Hole Centers | McMaster-Carr

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Locating Pin Head Type

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1,183 Products

Measuring and Inspecting

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

320 products

Center Finders

Line up your drill with the center of round bars and pipe

1 product

Edge Finders

Locate edges, shoulders, center points, and lines on workpieces in milling machines

10 products

Center Punches

Mark center holes in metal and other material

85 products

Layout Marking Supplies

Before laying them out, draw lines and punch holes in workpieces

1 product

Center Punch/Angle Indicators

Find the center of pipe and other parts and determine setup angles on milling machines and grinders

5 products

Layout Compasses

Draw circles and transfer distance measurements

1 product

Thread Size Identifiers

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

1 product

Threaded Hole Location Gauges

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

70 products

Calipers

Take inside, outside, and depth measurements with more precision than a ruler

9 products

Caliper Tips

Install on your caliper to measure hard-to-reach areas or center-to-center distances

2 products

Machine Tool Indicators

Find the exact edge of a workpiece without math or guesswork to quickly align your machining setup

6 products

Protractors

Set bevels and measure angles with everything from pocket-size to long-arm protractors

1 product

Machine Tool Indicator Contact Points

Replace the contact point on your machine tool indicator

3 products

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

27 products

Tape Measures

Standard, long, center-finding, and flexible tape measures

2 products

Combination Square Center Heads

Attach combination square blades to form a combination square

15 products

Alignment Pins

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

148 products

Pipe Flange Aligners

Line up flange holes so they bolt securely and connections won’t leak

21 products

Fabricating and Machining

Drill Bit Guides

Drill precise holes without building a fixture

3 products

Drill Bits

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

100 products

Locating Pins

Install in fixturing plates or tables to position and secure workpieces

204 products

Index Plungers

Align parts that have mating bushings for more precision than standard spring plungers

6 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

2 products

Alignment Locks

Precisely align your mold halves

10 products

Lathe Centers

Use in a lathe's headstock or tailstock to support the end of a workpiece

137 products