M2 M2.5 M3 Brass Knurl Insert Nuts Kit 200/500pcs + Storage Box
M2 M2.5 M3 Brass Knurl Insert Nuts Kit 200/500pcs + Storage Box
Details
JARBLUE Brass Knurl Insert Nuts — M2, M2.5 & M3 Threaded Assortment Set
Get everything you need for secure, professional-grade threaded inserts in one convenient kit. This JARBLUE brass knurl insert nut assortment covers the three most popular metric sizes — M2, M2.5, and M3 — and comes neatly organized in a reusable plastic storage box. Whether you're working on 3D-printed parts, PCBs, electronics enclosures, or plastic assemblies, these heat-set brass inserts deliver a strong, lasting threaded connection.
Made in Mainland China.
Why Choose This Assortment Kit?
- CE Certified for quality and compliance assurance
- Brass construction — excellent corrosion resistance, superior conductivity, and long-lasting durability
- Knurled outer surface — bites into plastic or resin for a rock-solid, pull-out-resistant hold
- 10 size variations across M2, M2.5, and M3 threads — one kit covers a wide range of projects
- Organized plastic storage box — clearly divided compartments keep every size sorted and accessible
- Available in 200 pcs or 500 pcs — choose the quantity that fits your workload
Size Breakdown
500-Piece Kit includes:
| Size | Qty |
|---|---|
| M2 × 3 (OD 3.5mm) | 50 pcs |
| M2 × 4 (OD 3.5mm) | 50 pcs |
| M2 × 5 (OD 3.5mm) | 50 pcs |
| M2 × 6 (OD 3.5mm) | 50 pcs |
| M2.5 × 3 (OD 3.5mm) | 50 pcs |
| M2.5 × 4 (OD 3.5mm) | 50 pcs |
| M2.5 × 5 (OD 3.5mm) | 50 pcs |
| M2.5 × 6 (OD 3.5mm) | 50 pcs |
| M3 × 4 (OD 4.2mm) | 50 pcs |
| M3 × 5 (OD 4.2mm) | 50 pcs |
200-Piece Kit includes:
| Size | Qty |
|---|---|
| M2 × 3 (OD 3.5mm) | 20 pcs |
| M2 × 4 (OD 3.5mm) | 20 pcs |
| M2 × 5 (OD 3.5mm) | 20 pcs |
| M2 × 6 (OD 3.5mm) | 20 pcs |
| M2.5 × 3 (OD 3.5mm) | 20 pcs |
| M2.5 × 4 (OD 3.5mm) | 20 pcs |
| M2.5 × 5 (OD 3.5mm) | 20 pcs |
| M2.5 × 6 (OD 3.5mm) | 20 pcs |
| M3 × 4 (OD 4.2mm) | 20 pcs |
| M3 × 5 (OD 4.2mm) | 20 pcs |
Specifications
- Brand: JARBLUE
- Material: Brass
- Thread Sizes: M2, M2.5, M3
- Certification: CE
- Includes: Organized plastic storage box
- Available Quantities: 200 pcs or 500 pcs
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Frequently Asked Questions
Q: What are brass knurl insert nuts used for?
A: Brass knurl insert nuts are threaded fasteners pressed or heat-set into plastic, resin, or 3D-printed parts to create a strong, durable threaded hole. The knurled (ribbed) outer surface grips the surrounding material tightly, providing reliable holding strength for screws and bolts in assemblies that require repeated disassembly.
Q: What sizes are included in this brass insert nut assortment kit?
A: This kit includes M2, M2.5, and M3 brass knurl insert nuts in 10 different length variations (3mm, 4mm, 5mm, and 6mm lengths across the size range). The 200-piece kit provides 20 pieces per size, while the 500-piece kit includes 50 pieces per size — both stored in a clearly organized plastic box.
Q: Are these insert nuts compatible with 3D-printed parts?
A: Yes! These brass knurl insert nuts are widely used with FDM and resin 3D-printed components. They can be heat-set using a soldering iron or inserted with a press fit, embedding securely into the printed material for a metal-threaded connection that is far more durable than threading directly into plastic.
Q: Do the 200-piece and 500-piece kits come with a storage box?
A: Yes. Both the 200-piece and 500-piece kits include a reusable plastic storage box with individual compartments for each nut size, keeping your hardware organized and easy to access on the workbench.
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.