M22 Wheel Nuts, Conical and Ball Seat dimensions to Trade series (wheel nut): width across flats (spanner size) 32 mm, nut height 32 mm, coarse thread pitch 2.5 mm. Tighten to approximately 573 Nm at property class 8.8 in a dry, as-supplied condition.
- Width across flats (spanner size)
- 32 mm
- Nut height
- 32 mm
- Coarse thread pitch
- 2.5 mm
- Tightening torque (class 8.8)
- 573 Nm
Figures are nominal values from the governing standard. Confirm against the tolerance class for your application before machining or ordering.
M22 Wheel Nuts, Conical and Ball Seat are manufactured to Trade series (wheel nut). This page lists the controlling dimensions for the M22 size together with 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.
M22 Dimensional Row (Trade series (wheel nut))
| Thread size | Pitch (mm) | Seat type | Width across flats s (mm) | Total height m (mm) | Typical torque (Nm) | Material | Finish |
|---|
| M22 | 1.5 | Conical 60° | 32 | 32 | 600 | Class 10 steel | Zinc, commercial vehicle |
Spanner & Drive for M22 Wheel Nuts, Conical and Ball Seat
Drive geometry for M22 Wheel Nuts, Conical and Ball Seat is given by the row above; match the tool to the listed values.
Tightening Torque for M22
| Class 8.8 (dry, ~µ 0.125) | ≈ 629 Nm |
|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 895 Nm |
|---|
| Class 12.9 (dry, ~µ 0.125) | ≈ 1048 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 M22
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 M22 Wheel Nuts, Conical and Ball Seat
- At M22 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 M22
Pair M22 with the matching M22 bolt or screw, plus a M22 flat washer where required to distribute load on softer materials.
Custom manufacturing · Made to drawing
Need wheel nuts, conical and ball seat in a size this table does not list?
This page covers M22 wheel nuts, conical and ball seat. Thread, height, across-flats, property class, locking feature and flange form can all be varied, including thread sizes the standard series does not run to. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
Custom nut manufacturingSend a drawing
Applications & Industries for M22 Wheel Nuts
Where Wheel Nuts are used, and what decides the specification in each case. Stocked from M12 to M22.
Industries that specify Wheel Nuts
-
Commercial vehicles & trailers
Heavy wheel fixings torqued and re-checked.
-
Motorsport & modification
Aftermarket wheels with a different seat form.
-
Automotive service
Road wheel mounting on cars and light commercials.
-
Building services
Threaded rod, channel and suspension assemblies.
-
Machine building & OEM
The clamping counter-face on studs and bolts throughout an assembly.
-
Steel fabrication
Bolted structural and frame connections.
Typical applications
- seat form must match the wheel — conical, ball or flat
- fitted dry and torqued to the vehicle figure
- mounting a road wheel to a hub or stud
- locking an adjustment so it cannot drift
- joints re-torqued at a service interval
- completing a bolted joint on a stud, rod or bolt
Service conditions to specify against
- Marine and coastal
- Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- High load
- Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
- Match the class
- A nut below the bolt property class strips before the bolt reaches its own limit — pair class 8 nuts with 8.8 bolts, class 10 with 10.9.
Where to use something else
- Never lubricate a wheel nut thread or seat: the torque figure assumes a dry joint and lubrication over-tensions the stud.
Full application guide: where Wheel Nuts are used, how to specify them, and the cases they are wrong for
