100workfromhome 
Best results for m4 helicoil drill size
SEDY 131Pc Thread Repair Kit, HSS Drill Helicoil Repair Kit Metric M5 M6 M8 M10 M12
$32.99
$37.61
Amazon.com
Last update was on: June 8, 2025 2:23 pm
- This Thread Repair kit is Used to Repair or Replace Damaged or Stripped Internal Screw Threads.
- Ideal for Restoring Damaged Threads, Suitable for Engine Repair and Other Automotive Applications
- The kit Has Altogether 131 Pieces, All Made According to Professional Standard.
- Lt Has One HSS Tap for Each Size, One HSS Drill for Each Size, 2 Insert Tools for Each Size, Thread Inserts for Each Size, All Come Complete in a Handy Storage Case.
#4-40 x 0.135" Qty 50 Threaded Heat-Set Inserts used for connecting 3D printed and injection molded parts.
$9.95
$11.94
Amazon.com
Last update was on: June 8, 2025 2:23 pm
- Brass inserts help you to connect your 3D printed parts and enclosures.
- Press into 3D printed parts with heated tip (Virtjoule installation tips ASIN: B078K72615 and B07GNX86BB). Tip with insert on it melts plastic and forms tight bond. You can then use a #4-40 machine screw giving a strong connection.
- Your 3D printed parts can be more easily assembled and disassembled multiple times. Placing a screw into regular plastic does not hold as well and will likely strip the plastic if done more than once, making it hard to reassemble with any connection strength.
