The M8X1 size of Fine-Thread All-Metal Hex Flange Lock Nuts is dimensioned by ISO 12126. 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.
M8X1 Dimensional Row (ISO 12126)
| Size | Pitch P (mm) | c (mm) | d_a_max (mm) | d_a_min (mm) | d_c_max (mm) | d_w_min (mm) | Width across corners e (mm) | h_max (mm) | h_min (mm) | m_min (mm) | m_w_min (mm) | Width across flats s (mm) | s_min (mm) | r_max (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M8x1 | 1 | 1.2 | 8.75 | 8 | 17.9 | 15.8 | 14.38 | 9.4 | 8.74 | 7.64 | 4.6 | 13 | 12.73 | 0.5 | ISO 12126 |
Spanner & Drive for M8X1 Fine-Thread All-Metal Hex Flange Lock Nuts
Drive geometry for M8X1 Fine-Thread All-Metal Hex Flange Lock Nuts is given by the row above; match the tool to the listed values.
Tightening Torque for M8X1
| Class 8.8 (dry, ~µ 0.125) | ≈ 26 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 38 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 45 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 M8X1
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 M8X1 Fine-Thread All-Metal Hex Flange Lock Nuts
- At M8X1 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 M8X1
Pair M8X1 with the matching M8X1 bolt or screw, plus a M8X1 flat washer where required to distribute load on softer materials.
Custom manufacturing · Made to drawing
Need fine-thread all-metal hex flange lock nuts in a size this table does not list?
This page covers M8X1 fine-thread all-metal hex 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.
