M33 Metric Thread Dimensions and Pitch

Below are the key dimensions for M33 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.

M33 Coarse (standard)

M33 Pitch:  3.5mm
M33 Tap Drill:  29.5mm
M33 Clearance Drill:  36mm
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M33 Metric Thread

M33 ISO metric thread profile illustration

Immerse yourself in our M33 Metric Thread Page, your go-to tool for swift measurements on M33 metric threads. We've curated an extensive database for all the common metric threads you'll use in your components, focusing on essential metrics like thread pitch, tap drill, and clearance drill. It's a one-stop-shop for professionals and hobbyists looking for accurate and reliable information.

M33 Coarse Pitch Dimensions

Nominal Size
d=D
p
r
d2=D2
d3
D1
h3
H1
Tap Drill
M33
33
3.5
0.505
30.727
28.706
29.211
2.147
1.894
29.5
All dimensions stated in are mm (millimetre)

M33 Fine Pitch Dimensions

| Nominal Size | d=D | p | r | d2=D2 | d3 | D1 | h3 | H1 | Tap Drill | |--------------|-----|-----|-------|--------|--------|--------|-------|-------|-----------| | M33x1.5 | 33 | 1.5 | 0.217 | 32.026 | 31.16 | 31.376 | 0.92 | 0.812 | 31.5 | | M33x2.0 | 33 | 2 | 0.289 | 31.701 | 30.546 | 30.835 | 1.227 | 1.083 | 31 | | M33x3.0 | 33 | 3 | 0.433 | 31.051 | 29.319 | 29.752 | 1.84 | 1.624 | 30 |

All dimensions stated in are mm (millimetre)

ISO Metric Thread profile

d=D: Major Diameter
p: Pitch
r: Root Radius
d2=D2: Pitch Diameter
d3: Minor Diameter Male Thread
D1: Minor Diameter Female Thread
h3: Thread Height Male
H1: Thread Height Female

Major Diameter

The Major Diameter is the largest diameter on the thread and is measured from the thread crest to crest (peak of the thread).

Pitch

This is the distance (mm) from one thread to the next, this can be measured from tip to tip or groove to groove. Pitch can also be defined as TPI, which stands for threads per inch.

Minor Diameter

Minor Diameter is the smallest diameter on the thread and is measured from the thread root to root (Bottom of the thread).

Thread Angle

The angle between the thread faces. 60 degrees in the example above.

Right-Hand Thread

The thread will assemble when rotated clockwise. "righty tighty lefty loosely"

Left-Hand Thread

The thread will assemble when rotated counter-clockwise.

Frequently Asked Questions

What is the pitch of an M33 thread?

The pitch for an M33 thread is 3.5 mm.

What is the tap drill for an M33 thread?

The tap drill for an M33 thread is 29.5 mm.

What size is a clearance hole for an M33 thread?

The clearance drill for an M33 thread is 36 mm.

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