Metric Aluminum Thinwall Half Hex Low Profile Head Rivet Nuts
What are metric aluminum half hex rivet nuts? These are blind threaded inserts with an aluminum body threaded to metric sizes, a half hex shank, and a low profile head. The hex section keys into a matching hex hole so the insert is locked against rotation regardless of how soft the panel is, and the aluminum body avoids corroding an aluminum panel around the hole. It is the most durable rivet nut specification available for metric aluminum work. AlbanyCountyFasteners.com stocks M6.
The combination that suits aluminum motorcycle and equipment frames
Three constraints land on the same fastener in this application. The frame is aluminum, so a stainless insert would corrode the material around every hole once road spray and washing get to it. The hardware is metric, so an inch thread is useless. And aluminum is soft, so a friction-based insert has the least favourable material to grip and is most likely to spin under a torqued bolt. A metric aluminum half hex insert answers all three: matched material, matched thread, and geometric anti-rotation that does not care how soft the panel is. That is why it shows up on frame accessory mounts where the alternative has already failed once.
Why choose metric aluminum half hex rivet nuts
- Accepts standard metric bolts on imported equipment and vehicles
- Hex body gives anti-rotation independent of panel hardness
- No galvanic couple against aluminum frames and panels
- Particularly effective in soft aluminum where friction grip is unreliable
- Easy to set by hand compared with stainless
- Low profile head minimises installed height
Size and grip range
- M6-1.0, 0.7 to 4.2mm grip range
- Requires a hex hole matched to the body across-flats dimension
- Measure panel thickness against the grip range before ordering
- For other metric threads in aluminum, see our ribbed rivet nut range
Common applications
- Aluminum motorcycle frames and subframes
- Accessory mounting points on metric aluminum chassis
- Aluminum panels on imported vehicles and equipment
- Aluminum enclosures using metric hardware
- Marine aluminum structures with metric fittings
- Joints where a friction insert has spun before
For inch threads, see our aluminum half hex rivet nuts. For steel panels or higher load, metric stainless half hex inserts carry considerably more.
Related Categories
- Low Profile Head Half Hex Rivet Nuts
- Metric Stainless Half Hex Rivet Nuts
- Half Hex Rivet Nuts
- Ribbed / Knurled Rivet Nuts
- Rivet Tools
Metric Aluminum Half Hex Rivet Nut FAQs
Will this hold an accessory on a motorcycle frame?
For normal accessory loads in sound material, yes, and the hex body makes it far more resistant to spinning than a ribbed or smooth insert. For structural or safety critical mounting, consult the frame manufacturer before drilling.
How do I punch a hex hole in a frame tube?
It is difficult on a curved or closed section, which is the main practical limitation. Where a hex hole cannot be formed, use a ribbed insert in a drilled hole instead and accept the lower torque resistance.
What hex dimension does M6 need?
Matched to the body across-flats, specified per insert and larger than the thread. Confirm the dimension before buying a punch.
Can I use an inch bolt?
No. The thread is M6 and accepts only metric hardware. A 1/4-20 bolt will cross-thread and ruin the insert.
Is aluminum strong enough here?
For torque resistance the hex geometry does the work, so material matters less. For thread strength and pull-out, aluminum carries less than stainless, so size the insert to the load.
Do I need a metric mandrel?
Yes, matched to the M6 thread. Most rivet nut tool kits include mandrels covering common metric sizes.