M3 aluminium flat head rivnut with knurled anti-spin body, angled view

M3 Aluminium Rivnut Flat Head Threaded Insert Rivet Nut (Nutsert)

M3
$0.62 NZD
each Save 10% at 25+
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SKU: FST-RIVNUT-M3-AL

M3 Aluminium Rivnut Flat Head Threaded Insert Rivet Nut (Nutsert)

$0.62 NZD
SizeM3
Availability:
Dispatch: Within 24 hours 7-day dispatch, excluding public holidays

NZ Post: 1-2 days urban · 2-4 days rural

Shipping from $5.99 urban / $9.99 rural.

Buy more, pay less Prices shown are per unit. Add enough of this item and the lower rate applies on its own at checkout. There is no code to enter and you do not need to buy a pack. Choosing a tier here just sets the quantity for you. Larger quantities go out in the same bag, so packing, handling and postage cost us less per unit. We pass that saving straight on to you, so you can buy more for less.

Minimum order quantity: 10

Easy 30-day returns · 12-month warranty

Free Urban delivery on orders over $66
Urban $66 Rural $88

An M3 aluminium rivnut, also known as a threaded insert, rivet nut or nutsert. It gives you a strong M3 machine-thread in thin sheet, tube or panel where you cannot reach the back to hold a normal nut. You set it from one side with a rivnut tool, and the knurled body grips the hole so it will not spin. The flat head sits neatly against the surface. Aluminium keeps it light and rust free, and it is easy to set with hand tools.


  • M3 thread, ready for standard bolts and screws
  • Aluminium alloy, light and corrosion resistant
  • Flat head sits flush against the panel
  • Knurled body resists spinning once set
  • Blind fixing, only needs access to one side
  • Suits panels roughly 0.5mm to 3.0mm thick
  • Great for thin metal, plastic and tube
  • More thread sizes coming soon

Specifications

Thread sizeM3 (M3 x 0.5)
MaterialAluminium alloy
Head styleFlat head (small flange)
BodyKnurled, anti-spin
Body diameter4.5mm
Length9mm
Mounting hole5.0mm drill
Grip rangeAbout 0.5mm to 3.0mm

What's in the box

10+
M3 aluminium flat head rivnuts

Priced per rivnut with a minimum order of 10. Set your quantity at checkout, and bulk pricing kicks in as you add more.

Great for

Adding threads to thin sheet metal
Tube, box section and hollow frames
Car, motorbike and 4WD panel work
Enclosures, brackets and covers
3D printer and CNC frame builds
Any spot where you cannot reach the back

How to set a rivnut

  1. Drill the hole

    Make a clean 5.0mm hole in your panel and clear any burrs.

  2. Load the tool

    Wind the rivnut onto the mandrel of your rivnut or nutsert tool until the head sits flat.

  3. Insert into the hole

    Push the rivnut into the hole so the flat head rests against the surface.

  4. Squeeze to set

    Work the tool to compress the body. It bulges out behind the panel and locks in place, leaving you a clean M3 thread.

Common questions

What size hole do I drill?

A 5.0mm hole suits the 4.5mm knurled body with a little clearance. Keep it snug so the knurls bite and stop the rivnut turning.

Do I need a special tool?

Yes, a rivnut or nutsert setting tool does the job cleanly. In a pinch you can set one with a bolt, a nut and a couple of washers, but a proper tool is faster and more reliable for a batch.

Aluminium or steel, which should I pick?

Aluminium is lighter, will not rust and sets easily with hand tools, so it is ideal for thin sheet, plastic and general work. Choose a steel rivnut when you need maximum thread strength or high clamping loads.

How thick a panel can it clamp?

This M3 size grips material from about 0.5mm up to around 3.0mm thick. For thicker work you would step up to a longer body or larger thread.

Will it spin in the hole?

The knurled body is made to dig into the edge of the hole as it sets, which stops it spinning when you tighten a bolt into it.

Good to know: This listing is the M3 aluminium size, sold per rivnut with a minimum order of 10. More thread sizes are on the way. Shipped fast from our own stock here in New Zealand.

Why Buy from NZN

Useful parts, fair prices and someone local to help.

I'm Lukas, an engineering student and maker based in Te Awamutu. NZN grew out of a CNC build that dragged on for months because every missing cable, bolt or electronic part meant another overseas order. I started the shop so Kiwi makers can spend more time building and less time waiting for the next parcel.

  • Stocked here in New Zealand

    Orders are picked and packed in Te Awamutu and dispatched within 24 hours every day, excluding public holidays. NZ Post target delivery is 1-2 days urban and 2-4 days rural.

  • Fair prices, clearly shown

    Prices are kept competitive and quantity discounts are shown upfront. Free delivery starts at $66 for urban addresses and $88 for rural addresses.

  • 30-day returns and 12-month warranty

    Get in touch if something is not right and we will help sort it.

  • Practical product support

    Ask a product question and get help from a real person in New Zealand who knows the range.

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