The M8X1 size of Fine-Thread Hex Head Cap Screws, Fully Threaded is dimensioned by ISO 8676 / DIN 961. The tables below give the dimensional row from the standard, the drill and spanner sizes that go with it, and the assembly torque per property class. The technical drawing on this page redraws to the exact values selected.
M8X1 Dimensional Row (ISO 8676 / DIN 961)
| Size | Type | Pitch P (mm) | c (mm) | dw (mm) | Width across corners e (mm) | Head height k (mm) | r (mm) | Width across flats s (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|
| M8x1 | Hex head screw | 1.0 | 0.3 | 11.6 | 14.38 | 5.3 | 0.4 | 13.0 | 8~120 | ISO 8676 / DIN 961 |
Spanner & Drive for M8X1 Fine-Thread Hex Head Cap Screws, Fully Threaded
Drive geometry for M8X1 Fine-Thread Hex Head Cap Screws, Fully Threaded is given by the row above; match the tool to the listed values.
Hole Sizes for M8X1
| Coarse-thread pitch (ISO 724) | 1 mm |
|---|---|
| Through-hole / clearance (ISO 273 medium) | 9 mm |
| Tapping drill, coarse thread | 7 mm |
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
| Tensile stress area As (ISO 724) | 39.2 mm² |
|---|---|
| Proof load, class 8.8 | 23 kN |
| Proof load, class 10.9 | 33 kN |
| Proof load, class 12.9 | 38 kN |
| Min. ultimate tensile load, class 8.8 | 31 kN |
Proof load = tensile stress area × the proof stress Sp of the class, per ISO 898-1 — Sp is a lower figure than the yield stress Rp0.2 and the two are not interchangeable. The stress area is computed from this size's own diameter and pitch, so a fine-pitch designation gives the fine-pitch figure. Design the joint so the working preload stays below the proof load of the class selected.
M8X1 Fine-Thread Hex Head Cap Screws, Fully Threaded Weight
A steel M8X1 fine-thread hex head cap screws, fully threaded at the listed 8,120 mm length weighs approximately 328,468 g each — about 328,468 kg per 1,000 pieces. Stainless A2/A4 weighs roughly the same (density 7.9–8.0 g/cm³).
Actual weight varies slightly with head form, thread and finish; use this figure for freight estimation only.
Installation Tips for M8X1 Fine-Thread Hex Head Cap Screws, Fully Threaded
- 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
For M8X1, pair with a M8X1 hex nut (ISO 4032 / DIN 934) and, where used, a M8X1 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.
Custom manufacturing · Made to drawing
Need fine-thread hex head cap screws, fully threaded in a size this table does not list?
This page covers M8X1 fine-thread hex head cap screws, fully threaded. Material and finish are usually what drives a special — a grade the standard part is not stocked in, or a coating chosen against a salt-spray figure instead of a default. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
