Blue Plugs | McMaster-Carr

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Stainless Steel

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29/64" to 31/64"

31/64" to 35/64"

33/64" to 19/32"

Shape

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Fitting Type

Electrical Connection

1" Circular Connector

Apple Lightning

Apple Watch Charger

DIN Valve Connection

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Maximum Temperature

100° F to 249° F

250° F to 499° F

500° F to 999° F

For Use With

Diesel Exhaust Fluid

Electrical Connection Coding

REACH

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Compliant with Exemptions

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

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1,566 Products

Most Likely Products

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Pipe and Fittings

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

Metric Circular Cords

Metric Circular Cords

Send power and control signals to equipment with metric connections

Power Connectors

Power Connectors

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

All Results

Building and Machinery Hardware

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Protective Caps

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

Vibration-Damping Mounts

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

Electrical Power, Networking, and Controlling

Power Connectors

Power Connectors

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

Metric Circular Receptacles

Metric Circular Receptacles

Install in walls and panels and pair with plugs to make metric connections

Molex Plug and Socket Sets

Molex Plug and Socket Sets

Come with wire leads installed for quick additions to existing Molex systems

Mini Receptacles

Mini Receptacles

Install in walls and panels and pair with plugs to send power and signal

Strain-Relief Connector Boots

Strain-Relief Connector Boots

Protect connectors and cords from strain, bends, and pulls

AMP Plug and Socket Sets

AMP Plug and Socket Sets

Come with wire leads installed for quick additions to existing AMP systems

RJ45 Connector Repair Clips

RJ45 Connector Repair Clips

Snap onto broken Ethernet plugs to restore their ability to make secure connections

D-Sub Connectors

D-Sub Connectors

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

RJ45 Sockets

Pair with plugs to make Ethernet connections

Han Connectors

Plugs and sockets to make Han connections

Micro 360 Connectors

Micro 360 Connectors

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

USB Adapters

Connect mismatched USB cords and devices

Latching Connector Inserts

Latching Connector Inserts

Male and female inserts for making connections inside hoods and bases

Power Connector Caps

Power Connector Caps

Cover pin-and-sleeve power connectors when they're not in use

Metric Circular Cords

Metric Circular Cords

Send power and control signals to equipment with metric connections

Mini Cords

Often used to send power and control signals to automated systems, motors, and pumps

USB Cords

Transfer data between computers, printers, and mobile devices

Ethernet Cords

Send data between computers, printers, servers, and switches

D-Sub Cords

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

Solenoid Valve Cords

Solenoid Valve Cords

Connect solenoid components, such as valves and motors

Sensor Signal Adapter Cords

Sensor Signal Adapter Cords

Send data between sensors and receivers that have different signal types

Coaxial Cords

Transmit audio, video, and data with minimal signal loss

Extension Cords

Extension Cords

Extend the reach of power from an outlet

Terminals

Attach wire endings everywhere from circuit breaker panels to batteries

Terminal Blocks

Terminal Blocks

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

Wire Taps

Connect a tap wire to a main wire without stripping

Binding Posts

Test circuits before making permanent connections

Outlet Strips

Plug in multiple devices to power them from a single outlet

Electrical Contact Installation Tools

Electrical Contact Installation Tools

Add pin-and-sleeve contacts to connectors

Development Board Cords

Development Board Cords

Connect your development board to components such as sensors and actuators

Cable Entry Panels

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

Fluid Handling

Pipe and Fittings

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

Hose

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

Expansion Plugs

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

Safety Equipment

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

Lubricating

Grease Fitting Caps

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

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