A2 Stainless Steel Full-Hex Open-End Blind Rivet Nuts are supplied to ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70. Corrosion behaviour is good general corrosion resistance, the material is largely non-magnetic, and the usable service range is approx. -200 °C to +400 °C, subject to the property class and the joint. In practice this grade is the most common stainless group for indoor and general outdoor fasteners.
- Grade
- ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70
- Corrosion resistance
- Good general corrosion resistance
- Magnetic response
- Largely non-magnetic
- Service temperature
- approx. -200 °C to +400 °C, subject to the property class and the joint
Property values are typical for the grade. Certified mechanical test data is available on request for production orders.
Material specification page for full-hex open-end blind rivet nuts in A2 Stainless Steel. Covers the grade designation (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70), corrosion and magnetic behavior, comparable grades and their trade-offs, and the sizes available to Trade series (full-hex open-end blind rivet nuts).
Why Choose A2 Stainless Steel for Full-Hex Open-End Blind Rivet Nuts
The most common stainless group for indoor and general outdoor fasteners. For full-hex open-end blind rivet nuts, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70 |
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| Magnetic response | Largely non-magnetic |
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| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
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| Corrosion characteristic | Good general corrosion resistance |
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Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Full-Hex Open-End Blind Rivet Nuts in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Comparable Grades
For Full-Hex Open-End Blind Rivet Nuts, the alternative stainless grade is A4 (316). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.
Using Stainless Fasteners in Aluminum
Stainless steel is more noble than aluminum, so in the presence of an electrolyte — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. The effect is driven by the area ratio: a small stainless fastener in a large aluminum section is normally acceptable, while a large stainless fastener in thin aluminum is not. Where the joint is wet, isolate the two metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.
Sizes of Full-Hex Open-End Blind Rivet Nuts Available in A2 Stainless 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
