Machinists' Blocks | McMaster-Carr

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Specifications Met

Squareness Tolerance

1,160 Products

Fabricating and Machining

Setup Blocks

Use as mounting bases and supports to ensure accurate angles and spacing

31 products

Fixture Squares

Build different fixtures on multiple sides of the same block

38 products

Angle Plates

Ensure accurate right angles and hold workpieces and fixtures perpendicular to your machine table

64 products

Pin Removal Blocks

Remove a range of pin sizes from workpieces by tapping them into holes with a punch and hammer

1 product

V-Blocks

Hold round workpieces

72 products

Support Blocks

Support setup clamps for quick height adjustments

16 products

Fixture Keys

Locate fixtures and vises on your machine table

39 products

Parallels

Raise workpieces above your vise to create clearance for cutting tools

92 products

Sine Plates

Use with gauge blocks to measure angles on your workpiece or set up a part for precision grinding

4 products

Sine Bars

Measure, mark, and inspect exact angles on dies and other precision parts

2 products

Measuring and Inspecting

Gauge Blocks

Confirm dies, fixtures, and other workpieces meet precise tolerances and calibrate measuring tools

738 products

Surface Plates

Extremely flat to give an accurate reference plane for layout and inspection work

51 products

Calibration Squares

Lay horizontally or vertically on CNC machines to check the position of tools with high precision

2 products

Inspection Parallels

Line up workpieces for precise machining, or support them at a level height for inspecting

8 products

Inspection Setup Blocks

Line up workpieces at precise heights and angles for machining, measuring, and inspecting

2 products