Size Identifiers | McMaster-Carr

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Material

System of Measurement

Plug Gauge Size

Gauge Measurement Type

No-Go

Size-Checking Gauge Class

Certificate Type

Accuracy Certificate Traceable to NIST

Calibration Certificate

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Exempt

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

Hardness

Surface Smoothness, RMS

Specifications Met

Thread Size

Thread Type

Thickness

Finish

Titanium Nitride (TiN) Coated

Performance

Thread Fit

Unified Standard Class 2B

Unified Standard Class 3B

Increment

Container Type

Thread Direction

For Use With

Pitch

1,798 Products

Measuring and Inspecting

Thread Size Identifiers

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

43 products

Diameter Identifiers

Tighten the strap around rods, drill bits, and other small items to measure outer diameter

1 product

Drill Bit Size Gauges

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

5 products

Metal Gauges

Press sheet metal or wire into the slots to determine their thickness or gauge size

3 products

Pipe Size Measuring Kits

Connect to pipe and fittings to determine their size without additional measuring tools

4 products

Hose Coupling Size-Identification Kits

Match your hose coupling to one of the plugs to determine its size without measuring

1 product

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

381 products

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

119 products

Pipe Size Chart/Rulers

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

3 products

Sheave Gauges

Match your pulley or V-belt to one of the leaves to determine its size or wear

2 products

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

1,116 products

Tape Measures

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

55 products

Bore Gauge Heads

Swap the head on your Mitutoyo electronic bore gauge for one with a different measuring range

19 products

V-Belt Size Gauges

Insert your V-belt and pull the slide tight to determine its trade size

1 product

Inside/Outside Diameter Gauges

Mount your variance indicator to measure the diameter of rims, grooves, and shallow holes

2 products

O-Ring Gauges

Identify the size of your O-ring

4 products

Chamfer Gauges

Check the diameter of chamfered edges to make sure they're within tolerance

21 products

Countersink Gauges

Catch sizing errors in countersunk holes to keep fasteners from protruding and creating weak points

18 products