The M42 size of Self-Locking Counter Nuts is dimensioned by DIN 7967. The table below gives the dimensional row from the standard, followed by the drive and the installation notes for this type.
Values are taken from the governing standard rather than from a general machine-thread table, because this type is not selected on one.
M42 Dimensional Row (DIN 7967)
| Size | od (mm) | id (mm) | Nut height m (mm) | Width across flats s (mm) | t (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M42 | 42 | 37.6 | 11 | 65 | 1.4 | DIN 7967 |
Spanner & Drive for M42 Self-Locking Counter Nuts
Drive geometry for M42 Self-Locking Counter Nuts is given by the row above; match the tool to the listed values.
Tightening Torque for M42
| Class 8.8 (dry, ~µ 0.125) | ≈ Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ Nm |
Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.
Proof Load & Strength for M42
Nuts are graded to ISO 898-2 by the proof load the nut itself will hold (classes 04, 05, 5, 6, 8, 10 and 12), not by the 8.8 / 10.9 / 12.9 scale used for bolts. A class-8 nut is the correct mate for a class-8.8 bolt, and the joint is designed on the bolt, so no bolt-tension figure is quoted here.
Installation Tips for M42 Self-Locking Counter Nuts
- At M42 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 M42
Pair M42 with the matching M42 bolt or screw, plus a M42 flat washer where required to distribute load on softer materials.
Custom manufacturing · Made to drawing
Need self-locking counter nuts in a size this table does not list?
This page covers M42 self-locking counter nuts. Locking method is specifiable independently of the rest: nylon insert, all-metal deformed thread, serrated flange, or none. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
