Bolt lengths come in preferred sizes which generally are in regular production – these are indicated in the table below as X – while those denoted (X) refer to bolts which are available, but not considered to be in regular production. Availability of these bolts should be confirmed by the supplier.
Bolt diameters have been limited to between M 10 and M 24 – while the lengths are between 20 and 130 mm. Bolts outside of this range should be confirmed by the supplier.
Metric Bolts - Preferred Sizes (Lengths)
| Bolt Dia. | M 10 Gr.4.6 |
M 10 Gr.8.8 |
M 12 Gr.4.6 |
M 12 Gr.8.8 |
M 16 Gr.4.6 |
M 16 Gr.8.8 |
M 20 Gr.4.6 |
M 20 Gr.8.8 |
M 24 Gr.4.6 |
M 24 Gr.8.8 |
| 20 | X | (X) | ||||||||
| 25 | X | (X) | X | (X) | X | (X) | ||||
| 30 | X | (X) | X | (X) | X | (X) | ||||
| 35 | (X) | X | (X) | (X) | X | (X) | ||||
| 40 | X | X | X | X | X | (X) | X | (X) | (X) | |
| 45 | X | X | X | X | X | (X) | X | (X) | (X) | |
| 50 | X | X | X | X | X | X | X | X | X | |
| 55 | X | X | X | X | X | X | X | X | X | X |
| 60 | (X) | X | (X) | X | (X) | X | (X) | X | X | X |
| 65 | X | X | X | X | X | X | X | X | (X) | X |
| 70 | (X) | X | (X) | X | X | X | (X) | X | X | X |
| 75 | X | X | X | X | X | X | X | X | (X) | X |
| 80 | (X) | X | (X) | X | (X) | X | (X) | X | X | X |
| 85 | (X) | X | (X) | X | (X) | (X) | (X) | (X) | (X) | (X) |
| 90 | X | X | X | X | X | X | X | X | (X) | X |
| 95 | (X) | X | (X) | X | (X) | X | (X) | X | X | X |
| 100 | X | X | X | X | X | X | X | X | (X) | X |
| 110 | (X) | X | (X) | X | (X) | X | (X) | X | X | X |
| 115 | X | X | X | X | X | X | X | X | (X) | X |
| 120 | (X) | X | (X) | X | (X) | X | (X) | X | X | X |
| 125 | X | X | X | X | (X) | |||||
| 130 | (X) | (X) | (X) | (X) | (X) | (X) | (X) | (X) | X | (X) |
Metric Bolts - Thread Lengths
| Length Range | M 10 | M 12 | M 16 | M 20 | M 24 |
| 30 – 125 125 – 200 > 200 |
26 32 – |
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| 35 – 125 125 -200 > 200 |
30 36 49 |
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| 40 – 125 125 -200 > 200 |
38 44 57 |
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| 50 – 125 125 -200 > 200 |
46 52 65 |
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| 60 – 125 125 -200 > 200 |
54 60 73 |
Inch Bolts - Thread Lengths
| Length Range | Dia. 3/8” | Dia. ½” | Dia. 5/8” | Dia. ¾” | Dia. 7/8” | Dia. 1” |
| ≤ 6” | 1” | 1.25” | 1.5” | 1.75” | 2” | 2.25” |
| > 6” | 1.25” | 1.5” | 1.75” | 2” | 2.25” | 2.5” |
Inch Bolts - Thread Lengths for A325 and A490 Structural Bolts
| Length Range | Dia. 3/8” | Dia. ½” | Dia. 5/8” | Dia. ¾” | Dia. 7/8” | Dia. 1” |
| All | – | – | 1.25” | 1.375” | 1.5” | 1.75” |
Runout Values for Metric and Inch Series Bolts
The thread runout of a bolt is where the threaded section transitions into the bolt shank. This area exists beyond where the usable thread stops.
| Metric Bolt Dia | Metric Run-Out | Inch Bolt Dia | Inch Run-Out |
| M 6 | 2.5 | ||
| M 8 | 3 | ||
| M 10 | 3.5 | ||
| M 12 | 4 | ½” | 0.19” |
| M 16 | 5 | 5/8” | 0.22” |
| M 20 | 6 | ¾” | 0.25” |
| M 22 | – | 7/8” | 0.28” |
| M 24 | 7 | 1” | 0.31” |
| M 30 | 8 | ||
| M 36 | 10 |