Dimensional data for M16 Serrated Flange Lock Nuts to DIN 6923, 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.
M16 Dimensional Row (DIN 6923)
| Thread size | Pitch (mm) | Across flats s (mm) | Flange diameter dc (mm) | Total height m (mm) | Flange thickness c (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M16 | 2.0 | 24 | 34.5 | 16.0 | 2.4 | DIN 6923 |
Spanner & Drive for M16 Serrated Flange Lock Nuts
Drive geometry for M16 Serrated Flange Lock Nuts is given by the row above; match the tool to the listed values.
Tightening Torque for M16
| Class 8.8 (dry, ~µ 0.125) | ≈ 209 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 306 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 358 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 M16
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.
Mating Parts for M16
Pair M16 with the matching M16 bolt or screw, plus a M16 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M16
When the joint preload approaches the proof load of M16 class 8.8, step up to M20 class 8.8 (or move to M16 class 10.9). When the joint is over-specified, M12 often saves weight and cost without losing the safety margin.
Custom manufacturing · Made to drawing
Need serrated flange lock nuts in a size this table does not list?
This page covers M16 serrated flange lock nuts. Height and across-flats are the two most often changed — a thinner nut for clearance, a larger hex for a tool that is already on the line. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
