Standard T Slot Dimensions Metric
Standard T Slot Dimensions Metric Rating: 5,1/10 894 reviews
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Throat dimensions are basic. When slots are intended to be used for holding only, tolerances can be 0.0 + 0.010 inch or H12 Metric (ISO/R286); when intended for location, tolerance can be 0.0 + 0.001 inch or H8 Metric. Corners of T-Slots may be square or may be rounded or broken to the indicated maximum dimensions at the manufacturer's option. Standards for T-slots. T-slots come in standard sizes. Needless to say things designed to fit in the T-slots are designed to fit these standard sizes. Similarly, the cutters designed for cutting T-slot are designed to cut standard size T-slots. Fig outline of a T-slot. The key characteristic of a T-slot is its width. Of course this can be.
Standards for T-slots
T-slots come in standard sizes. Needless to say things designed to fit in the T-slots are designed to fit these standard sizes. Similarly, the cutters designed for cutting T-slot are designed to cut standard size T-slots.
fig outline of a T-slot
The key characteristic of a T-slot is its width. Of course this can be metric or imperial
Metric T-slots (all in millimeters)
A b B+ C C+ Hmin Hmax
6 11 +1.5 5 +1 13 11
8 14.5 +1.5 7 +1 18 15
Metric T Slot Nut
10 16 +2 7 +1 21 17
12 19 +2 8 +1 25 20
Imperial T-slots (All in inches)
diam of bolt width of slot depth of throatmax
A
1/4 9/32 3/8 1/8 9/16 1/2 15/64 13/64
5/16 11/32 7/16 5/32 21/32 19/32
3/8 7/16
1/2 9/16
5/8 11/16
Dimensions of metric threads according ISO 724
ISO 724 specifies basic dimensions of metric threads in accordance with ISO 261. Dimensions refer to the basic profile in accordance with ISO 68.
There are three kinds of ISO metric threads:
- coarse
- fine
- extra fine
The thread angle is 60o. The thread depth is 0.614 x pitch.
Metric Threads - Coarse Thread Pitches
| Size - Nominal Diameter (mm) | Pitch1) (mm) | Clearance Drill (mm) | Tap Drill (mm) | Tensile Stress Area (mm2) |
|---|---|---|---|---|
| M 1.6 | 0.35 | 1.8 | 1.25 | |
| M 2 | 0.40 | 2.4 | 1.60 | |
| M 2.5 | 0.45 | 2.90 | 2.00 | |
| M 3 | 0.50 | 3.40 | 2.50 | |
| M 3.5 | 0.60 | 3.90 | 2.90 | |
| M 4 | 0.70 | 4.50 | 3.30 | 8.78 |
| M 5 | 0.80 | 5.50 | 4.20 | 14.2 |
| M 6 | 1.00 | 6.60 | 5.00 | 20.1 |
| M 8 | 1.25 | 9.00 | 6.80 | 36.6 |
| M 10 | 1.50 | 12.00 | 8.50 | 58.0 |
| M 12 | 1.75 | 14.00 | 10.20 | 84.3 |
| M 14 | 2.00 | 16.00 | 12.00 | |
| M 16 | 2.00 | 18.00 | 14.00 | 157 |
| M 20 | 2.50 | 22.00 | 17.50 | 245 |
| M 22 | 2.50 | 25.00 | 19.50 | |
| M 24 | 3.00 | 27.00 | 21.00 | 353 |
| M 27 | 3.00 | 30.00 | 24.00 | |
| M 30 | 3.50 | 33.00 | 26.50 | 561 |
| M 36 | 4.00 | 40.00 | 32.00 | 817 |
| M 42 | 4.50 | 46.00 | 37.50 | 1120 |
| M 48 | 5.00 | 53.00 | 43.00 | 1470 |
| M 56 | 5.50 | 62.00 | 50.50 | 2030 |
| M 64 | 6.00 | 70.00 | 58.00 | 2680 |
| M 68 | 6.00 | 74.00 | 62.00 |
1) For metric threads pitch is the distance between threads.
- 1 mm = 0.039 inches
Standard T Slot Dimensions Metric Chart
Metric Threads - Fine Thread Pitches
It is common to designate metric fine threads with the capital M plus an indication to their nominal outer diameter and their pitch:
M size x pitch
Example:
M 10 x 1.5
| Size - Nominal Diameter (mm) | Pitch1) (mm) | Tap Drill (mm) | Tebsile Stress Area (mm2) |
|---|---|---|---|
| M 1.0 x 0.2 | 0.20 | 0.80 | |
| M 1.1 x 0.2 | 0.20 | 0.90 | |
| M 1.2 x 0.2 | 0.20 | 1.00 | |
| M 1.4 x 0.2 | 0.20 | 1.20 | |
| M 1.6 x 0.2 | 0.20 | 1.40 | |
| M 1.8 x 0.2 | 0.20 | 1.60 | |
| M 2 x 0.25 | 0.25 | 1.75 | |
| M 2.2 x 0.25 | 0.25 | 1.95 | |
| M 2.5 x 0.35 | 0.35 | 2.10 | |
| M 3 x 0.35 | 0.35 | 2.60 | |
| M 3.5 x 0.35 | 0.35 | 3.10 | |
| M 4 x 0.5 | 0.50 | 3.50 | |
| M 4.5 x 0.5 | 0.50 | 4.00 | |
| M 5 x 0.5 | 0.50 | 4.50 | |
| M 5.5 x 0.5 | 0.50 | 5.00 | |
| M 6 x 0.75 | 0.75 | 5.20 | 20.1 |
| M 7 x 0.75 | 0.75 | 6.20 | |
| M 8 x 0.75 | 0.75 | 7.20 | |
| M 8 x 1.0 | 1.00 | 7.00 | 39.2 |
| M 9 x 0.75 | 0.75 | 8.20 | |
| M 9 x 1 | 1.00 | 8.00 | |
| M 10 x 0.75 | 0.75 | 9.20 | |
| M 10 x 1 | 1.00 | 9.00 | 64.5 |
| M 10 x 1.25 | 1.25 | 8.80 | 61.2 |
| M 11 x 0.75 | 0.75 | 10.20 | |
| M 11 x 1 | 1.00 | 10.00 | |
| M 12 x 1 | 1.00 | 11.00 | |
| M 12 x 1.25 | 1.25 | 10.80 | 92.1 |
| M 12 x 1.5 | 1.50 | 10.50 | 88.1 |
| M 14 x 1.0 | 1.00 | 13.00 | |
| M 14 x 1.25 | 1.25 | 12.80 | |
| M 14 x 1.5 | 1.50 | 12.50 | |
| M 15 x 1 | 1.00 | 14.00 | |
| M 15 x 1.5 | 1.50 | 13.50 | |
| M 16 x 1 | 1.00 | 15.00 | 178 |
| M 16 x 1.5 | 1.50 | 14.50 | 167 |
| M 17 x 1.0 | 1.00 | 16.00 | |
| M 17 x 1.5 | 1.50 | 15.50 | |
| M 18 x 1.0 | 1.00 | 17.00 | |
| M 18 x 1.5 | 1.50 | 16.50 | |
| M 18 x 2.0 | 2.00 | 16.00 | |
| M 20 x 1.0 | 1.00 | 19.00 | |
| M 20 x 1.5 | 1.50 | 18.50 | 272 |
| M 20 x 2.0 | 2.00 | 18.00 | 258 |
| M 22 x 1.0 | 1.00 | 21.00 | |
| M 22 x 1.5 | 1.50 | 20.50 | |
| M 22 x 2.0 | 2.00 | 20.00 | |
| M 24 x 1.0 | 1.00 | 23.00 | |
| M 24 x 1.5 | 1.50 | 22.50 | 401 |
| M 24 x 2.0 | 2.00 | 22.00 | 384 |
| M 25 x 1.0 | 1.00 | 24.00 | |
| M 25 x 1.5 | 1.50 | 23.50 | |
| M 25 x 2.0 | 2.00 | 23.00 | |
| M 27 x 1.0 | 1.00 | 26.00 | |
| M 27 x 1.5 | 1.50 | 25.50 | |
| M 27 x 2.0 | 2.00 | 25.00 | |
| M 28 x 1.0 | 1.00 | 27.00 | |
| M 28 x 1.5 | 1.50 | 26.50 | |
| M 28 x 2.0 | 2.00 | 26.00 | |
| M 30 x 1.0 | 1.00 | 29.00 | |
| M 30 x 1.5 | 1.50 | 28.50 | |
| M 30 x 2.0 | 2.00 | 28.00 | 621 |
| M 30 x 3.0 | 3.00 | 27.00 | 581 |
| M 32 x 1.5 | 1.50 | 30.50 | |
| M 32 x 2.0 | 2.00 | 30.00 | |
| M 33 x 1.5 | 1.50 | 31.50 | |
| M 33 x 2.0 | 2.00 | 31.00 | |
| M 33 x 3.0 | 3.00 | 30.00 | |
| M 35 x 1.5 | 1.50 | 33.50 | |
| M 35 x 2.0 | 2.00 | 33.00 | |
| M 36 x 1.5 | 1.50 | 34.50 | |
| M 36 x 2.0 | 2.00 | 34.00 | 915 |
| M 36 x 3.0 | 3.00 | 33.00 | 865 |
| M 39 x 1.5 | 1.50 | 37.50 | |
| M 39 x 2.0 | 2.00 | 37.00 | |
| M 39 x 3.0 | 3.00 | 36.00 | |
| M 40 x 1.5 | 1.50 | 38.50 | |
| M 40 x 2.0 | 2.00 | 38.00 | |
| M 40 x 3.0 | 3.00 | 37.00 | |
| M 42 x 1.5 | 1.50 | 40.50 | |
| M 42 x 2.0 | 2.00 | 40.00 | |
| M 42 x 3.0 | 3.00 | 39.00 | 1210 |
| M 42 x 4.0 | 4.00 | 38.00 | 1150 |
| M 45 x 1.5 | 1.50 | 43.50 | |
| M 45 x 2.0 | 2.00 | 43.00 | |
| M 45 x 3.0 | 3.00 | 42.00 | |
| M 45 x 4.0 | 4.00 | 41.00 | |
| M 48 x 1.5 | 1.50 | 46.50 | |
| M 48 x 2.0 | 2.00 | 46.00 | |
| M 48 x 3.0 | 3.00 | 45.00 | 1600 |
| M 48 x 4.0 | 4.00 | 44.00 | 1540 |
| M 50 x 1.5 | 1.50 | 48.50 | |
| M 50 x 2.0 | 2.00 | 48.00 | |
| M 50 x 3.0 | 3.00 | 47.00 | |
| M 52 x 1.5 | 1.50 | 50.50 | |
| M 52 x 2.0 | 2.00 | 50.00 | |
| M 52 x 3.0 | 3.00 | 49.00 | |
| M 52 x 4.0 | 4.00 | 48.00 | |
| M 55 x 1.5 | 1.50 | 53.50 | |
| M 55 x 2.0 | 2.00 | 53.00 | |
| M 55 x 3.0 | 3.00 | 52.00 | |
| M 55 x 4.0 | 4.00 | 51.00 | |
| M 56 x 1.5 | 1.50 | 54.50 | |
| M 56 x 2.0 | 2.00 | 54.00 | |
| M 56 x 3.0 | 3.00 | 53.00 | |
| M 56 x 4.0 | 4.00 | 52.00 | |
| M 58 x 1.5 | 1.50 | 56.50 | |
| M 58 x 2.0 | 2.00 | 56.00 | |
| M 58 x 3.0 | 3.00 | 55.00 | |
| M 58 x 4.0 | 4.00 | 54.00 | |
| M 60 x 1.5 | 1.50 | 58.50 | |
| M 60 x 2.0 | 2.00 | 58.00 | |
| M 60 x 3.0 | 3.00 | 57.00 | |
| M 60 x 4.0 | 4.00 | 56.00 | |
| M 62 x 1.5 | 1.50 | 60.50 | |
| M 62 x 2.0 | 2.00 | 60.00 | |
| M 62 x 3.0 | 3.00 | 59.00 | |
| M 62 x 4.0 | 4.00 | 58.00 | |
| M 64 x 1.5 | 1.50 | 62.50 | |
| M 64 x 2.0 | 2.00 | 62.00 | |
| M 64 x 3.0 | 3.00 | 61.00 | |
| M 64 x 4.0 | 4.00 | 60.00 | |
| M 65 x 1.5 | 1.50 | 63.50 | |
| M 65 x 2.0 | 2.00 | 63.00 | |
| M 65 x 3.0 | 3.00 | 62.00 | |
| M 65 x 4.0 | 4.00 | 61.00 | |
| M 68 x 1.5 | 1.50 | 66.50 | |
| M 68 x 2.0 | 2.00 | 66.00 | |
| M 68 x 3.0 | 3.00 | 65.00 | |
| M 68 x 4.0 | 4.00 | 64.00 | |
| M 70 x 1.5 | 1.50 | 68.50 | |
| M 70 x 2.0 | 2.00 | 68.00 | |
| M 70 x 3.0 | 3.00 | 67.00 | |
| M 70 x 4.0 | 4.00 | 66.00 | |
| M 70 x 6.0 | 6.00 | 64.00 | |
| M 72 x 1.5 | 1.50 | 70.50 | |
| M 72 x 2.0 | 2.00 | 70.00 | |
| M 72 x 3.0 | 3.00 | 69.00 | |
| M 72 x 4.0 | 4.00 | 68.00 | |
| M 72 x 6.0 | 6.00 | 66.00 | |
| M 75 x 1.5 | 1.50 | 73.50 | |
| M 75 x 2.0 | 2.00 | 73.00 | |
| M 75 x 3.0 | 3.00 | 72.00 | |
| M 75 x 4.0 | 4.00 | 71.00 | |
| M 75 x 6.0 | 6.00 | 69.00 | |
| M 76 x 1.5 | 1.50 | 74.50 | |
| M 76 x 2.0 | 2.00 | 74.00 | |
| M 76 x 3.0 | 3.00 | 73.00 | |
| M 76 x 4.0 | 4.00 | 72.00 | |
| M 76 x 6.0 | 6.00 | 70.00 | |
| M 80 x 1.5 | 1.50 | 78.50 | |
| M 80 x 2.0 | 2.00 | 78.00 | |
| M 80 x 3.0 | 3.00 | 77.00 | |
| M 80 x 4.0 | 4.00 | 76.00 | |
| M 80 x 6.0 | 6.00 | 74.00 | |
| M 85 x 2.0 | 2.00 | 83.00 | |
| M 85 x 3.0 | 3.00 | 82.00 | |
| M 85 x 4.0 | 4.00 | 81.00 | |
| M 85 x 6.0 | 6.00 | 79.00 | |
| M 90 x 2.0 | 2.00 | 88.00 | |
| M 90 x 3.0 | 3.00 | 87.00 | |
| M 90 x 4.0 | 4.00 | 86.00 | |
| M 90 x 6.0 | 6.00 | 84.00 | |
| M 95 x 2.0 | 2.00 | 93.00 | |
| M 95 x 3.0 | 3.00 | 92.00 | |
| M 95 x 4.0 | 4.00 | 91.00 | |
| M 95 x 6.0 | 6.00 | 89.00 | |
| M 100 x 2.0 | 2.00 | 98.00 | |
| M 100 x 3.0 | 3.00 | 97.00 | |
| M 100 x 4.0 | 4.00 | 96.00 | |
| M 100 x 6.0 | 6.00 | 94.00 |
Related ISO Standards
- ISO 68:1973 ISO general purpose screw threads - Basic profile
- ISO 261:1973 ISO general purpose metric screw threads - General plan
- ISO 262:1973 ISO general purpose metric screw threads - Selected sizes for screws, bolts and nuts
- ISO 724:1993 ISO general-purpose metric screw threads - Basic dimensions
- ISO 965-1:1980 ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data
- ISO 965-2:1980 ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose bolt and nut threads - Medium quality
- ISO 965-3:1980 ISO general purpose metric screw threads - Tolerances - Part 3: Deviations for constructional threads
- ISO 1502:1996 ISO general-purpose metric screw threads - Gauges and gauging
Threads produced to this standard are interchangeable with threads produced to the metric standard ANSI/ASME B1.13M Metric Screw Threads: M Profile.
Related Topics
- Miscellaneous - Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more
- Threads - Thread data - metric, unified, ACME and others
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