M56 Metric Thread
M56 Metric Thread Dimensions and Pitch
Below are the key dimensions for M56 metric threads: pitch, tap drill and clearance drill according to ISO 724:2023.
M56 Coarse (standard)
Welcome to our M56 Metric Thread Page, your go-to hub for swift metrics on M56 metric threads. We've curated a broad database for all standard metric threads you'll need for your parts, emphasising critical measurements like thread pitch, tap drill, and clearance drill. It's a complete solution for engineers, machinists, and hobbyists in need of reliable, precise data.
M56 Coarse Pitch Dimensions
Nominal Size
d=D
p
r
d2=D2
d3
D1
h3
H1
Tap Drill
M56
56
5.5
0.794
52.428
49.252
50.046
3.374
2.977
50.5
All dimensions stated in are mm (millimetre)
M56 Fine Pitch Dimensions
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 M56 thread?
The pitch for an M56 thread is 5.5 mm.
What is the tap drill for an M56 thread?
The tap drill for an M56 thread is 50.5 mm.
What size is a clearance hole for an M56 thread?
The clearance drill for an M56 thread is 62 mm.
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