M4 Full-Hex Open-End Blind Rivet Nuts dimensions to Trade series (full-hex open-end blind rivet nuts): coarse thread pitch 0.7 mm. Tighten to approximately 2.9 Nm at property class 8.8 in a dry, as-supplied condition.
- Coarse thread pitch
- 0.7 mm
- Tightening torque (class 8.8)
- 2.9 Nm
Figures are nominal values from the governing standard. Confirm against the tolerance class for your application before machining or ordering.
The M4 size of Full-Hex Open-End Blind Rivet Nuts is dimensioned by Trade series (full-hex open-end blind rivet nuts). The table below gives the dimensional row from the standard, followed by the drive and the installation notes for this type.
M4 Dimensional Row (Trade series (full-hex open-end blind rivet nuts))
| Thread size | Pitch (mm) | Grip ranges (mm) | Installation hole (mm) | Flange diameter (mm) | Typical torque resistance (Nu00b7m) | Material options |
|---|
| M4 | 0.7 | 0.5~2.0 | 6.0 | 9.0 | 4 | steel or aluminum alloy |
Spanner & Drive for M4 Full-Hex Open-End Blind Rivet Nuts
Drive geometry for M4 Full-Hex Open-End Blind Rivet Nuts is given by the row above; match the tool to the listed values.
Tightening Torque for M4
| Class 8.8 (dry, ~µ 0.125) | ≈ 2.9 Nm |
|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 4.1 Nm |
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| Class 12.9 (dry, ~µ 0.125) | ≈ 4.9 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 M4
| Tensile stress area As (ISO 898-1) | 8.78 mm² |
|---|
| Proof load, class 8.8 | 5.1 kN |
|---|
| Proof load, class 10.9 | 7.3 kN |
|---|
| Proof load, class 12.9 | 8.5 kN |
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| Min. ultimate tensile, class 8.8 | 7 kN |
|---|
Proof load = stress area × proof stress per ISO 898-1. Design joints so the working preload stays below the proof load of the selected class.
Installation Tips for M4 Full-Hex Open-End Blind Rivet Nuts
- At M4 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.
When to Step Up or Down from M4
When the joint preload approaches the proof load of M4 class 8.8, step up to M5 class 8.8 (or move to M4 class 10.9). When the joint is over-specified, M3 often saves weight and cost without losing the safety margin.
Applications & Industries for M4 Full-Hex Open-End Blind Rivet Nuts
Where Full-Hex Open-End Blind Rivet Nuts are used, and what decides the specification in each case. Stocked from M4 to M10.
Industries that specify Full-Hex Open-End Blind Rivet Nuts
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Trailer manufacturing
High-torque blind threads in rails and box sections.
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Electrical enclosures
Removable covers attached to thin steel or aluminum sheet.
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Solar equipment
Serviceable bracket threads in thin profiles and formed frames.
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Industrial machinery
Blind mounting points where the full-hex body must resist spin.
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Building services
Threaded rod, channel and suspension assemblies.
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Machine building & OEM
The clamping counter-face on studs and bolts throughout an assembly.
Typical applications
- resisting insert rotation with a full-hex body in the installation hole
- providing a reusable open thread without access to the back face
- specifying hole diameter, grip range and torque resistance together
- installing a threaded point after a panel or tube is closed
- completing a bolted joint on a stud, rod or bolt
- locking an adjustment so it cannot drift
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.
- Match the class
- A nut below the bolt property class strips before the bolt reaches its own limit — pair class 8 nuts with 8.8 bolts, class 10 with 10.9.
Where to use something else
- Do not use the typical torque resistance as a substitute for the parent-sheet grip and hole limits.
Full application guide: where Full-Hex Open-End Blind Rivet Nuts are used, how to specify them, and the cases they are wrong for
