M18 All-Metal Lock Nuts (ISO 7042 / DIN 980) are specified by thread size, length and head dimensions. The M18 row from the standard is reproduced below, followed by the drill sizes, spanner size and torque values used when installing this size.
M18 Dimensional Row (ISO 7042 / DIN 980)
| Size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Reference standard | Notes |
|---|---|---|---|---|---|
| M18 | 2.5 | 27.0 | 19.0 | ISO 7042 / DIN 980 | Deformed-top locking, high-temperature capable |
Spanner & Drive for M18 All-Metal Lock Nuts
Drive geometry for M18 All-Metal Lock Nuts is given by the row above; match the tool to the listed values.
Common Applications for M18 All-Metal Lock Nuts
M18 All-Metal Lock Nuts are commonly specified for structural joints, flange connections and heavy equipment foundations.
Installation Tips for M18 All-Metal Lock Nuts
- At M18 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.
Mating Parts for M18
Pair M18 with the matching M18 bolt or screw, plus a M18 flat washer where required to distribute load on softer materials.