Description
This is a pack of 10 threaded brass inserts with M3 threads, might be handy for 3d printing to insert a metal thread into a hole. I have these in different lengths now, you choose which length (all the same in each pack)
- 3mm Long; or
- 4mm Long; or
- 5mm Long - Most Common - Currently Out Of Stock; or
- 6mm Long
They all have the same maimum OD (knurled section) of 4.6mm, and lead-in OD (un-knurled section) of about 3.9mm
Commonly you would print a hole with a finished size about 4 to 4.5mm, then using the tip of your soldering iron to heat it you can simply push the insert in.
This variety of inserts has knurls which run in both directions to better resist torque and pullout and a narrower unknurled lead-in to assist with self-aligning the insert into the hole.
The video (below/in images on Trade Me) is not produced by me but shows similar thread inserts and is a good comparison between the styles. Note that these thread inserts are not any brand and do not come with any documentation as shown in the video. What you see in the pictures is what you get.
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Details
Shipping & pick-up options
| Destination & description | Price | |
|---|---|---|
| Nationwide 1-2 days, Express Urban | $5.70 | |
| Nationwide 2-4 days, Rural | $11.70 | |
| Combine with another item you've paid shipping on | $0.00 | |
| Shipping more than one item | No extra charge | |
Estimated delivery times in business days
Seller does not allow pick-ups
Payment Options
Pay instantly by card and Ping balance.
Four fortnightly interest-free payments.
Questions & Answers (3)
FAQs: All stock is in Christchurch. Express Urban and Rural Standard is with Courier Post (NZ Post Courier), PO Box welcome. Pickup is not possible sorry. Tracking and GST Invoice links are emailed when shipped - CHECK YOUR SPAM. Combined shipping means you pay shipping on one item, and choose "Combine with another" on the rest. Seller comment Monday, 4 May 2026 HOW TO SAVE WITH COMBINED SHIPPING: Use the Trade Me cart or purchase each separately - choose Urban or Rural shipping option (not Economy) on one item, and choose "Combine with another" on the rest - NO LIMIT! Seller comment Monday, 4 May 2026 RURAL DELIVERY: Rural dwellers, if you have a Woolworths or NZ Post nearby did you know you can use a Parcel Collect address with NZ Post so you only have to pay urban shipping? Google NZ Post Parcel Collect to register. Seller comment Monday, 4 May 2026
M3 (3mm) Thread Insert Nut Extra Grip Centering Heat Set 10 Inserts / Pack
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