Property Class 8.8 Steel Full-Hex Open-End Blind Rivet Nuts are supplied to ISO 898-1 property class 8.8. Corrosion behaviour is requires plating (zinc) for corrosion protection, the material is magnetic, and the usable service range is commonly limited to approx. +300 °C; confirm against the coating and the load. In practice this grade is the workhorse medium-carbon alloy class for structural joints.
- Grade
- ISO 898-1 property class 8.8
- Corrosion resistance
- Requires plating (zinc) for corrosion protection
- Magnetic response
- Magnetic
- Service temperature
- commonly limited to approx. +300 °C; confirm against the coating and the load
Property values are typical for the grade. Certified mechanical test data is available on request for production orders.
Property Class 8.8 Steel Full-Hex Open-End Blind Rivet Nuts combine the dimensional form of Trade series (full-hex open-end blind rivet nuts) with the material properties of grade ISO 898-1 property class 8.8: requires plating (zinc) for corrosion protection, magnetic, service range commonly limited to approx. +300 °C; confirm against the coating and the load. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.
Why Choose Property Class 8.8 Steel for Full-Hex Open-End Blind Rivet Nuts
The workhorse medium-carbon alloy class for structural joints. For full-hex open-end blind rivet nuts, this matters when requires plating (zinc) for corrosion protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 8.8 |
|---|
| Magnetic response | Magnetic |
|---|
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
|---|
| Corrosion characteristic | Requires plating (zinc) for corrosion protection |
|---|
Galvanic & Galling Considerations
For full-hex open-end blind rivet nuts in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Comparable Grades
For Full-Hex Open-End Blind Rivet Nuts, class 10.9 or 12.9 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of Full-Hex Open-End Blind Rivet Nuts Available in Property Class 8.8 Steel
| 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 |
| M5 | 0.8 | 0.5~2.5 / 2.5~5.0 | 7.0 | 10.0 | 6.5 | steel or aluminum alloy |
| M6 | 1.0 | 0.5~3.0 / 3.0~5.5 | 9.0 | 12.7 | 12 | steel or aluminum alloy |
| M8 | 1.25 | 1.0~3.5 / 3.5~5.5 | 11.0 | 16.0 | 31 | steel or aluminum alloy |
| M10 | 1.5 | 1.0~3.5 / 3.5~6.0 | 12.0 | 18.0 | 42 | steel or aluminum alloy |
Applications & Industries
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
