M30 Nyloc Lock Nuts dimensions to DIN 985 / ISO 7040: width across flats (spanner size) 46 mm, nut height 25 mm, coarse thread pitch 3.5 mm. Tighten to approximately 1443 Nm at property class 8.8 in a dry, as-supplied condition.
- Width across flats (spanner size)
- 46 mm
- Nut height
- 25 mm
- Coarse thread pitch
- 3.5 mm
- Tightening torque (class 8.8)
- 1443 Nm
Figures are nominal values from the governing standard. Confirm against the tolerance class for your application before machining or ordering.
Dimensional data for M30 Nyloc Lock Nuts to DIN 985 / ISO 7040, 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.
M30 Dimensional Row (DIN 985 / ISO 7040)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e min (mm) | Total height m (mm) | Metal height (mm) | Reference standard | Notes |
|---|
| M30 | 3.5 | 46.0 | 50.85 | 25.0 | 24.0 | DIN 985 / ISO 7040 | With nylon insert, single use |
Spanner & Drive for M30 Nyloc Lock Nuts
Drive geometry for M30 Nyloc Lock Nuts is given by the row above; match the tool to the listed values.
Tightening Torque for M30
| Class 8.8 (dry, ~µ 0.125) | ≈ 1443 Nm |
|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 2055 Nm |
|---|
| Class 12.9 (dry, ~µ 0.125) | ≈ 2405 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 M30
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 M30 Nyloc Lock Nuts
- At M30 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 M30
Pair M30 with the matching M30 bolt or screw, plus a M30 flat washer where required to distribute load on softer materials.
Custom manufacturing · Made to drawing
Need nyloc lock nuts in a size this table does not list?
This page covers M30 nyloc lock nuts. 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 M30 Nyloc Lock Nuts
Nyloc Lock Nuts are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M3 to M36.
Industries that specify Nyloc Lock Nuts
-
Steel fabrication
Bolted structural and frame connections.
-
Automotive & transport
Vibration-prone joints where the locking type is specified on the drawing.
-
Maintenance & MRO
Replacements matched to the existing bolt class, thread and finish.
-
Building services
Threaded rod, channel and suspension assemblies.
-
Machine building & OEM
The clamping counter-face on studs and bolts throughout an assembly.
Typical applications
- 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.
- Temperature ceiling
- The polymer feature sets the limit, not the steel: nylon softens above roughly 120 °C, so an all-metal locking type is the correct choice on hot assemblies.
- Vibration
- Specified where cyclic load would loosen a plain nut or screw — rotating plant, rail, mobile equipment and anything that is not re-torqued in service.
Full application guide: where Nyloc Lock Nuts are used, how to specify them, and the cases they are wrong for
