| Internal thread diameter* d | Pitch of thread P | External diameter, shank diameter D | Nominal length m (ref.) | Minimum tensile strength** kN |
|---|---|---|---|---|
| M16 | 2 | M24 | 100 | 130 |
| M20 | 2.5 | M30 | 100 | 203 |
| M22 | 2.5 | M33 | 100 | 252 |
| M24 | 3 | M36 | 100 | 293 |
| M27 | 3 | M39 | 100 | 381 |
| M30 | 3.5 | M42 | 100, 120 | 466 |
| M33 | 3.5 | M45 | 100, 120 | 576 |
| M36 | 4 | M48 | 100, 120 or 150 | 678 |
Dimensions in millimetres
*) Internal thread to suite self-colour bolts (6H), studs or square-square bolts (sqsq bolts). For thick finish (like hot-dip galvanising) internal thread is tapped oversize to suit (6AZ).
**) Minimum tensile strength based on a minimum of six full threads screwed into an internal thread on both sides of the bolt extender
Head dimensions depends from which blank standard the extender is manufactured.
It can be either ISO 4017 or DIN 933
.
Bolt extenders are manufacturer from Grade 8.8 Carbon Steel bolt blanks.
Other grades and type of steel may be considered.
We can made bolt extenders to your needs. Below is a general specification for a typical extenders that we made and may hold on the shelf. If you need an extender to make to the specific requirements contact our sales team and together with our engineers we can make it happen.
