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ruthex

ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components

Name: ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing
Brand: ruthex
SKU: B08BCRZZS3
Price: 9.99 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-06

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$9.99

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*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.

Bottom line: The ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components is a niche pick — read recent reviews before buying in the power supplies & cables category, priced around $9.99. Compare close alternatives before committing.

The ruthex RX-M3x5.7 threaded insert set gives you 100 brass heat-set nuts sized for M3 hardware, each 5.7 mm long, so your 3D printed parts get real reusable metal threads instead of screws biting into plastic. You install them with a soldering iron tip or an ultrasonic horn: heat the insert, press it into a blind or through hole, and let the surrounding plastic flow into the knurling. The opposing spiral knurl pattern is the key detail here, resisting both pull-out and the torque that strips a printed thread on the second assembly. Brass construction adds corrosion resistance and conducts…

SpecPicks Verdict

SpecPicks scored ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the power supplies & cables category. ruthex's power supplies & cables lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Mixed or limited buyer feedback at this price point — focus your evaluation on recent reviews that specifically address build quality and long-term reliability, and shortlist one or two close alternatives before deciding.

Common buyer scenarios for power supplies & cables of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Backed by ruthex's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

M3 THREAD INSERTS FOR YOUR 3D PRINTED PARTS: The ruthex threaded nuts can be retrofitted by heat or ultrasound into parts of 3D printers from e.g. Anycubic or Prusa. With the help of heat from a soldering iron or ultrasonic, the insert nuts are simply embedded in a blind- or through hole
FIXED HOLD WITH EASY APPLICATION: Thanks to the geometry of the threaded sleeve, the threaded sleeve holds it firmly in the pressure part. The opposing spiral-shaped knurled nuts ensure a balanced high tightening and loosening torque, as well as a high tightening force. The guide has made insertion much easier
STABLE & LONG-LASTING THREAD INSERTS: The inserts with internal thread brass, which ensures optimum corrosion resistance and thermal conductivity. This means that each insert nut can be used for a long time and is easy to use. The reusability of the insert nut is also possible by carefully removing them from the pressure part when they are no longer needed
SUITABLE FOR A VARIETY OF PLASTICS: The inserts are designed for all thermoplastics. For example, the knurled nuts hold in PLA, PETG, ABS, PPS, PP and many more. As soon as the plastic of the part around the brass sleeve cools and hardens, the threaded sleeve is firmly anchored
PRACTICAL THREAD INSERT SET: The ruthex thread insert set are lead free RX-M3x5,7 consists of 100 insert nuts with M3 internal thread and a length of 5.7 mm. The threaded sleeves can be inserted by ultrasonic and heat embedding

Full Specifications

Brand	ruthex
Color	Metric Threaded Insert
Model	GE-M3x57-001
Material	Brass
Set Name	ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7
Size Name	M3x5.7 (100pcs)
Metal Type	Brass
Unit Count	100 Count
Drive Style	Spline
Part Number	GE-M3x57-001
Thread Size	M3
Thread Type	Straight
Finish Types	Brass
Thread Class	Class 2A
Thread Style	Right Hand
Fastener Type	Insert
Item Diameter	3 millimeters
Material Type	Brass
Exterior Finish	Brass
Item Dimensions	4.72 x 3.54 x 0.39 inches

Ready to buy?

ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components is sold on the used and vintage market, where eBay carries the live inventory — Amazon does not stock this part. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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*Price sourced from Amazon.com. Last updated 2026-08-26. Price and availability subject to change.