Center Gauges | McMaster-Carr

	System of Measurement System of Measurement

	For Threads per Inch For Threads per Inch

	For Thread Type For Thread Type

UNC

UNF

	Manufacturer Manufacturer

	Manufacturer Model Number Manufacturer Model Number

	Diameter Diameter

	Length Length

	Material Material

	Finish Finish

Satin Chrome

Chrome Plated

Anodized

	For Use With For Use With

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Blade Length Blade Length

	Width Width

3/4"

8 11/16"

10 1/2"

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Punch Material Punch Material

Steel

Aluminum

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Graduation Marks Graduation Marks

	Square Head Material Square Head Material

Iron

Steel

Aluminum

	Body Diameter Body Diameter

3/8"

1/2"

10mm

	Component Component

Blade

Square Head with Built-in
Level

Center Head

Square Head

	Tip Diameter Tip Diameter

	Protractor Head Material Protractor Head Material

Iron

Aluminum

	Wire Gauge Wire Gauge

60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

Forward

How can we improve?

289 Products

Size Identifying

Threads per Inch and Center Identifiers

Identify threads per inch on external threads and find the center of your workpiece to line up thread cutting tools.

All-in-One Identifiers

Find tube, pipe, fastener, wire, and drill bit sizes with one tool.

Precision Dimensional Measuring

Center-to-Center Gauges for Calipers

Install these gauges onto the jaws of electronic, dial, and vernier calipers to measure the center-to-center distance between two holes.

Calipers for Center-to-Center Distances

Measure center-to-center distances with the pointed jaws on these calipers, which are designed to self-center in holes.

Machine Tool Indicators

Find the edge of a workpiece, align your setup, and inspect parts with one tool. Once installed in your milling machine spindle, these indicators can measure in three axes.

Tips for Machine Tool Indicators

Replace the tip of your machine tool indicator.

Combination Squares

Replace your try square, miter square, depth gauge, marking gauge, 90° level, ruler, and scriber with one tool.

Scratch-Resistant High-Accuracy Combination Squares

A titanium coating protects the blade against scratches and wear.

Starrett High-Accuracy Combination Squares

Replace your try square, miter square, depth gauge, height gauge, center-point finder, and level. The blade on these squares meets Fed. Spec. GGG-R-791H, which establishes uniform standards for accuracy, graduations, and size.