rotary tools at exact 45° and 90° angles

Springs for Locking Pliers

Springs for Locking Pliers

Change out worn or broken springs in the handle of your locking pliers

Electrical Power, Networking, and Controlling

Extension Cords

Extension Cords

Extend the reach of power from an outlet

USB Cords

Transfer data between computers, printers, and mobile devices

Power Cords

Connect equipment and devices to a power source

Ethernet Cords

Send data between computers, printers, servers, and switches

Extension Cord Reels

Extension Cord Reels

Keep extension cords easy to access without creating a tripping hazard

Coaxial Cords

Transmit audio, video, and data with minimal signal loss

Thermocouple Wire

Thermocouple Wire

Connect thermocouples to switches, controllers, recorders, and thermometers

HDMI Cords

Send high-definition signals to monitors, TVs, and projectors

Extension Cord Locks

Extension Cord Locks

Cover mated connectors on extension cords to prevent disconnection

Extension Cord Circuit Interrupter Converters

Extension Cord Circuit Interrupter Converters

Hardwire to extension cords to protect against electric shock in wet areas

Control Cable

Send signals to control machinery and automated systems

D-Sub Cords

Connect computers, monitors, printers, and other devices with DB connections

Power Cord Holders

Power Cord Holders

Keep extension cords, rope, hose, and chain tangle-free and ready to use

Metric Circular Cords

Metric Circular Cords

Send power and signal to equipment with metric connections

Audio Cords

Hook up speakers to an audio signal

DMX Cords

Connect to lighting equipment with five-pin XLR connections

DisplayPort Cords

DisplayPort Cords

Send video from computers to monitors and other displays

Profinet Cable

Connect devices in Profinet communication networks

Thunderbolt Cords

Thunderbolt Cords

Transmit data and video at high speeds between PCs, mobile devices, and displays

Profibus Cords

Transmit data in automation systems and other networks

Ethernet Cord Reels

Ethernet Cord Reels

Keep an ethernet cord on hand but out of the way

Fiber-Optic Cable

Fiber-Optic Cable

Transmit signals between data centers and workstations in fiber-optic networks

CAN-Bus Cable

Connect devices in CAN-Bus communication networks

Fieldbus Cable

Connect devices in Fieldbus communication networks

DeviceNet Cable

DeviceNet Cable

Connect devices in DeviceNet communication networks

Modbus Cable

Connect devices in Modbus communication networks

Security Cable

Connect low-current security and intercom systems

Coaxial Cable

Transmit audio, data, and video signals

Ethernet Cable

Send data between computers, printers, servers, and switches

Profibus Cable

Connect devices in Profibus communication networks

Breakaway Cords

Breakaway Cords

Disconnect if pulled to prevent stress on cord

Fiber-Optic Cords

Fiber-Optic Cords

Connect computers, servers, and switches in a fiber-optic network

Video Adapter Cords

Video Adapter Cords

Send video between devices with different connections

Robot Controller Cords

Robot Controller Cords

Extend the distance between a robot arm and a controller

ix Industrial Cords

ix Industrial Cords

Send data or signals between equipment, such as a servomotor and encoder

Robot Teach Pendant Cords

Robot Teach Pendant Cords

Connect robot controllers and teach pendants

Robot Teach Pendant Cord Reels

Robot Teach Pendant Cord Reels

Keep the cords connecting your robot controller and teach pendant organized and out of the way

USB Cord Locks

Keep your USB cord from shaking loose or being yanked out

Outlet Strips

Plug in multiple devices to power them from a single outlet

Power Connectors

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

RJ45 Connectors

RJ45 Connectors

Plugs, sockets, and receptacles to make Ethernet connections

USB Connectors

Plugs, sockets, receptacles, and adapters to make USB connections

Metric Circular Connectors

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

Ecomate Connectors

Ecomate Connectors

Connect machine tools, robots, and other vibrating equipment

Latching Connectors

Latching Connectors

Protect connections in wet or harsh environments while keeping them accessible

Solenoid Valve Connectors

Solenoid Valve Connectors

Sockets and receptacles to connect solenoid components, such as valves and motors

CB Radio Connectors

CB Radio Connectors

Sockets and receptacles to connect CB radios

Ballast Connectors

Ballast Connectors

Avoid exposure to live wires when replacing fluorescent ballasts

Amphenol Connectors

Amphenol Connectors

Attach wires to a circuit board

Coaxial Connectors

Coaxial Connectors

Plugs, sockets, receptacles, and adapters to make coaxial connections

DisplayPort Connectors

DisplayPort Connectors

Connect two DisplayPort cords of the same gender and connection type

Molex Connectors

Molex Connectors

Plugs, sockets, and housings for making Molex connections

Han Connectors

Plugs and sockets to make Han connections

HDMI Adapters

Convert one HDMI size or style to another

Audio Connectors

Audio Connectors

Plugs, sockets, receptacles, and adapters to make audio connections

Video Adapters

Convert from one video connection to another

Mil. Spec. Connectors

Mil. Spec. Connectors

Meet strict military standards or are compatible with Mil. Spec. connectors

ix Industrial Sockets

ix Industrial Sockets

Pair with plugs to add ix Industrial connections to printed circuit boards

AMP Connectors

Build-your-own and ready-to-use AMP connectors

Fiber-Optic Connectors

Fiber-Optic Connectors

Join fiber-optic cords that have the same gender and connection type

Breakaway Connectors

Breakaway Connectors

If pulled or stressed, these disconnect without damaging cables and equipment

Sure Seal Connectors

Sure Seal Connectors

A PVC housing keeps out liquids and dust and resists chemicals

DMX Connectors

Replace damaged plugs and sockets on lighting cables

Mini Connectors

Mini Connectors

Plugs, sockets, and receptacles send power and control signals to equipment and automated systems

Micro 360 Connectors

Micro 360 Connectors

Plugs and sockets to make control and data connections in tight spaces

D-Sub Connectors

D-Sub Connectors

Plugs, sockets, receptacles, and adapters for connecting computers, monitors, and printers

Data Connection Hubs

Data Connection Hubs

Add USB, DisplayPort, or HDMI ports to your computer to connect multiple device

USB Extenders

Increase the reach of USB devices with a transmitter and receiver

Welding Cable Connectors

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

USB Chargers

Power up mobile devices and other electronics

Outlet Box Extenders

Outlet Box Extenders

Add depth to an outlet box when there’s not enough space for components

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

Outlet Box Covers

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

Raceway and Fittings

Raceway and Fittings

Route and guard wiring along surfaces in your facility

Battery Chargers

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

Circuit Board Connectors

Circuit Board Connectors

Connect flat flexible cable to circuit boards

Facility and Grounds Maintenance

Pressure Washer Extension Wands

Pressure Washer Extension Wands

Connect to your pressure washer to spray down hard-to-reach areas

Wash Gun Nozzle Extensions

Wash Gun Nozzle Extensions

Attach to your wash gun nozzle to clean places out of arm's reach

Pole Handles

Replace handles or extend the reach on tools like brooms, paint rollers, and window washers

Sink Drain Trap Extension Tubing

Sink Drain Trap Extension Tubing

Add to a drain tailpiece when it doesn’t reach the trap

Sink Drain Traps

Sink Drain Traps

Retain a small amount of water to keep sewer gas from escaping

Downspout Extensions

Downspout Extensions

Add to downspouts to carry water away from your building's foundation

Vacuum Cleaner Attachments

Vacuum Cleaner Attachments

Add brushes, crevice tools, blower nozzles, and extension wands to your vacuum hose

Vacuum Cleaner Hose Connectors

Vacuum Cleaner Hose Connectors

Link multiple vacuum hoses or attach hose to a central vacuum system

Measuring and Inspecting

Probe Stylus Accessories

Probe Stylus Accessories

Add components that extend length, adapt threads, or hold multiple styli at once

Variance Indicator Extension Rods

Variance Indicator Extension Rods

Lengthen the reach of your variance indicator

Inside Hole Micrometer Handles

Inside Hole Micrometer Handles

Screw into your micrometer head to extend its reach for measuring deep holes

Caliper Range Extenders

Caliper Range Extenders

Expand your caliper's range to measure large items

Depth Gauge Base Extensions

Depth Gauge Base Extensions

Increase the base width of your depth gauge to measure large holes

Inspection Cameras

Inspection Cameras

Reach into tight and hard-to-access spots and stream the inspection on your phone or tablet

Inspection Mirrors

Inspection Mirrors

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

Power Transmission

Extension Springs

Extension Springs

When stretched, springs pull their ends back together

Shaft Adapters

Increase or reduce your shaft's diameter to fit equipment, or replace damaged shaft ends

Lubricating

Grease Gun Nozzles

Grease Gun Nozzles

Replace nozzles on grease guns

Grease Gun Couplers

Grease Gun Couplers

Extend the dispensing tip on grease guns to lubricate angled and hard-to-reach areas

Grease Gun Tip Adapters

Grease Gun Tip Adapters

Quickly switch between standard, button-head, and flush-style grease fittings

Grease Gun Accessory Kits

Grease Gun Accessory Kits

Adapt and extend dispensing tips and install grease fittings with an assortment of tools

Grease Fittings

Grease Fittings

Create an inlet on equipment and machinery for injecting lubricant; also known as Zerk fittings

Grease Fitting Repair Tools

Grease Fitting Repair Tools

Remove and repair broken or clogged grease fittings and re-tap threaded holes

Grease Fitting Manifolds

Grease Fitting Manifolds

Lubricate multiple points with the same amount and type of grease using one grease fitting

Safety Equipment

Fall-Arrest Extension Straps

Fall-Arrest Extension Straps

Hook to the D-ring on your harness to make it easier to attach a fall-arrest lanyard

Face Mask Strap Extenders

Face Mask Strap Extenders

Reduce pressure on your ears for long-lasting comfort

Communication

Telephone Cords

Telephone Cords

Connect telephones to data outlets

Material Handling

Conveyor Brackets

Conveyor Brackets

Mount guide clamps, sensors, drip pans, and other attachments to conveyor frames

Conveyors

Roller, skate wheel, ball transfer, belt, and vacuum conveyors

Conveyor Guide Clamps

Conveyor Guide Clamps

Connect conveyor guides to each other and secure them in place

Extension Planks

Extension Planks

Adjust length to span ladder jacks and other supports to build your own scaffold

Ladder Extensions

Ladder Extensions

Grab to climb safely from the top of a ladder onto a roof or other elevated surface

Ladders

Wall-mount, rolling platform, and step ladders

Robot Tool Extensions

Robot Tool Extensions

Attach extensions to robot arms

Robot Mounts

Secure your robot arm to benches, frames, or other surfaces

Valve Stem Extensions

Valve Stem Extensions

Add length to the stem of tire valves

Valve Stems

Snap into tubeless tire rims to create an air inlet

Forklift Fork Extensions

Forklift Fork Extensions

Add length to forklift forks to support large loads

Containers, Storage, and Furniture

Hose Reels

Store hose neatly to remove tripping hazards and reduce wear

Aerosol Spray Straws

Aerosol Spray Straws

Direct streams from aerosol cans for precise applications

Sprayers

Pressurize liquids such as disinfectants, cleaners, and insecticides to dispense as spray

Spray Bottles

Store and spray liquids

Aerosol Spray Extensions

Aerosol Spray Extensions

Snap onto aerosol spray cans to extend their reach

Hydraulic Lifts

Hydraulic Lifts

Convert fixed-height workbenches into adjustable-height workbenches

Sealing

Caulk Gun Nozzles

Caulk Gun Nozzles

Attach to caulk guns to change the shape and amount of sealant that's dispensed

Lighting

Light Socket Adapters

Light Socket Adapters

Convert light fixtures to accept different bulbs

Light Sockets

Install or replace sockets in fixtures for standard household, tubular, compact, or miniature bulbs

Light Poles

Bring light to your parking lot or walkway in minutes

Building and Machinery Hardware

Adjustable Handles

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

Crank Handles

The offset handle gives extra leverage to maximize turning force

Steering Wheel Extensions

Steering Wheel Extensions

Bring steering wheels closer to you when your reach or mobility is limited

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

Fluid Handling

Thermocouple Cords

Thermocouple Cords

Extend the reach of thermocouple probes

Air Nozzles

Blow concentrated air for cleaning, drying, cooling, and ejecting parts

Heating, Ventilation, and Air Conditioning

Duct Adjustment Sleeves

Duct Adjustment Sleeves

Fine-tune the length of your duct without precise measuring and cutting

Temperature-Controlled Outlet Adapters

Temperature-Controlled Outlet Adapters

Automatically turn heating and cooling devices on and off as temperatures rise and fall

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)