Dimensional data for M27 Hex Nuts with Collar, 1.5d Height to DIN 6331, 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.
M27 Dimensional Row (DIN 6331)
| Size | Pitch P (mm) | a (mm) | d1 (mm) | damin (mm) | damax (mm) | Nut height m (mm) | Width across flats s (mm) | Note | Reference standard |
|---|---|---|---|---|---|---|---|---|---|
| M27 | 3.0 | 7 | 50 | 27 | 29.1 | 40 | 41 | DIN 6331 |
Spanner & Drive for M27 Hex Nuts with Collar, 1.5d Height
Drive geometry for M27 Hex Nuts with Collar, 1.5d Height is given by the row above; match the tool to the listed values.
Tightening Torque for M27
| Class 8.8 (dry, ~µ 0.125) | ≈ 1064 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 1516 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 1774 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 M27
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 M27 Hex Nuts with Collar, 1.5d Height
- At M27 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 M27
Pair M27 with the matching M27 bolt or screw, plus a M27 flat washer where required to distribute load on softer materials.
Custom manufacturing · Made to drawing
Need hex nuts with collar, 1.5d height in a size this table does not list?
This page covers M27 hex nuts with collar, 1.5d height. 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.
