Metric Guides | McMaster-Carr

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Round with Support Rail

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Compliant with Exemptions

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Specifications Met

Federal Specification

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UL 2034

For Rigid Conduit Trade Size

Thread Length

8,147 Products

Power Transmission

Track Rollers

Support and carry objects as they move along conveyor systems

200 products

Drive Rollers

Transmit power from motors to systems like conveyors; also known as contact wheels and feed rollers

14 products

Spline Bearings

Add to splines to transfer rotary power or move loads along the shaft

25 products

Linear Bearings

Minimize friction as parts move along a shaft

296 products

Linear Bearing Brakes

Lock bearings in place on a shaft for precise positioning

4 products

Shaft Supports

Support linear motion shafts to prevent bending and rolling under loads

72 products

Positioning Slides

A lead screw drives the carriage for accurate positioning in laboratory and production equipment

21 products

Air Slides

Convey grippers, printing heads, and other loads back and forth on a carriage

104 products

Ball Screw Nuts

Internal ball bearings roll on ball screws for low friction when moving components

6 products

Measuring and Inspecting

Thread Size Identifiers

Confirm your fastener's thread size, pitch, or threads per inch

20 products

Pipe Size Chart/Rulers

Curl around pipe to gauge its size, measure its diameter, or mark lines

3 products

Drill Bit Size Gauges

Match your drill bit to one of the holes to confirm its size

1 product

Squareness Gauges

Check frames and machined parts to see if they are leaning or uneven

3 products

Height Gauges

Measure an object's height and mark workpieces for machining

26 products

Gear Tooth Gauges

Identify your gear's pressure angle, pitch, and module

2 products

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

31 products

Coordinate Measuring Machine Plates and Fixtures

Raise workpieces and position them on a fixture plate

51 products

Coordinate Measurement Machine Probes

Take 3D measurements of workpieces on your CMM or CNC machine to inspect for quality

23 products

Parallel Rules

Draw parallel lines, as well as circles, arcs, and angles

1 product

Alignment Pins

Line up holes in sheet metal, I-beams, and angle irons for bolting, riveting, and welding

15 products

Material Handling

Loop Clamps

Hold pipe snug against the mounting surface to prevent movement that may cause breakage

478 products

Routing Clamps

Secure routed lines of pipe, tubing, and conduit

1,091 products

Pipe Supports

Brace pipe, tube, and conduit that needs to be routed between studs or elevated off the floor

61 products

Pipe Hangers

Suspend pipe, conduit, and tube from threaded rods, hooks, and straps

486 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

685 products

Riser Clamps

Wide flanges support vertical pipe passing through floors

38 products

Pipe Routing Saddles

Clip to strut channel to cradle insulated tubing and pipe

6 products

Conveyor Guide Mounting Rods

Secure guides and other attachments to conveyors

57 products

Conveyor Guide Clamps

Connect conveyor guides to each other and secure them in place

1 product

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

42 products

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

101 products

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

126 products

Fabricating and Machining

Drill Bushings

Fit in holes to guide drill bits and other cutting tools for precise and repeatable holes and cuts

1,051 products

Locating Pins

Install in fixturing plates or tables to position and secure workpieces

34 products

Fixturing Clamps

Secure your workpiece to a fixture table so it won't move during machining

19 products

Locating and Support Buttons

Secure and position workpieces and fixtures from the bottom or side

15 products

Spring Locating Pins

Apply side force to workpieces to clamp them in place

31 products

Electrical Discharge Machining Electrode Guides

Hold EDM electrodes in place as they penetrate workpieces

2 products

Ejector Pins

Push finished parts out of molds

136 products

Drill Bit Guides

Drill precise holes without building a fixture

2 products

Core Pins

Add to molds and pour in plastic to form holes in finished parts

112 products

Filament Guides for 3D Printer Extruder Heating Elements

Hold and direct filament toward the nozzle as it melts in the heating block

3 products

Communication

Reference Charts

Check decimal equivalents, drill sizes, or specifications for socket screws

5 products

Stencils

Paint over or trace to create everything from custom messages to drafting designs

4 products

Fastening and Joining

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

254 products

Dowel Pins

Align parts before assembly or use as a pivot, shaft, or hinge to join moving components

1,154 products

Taper Pins

Fit snugly into tapered holes to secure, position, and align components

232 products

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

282 products

Spring Plunger Drivers

Install spring plungers from the nose end without depressing the nose

7 products

Electrical

Cable and Hose Carriers

Route, protect, and guide moving cable

33 products

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

65 products

Building and Machinery Hardware

Grommets

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

50 products

Door Tracks

Hang panels to slide over openings when there’s not space for a swinging door

1 product