150pcs M3 Brass Knurled Insert Nuts Kit – 7 Sizes | JARBLUE
150pcs M3 Brass Knurled Insert Nuts Kit – 7 Sizes | JARBLUE
Details
JARBLUE 150pcs M3 Brass Knurled Insert Nuts Kit
Upgrade your woodworking, 3D printing, and DIY projects with this comprehensive set of 150 M3 brass knurled insert nuts. Made from high-quality brass for excellent conductivity, corrosion resistance, and long-lasting durability, these heat-set threaded inserts deliver a secure, professional-grade hold in plastic, wood, and composite materials. The knurled outer surface locks firmly into place, preventing spin-out and pull-out under load.
This kit includes seven different lengths to cover virtually every application, all conveniently organized so you always have the right size on hand. Compatible with M3 hex socket drive tools and standard soldering irons or heat-set presses for easy installation.
Kit Contents
- M3 × 3mm — 30 pcs
- M3 × 4mm — 20 pcs
- M3 × 5mm — 20 pcs
- M3 × 6mm — 20 pcs
- M3 × 8mm — 20 pcs
- M3 × 10mm — 20 pcs
- M3 × 12mm — 20 pcs
- Total: 150 pieces
Key Features
- Material: Premium brass — corrosion-resistant and electrically conductive
- Thread Size: M3 (3mm) with flat head, hex socket drive style
- Knurled Design: Deep knurling grips material firmly for a secure, permanent fit
- Versatile Use: Ideal for 3D-printed parts, woodworking, plastics, and electronics enclosures
- RoHS Certified: Free from hazardous substances
- Customizable: Compatible with standard heat-set installation tools
Specifications
| Brand | JARBLUE |
| Material | Brass |
| Thread | M3 (3mm) |
| Drive Style | Hex Socket |
| Head Style | Flat |
| Certification | RoHS |
| Quantity | 150 pcs (7 sizes) |
| Country of Origin | Made in China |
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Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What materials are these M3 brass knurled insert nuts compatible with?
A: These M3 brass knurled insert nuts are designed for use with plastics (including 3D-printed parts), wood, and composite materials. The knurled outer surface grips the surrounding material firmly when heat-set or pressed in, creating a strong, permanent threaded connection.
Q: How do I install these brass insert nuts?
A: Installation is simple — use a soldering iron or dedicated heat-set press to gently heat the nut and press it flush into a pre-drilled hole. The brass heats quickly, allowing the knurled surface to embed into the material. Allow to cool before applying any load for best results.
Q: Are these nuts RoHS certified and safe for electronics projects?
A: Yes, these JARBLUE brass insert nuts are RoHS certified, confirming they are free from restricted hazardous substances. This makes them suitable for use in electronics enclosures, PCB housings, and other sensitive assemblies.
Q: What sizes are included in this 150-piece kit?
A: The kit includes seven M3 lengths: 3mm (×30), 4mm (×20), 5mm (×20), 6mm (×20), 8mm (×20), 10mm (×20), and 12mm (×20), giving you a total of 150 brass knurled insert nuts to handle a wide variety of project depths.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.