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3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit Brass Heat Set Insert for Plastic and 3D Components
ERHT

3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit Brass Heat Set Insert for Plastic and 3D Components

Bottom line: The 3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female ($14.99 on Amazon as of 2026-10-06): Covers M2, M2.5, M3, M4, M5, M6 and M8 in one kit for 18.99; main trade-off: soldering iron not included, only the brass heating rod and tips.

$14.99

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Buy on Amazon — $14.99 Also on eBay → Compare to similar tools & maintenance

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For PC and retro-hardware cleaning and maintenance tools, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Covers M2, M2.5, M3, M4, M5, M6 and M8 in one kit for 18.99
  • ✓ Six tips plus brass heating rod included, no separate tip sourcing
  • ✓ Shortened tip design speeds insert seating on 3D printed parts
  • ✓ M2 and M2.5 share one tip, cutting tip swaps on small hardware

Cons

  • ✗ Soldering iron not included, only the brass heating rod and tips
  • ✗ Listing does not state insert quantity per thread size
  • ✗ No stated iron temperature range or wattage compatibility
  • ✗ ERHT is a low-profile brand with limited support documentation

Manufacturer description

This toolset is designed specifically for hot sleeve plugins that insert 3D printed parts, with a shorter and faster tip. Each tip is perfectly matched with the corresponding copper nut insert, making it easy to install, and more importantly, you can obtain a smooth and clean insert.

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SpecPicks Verdict

SpecPicks scored 3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female… using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. ERHT's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 【Heat Set Insert Tips Tool】 1 brass iron rod and 6 tips heat-set inserts M2 M2.5 M3 M4 M5 M6 M8. M2 and M2.5 share a common tip. NOTE: It includes the hot iron heating rod, but not the iron itself.

Full Specifications

BrandERHT
ColorGold
Model360Pcs Threaded Inserts
MaterialBrass
Size NameM2, M2.5, M3, M4, M5, M6
Metal TypeBrass
Drive StyleSpline
Part Number360Pcs Threaded Inserts
Thread SizeM2,M2.5,M3,M4,M5,M6
Thread TypeIso Metric
Finish TypesPolished
Thread ClassClass 2A
Thread StyleRight Hand
Fastener TypeKnurled
Item Diameter6 millimeters
Material TypeBrass
Exterior FinishBrass
Item Dimensions5 x 3 x 1 inches
Number Of Items1
Number of Packs1

Ready to buy?

3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit Brass Heat Set Insert for Plastic and 3D Components is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $14.99

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit Brass Heat Set Insert for Plastic and 3D Components
$14.99
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