How do I install FFVRVSS M3 brass threaded inserts?

Install by heating a soldering iron to 200-250°C for PLA or 350-400°C for PETG/ABS. Press the insert straight into a pre-drilled pilot hole (slightly smaller than 4mm) until flush, holding steady for 3-5 seconds for the plastic to cool and lock it in place.

What thread size and standard does this fitting nut use?

This kit uses M3 thread size inserts with a 4.2mm length and 3mm outer diameter. The internal thread is M3, designed to accept standard M3 screws. Always ensure your screw and pilot hole match these specifications for a secure fit.

What material is this fitting nut made from?

These inserts are made from high-quality, lead-free brass, which offers excellent thermal conductivity for easy installation and superior corrosion resistance for long-term durability in plastic components.

Are these threaded inserts safe for all 3D printing plastics?

Yes, these inserts are designed for universal compatibility with most thermoplastics, including PLA, PETG, ABS, PPS, and PP. Their heat-set installation method works effectively across these materials.

How to choose the best threaded inserts for 3D printing?

Choose inserts based on your plastic type, required thread size (M3 here), and desired strength. FFVRVSS M3 inserts feature 45-degree spiral knurling for superior torque resistance, making them an excellent choice for robust connections in 3D printed projects.

Can I use these M3 inserts daily for frequent assembly/disassembly?

Yes, the brass inserts create strong, reusable threaded connections in plastic. They are designed for repeated screw insertion and removal without stripping the plastic, making them ideal for applications requiring regular maintenance or adjustments.

What are the benefits of using brass threaded inserts over plastic threads?

Brass inserts provide significantly stronger, more durable, and wear-resistant threads compared to directly tapping plastic. They prevent stripping, withstand higher torque, and allow for repeated assembly without damaging the printed part, enhancing the longevity of your projects.

How to buy an original FFVRVSS M3 Brass Threaded Inserts Kit in India?

Purchase the original FFVRVSS M3 Brass Threaded Inserts Kit from crowcrowcrow.com, sourced directly from authorized US retailers and authorized brand partners and factory-sealed. All customs duties and GST are included in the price, with delivery via ExpressBox tracked shipping to your Indian pincode.

FFVRVSS M3 Brass Threaded Inserts 200Pcs | Heat Set for 3D Printing India

Name: FFVRVSS M3 Brass Threaded Inserts Kit 200Pcs (M3x4x4.2mm) | Heat Set for 3D Printing
Brand: FFVRVSS
SKU: swk8332
Price: 1372.00 INR
Availability: InStock

About this item

FFVRVSS M3 Brass Threaded Inserts provide a durable solution for adding strong, reusable metal threads to your 3D printed parts. This kit includes 200 lead-free brass inserts in the M3x4x4.2mm size, perfect for a wide range of projects. The 45-degree spiral knurling ensures maximum torque resistance and pull-out strength, outperforming standard straight-thread inserts. Compatible with common thermoplastics like PLA, PETG, and ABS, these inserts are essential for makers and hobbyists looking to enhance their prints.

Installation is straightforward using a soldering iron (not included). Heat the iron to 200-250°C for PLA or 350-400°C for PETG/ABS, press the insert into a pre-drilled pilot hole until flush, and hold for 3-5 seconds. The plastic cools and locks the insert securely in place. This kit is perfect for electronics enclosures, circuit board mounting, toy assembly, and furniture repair, offering a reliable threaded connection in plastic components. The included organized case keeps all 200 pieces readily accessible.

Imported directly from authorized US retailers and authorized brand partners, these FFVRVSS inserts offer superior quality compared to generic local alternatives. All customs duties and GST are included in the listed price, with delivery via ExpressBox tracked shipping to your Indian pincode. Ensure your 3D prints have robust, long-lasting threaded connections with this essential kit.

Key Features

3D PRINTING INSERT KIT — 200Pcs M3x4x4.2mm lead-free brass heat set threaded inserts in one organized labeled case. No more buying loose inserts separately - everything to add strong reusable metal threads to plastic 3D printed parts, ready to install.
PREMIUM LEAD-FREE BRASS — High-quality lead-free brass with excellent thermal conductivity and corrosion resistance. Withstands above 300°C/572°F. Clean, precise threads resist stripping, breaking, and deformation for reliable long-term use.
BUILT FOR MAKERS AND HOBBYISTS — Designed for 3D printing enthusiasts, prototypers, and DIY repair. Works with all thermoplastics including PLA, PETG, ABS, PPS, and PP. Ideal for electronics, toys, furniture, automotive casings, and laptop housings.
45-DEGREE SPIRAL KNURLING — Opposing spiral knurling delivers high torque resistance and pull-out strength vs straight inserts. No countersinking - heat with a soldering iron (not included) and press in for a firm, permanent hold.
ORGANIZED AND READY TO USE — 200pcs of the most popular M3 size in a labeled compartment for quick access. Compact sturdy case fits any toolbox. Backed by strict quality inspection and responsive customer support.

Why choose this product

Engineered for 3D Printing Durability

These FFVRVSS M3 brass threaded inserts are specifically designed to overcome the limitations of plastic threads in 3D prints. The lead-free brass material offers excellent thermal conductivity for easy heat-set installation and superior corrosion resistance. Unlike straight inserts, the 45-degree spiral knurling provides exceptional torque and pull-out strength, ensuring your connections remain secure even under stress. This kit is ideal for makers who need reliable, long-lasting threaded connections in their prototypes and final products.

Ideal for Makers, Skip if...

Perfect for 3D printing enthusiasts, electronics projects, and DIY repairs requiring robust threaded connections in PLA, PETG, ABS, and other thermoplastics. Skip if you need metric M4 or larger sizes, or if you require inserts for metal applications. Not suitable for direct use without a soldering iron and appropriate pilot holes.

How to use

Print or drill a pilot hole slightly smaller than 4mm (the insert's outer diameter) in your 3D printed part where the thread is needed. — Prepare Pilot Hole
Set your soldering iron temperature to 200-250°C for PLA or 350-400°C for PETG/ABS and other higher-temperature thermoplastics. — Heat Soldering Iron
Place the brass insert onto the pilot hole and press it straight in using the heated soldering iron tip until it sits flush with the plastic surface. — Press Insert
Hold the insert steady for 3-5 seconds while the surrounding plastic cools and solidifies, creating a strong, permanent mechanical lock for the thread. — Allow to Cool

Example scenarios

Typical situations where FFVRVSS M3 Brass Threaded Inserts Kit 200Pcs (M3x4x4.2mm) | Heat Set for 3D Printing helps — illustrative scenarios, not customer reviews.

Scenario 1

Illustrative example

Where it helps

A hobbyist in Bangalore needs to add secure, removable threaded connections to a custom 3D printed drone frame.

How this product helps

Using the FFVRVSS M3 brass inserts allows for strong, repeatable screw mounting of components. The heat-set installation ensures a permanent hold in the plastic, while the M3 threads allow for easy assembly and disassembly of parts.

Scenario 2

Illustrative example

Where it helps

A maker in Delhi is assembling an electronics enclosure for a Raspberry Pi project and wants durable mounting points for the circuit board.

How this product helps

The 200-piece kit provides ample M3 inserts to securely mount the circuit board and other components. The brass construction offers better thermal conductivity during installation and superior strength compared to directly tapping the plastic.

Specifications & installation

Specifications

Primary Material	Lead-Free Brass
Thread Type	Internal Female Thread

Installation & usage

Installation Temperature	200-250°C (PLA), 350-400°C (PETG/ABS)
Pilot Hole Diameter	Slightly smaller than 4mm
Hold Time	3-5 seconds
Cost per use	200 pieces at ₹1,372 — ₹6.86 per piece
Shelf life after opening	Indefinite (stored properly)
Contraindications	Not for metal applications; requires soldering iron and pilot holes.
Allergens / common irritants	None identified

How we compare

Feature	FFVRVSS M3 Brass	Others
Material	Lead-Free Brass	Often brass or zinc-plated steel; quality varies
Thread Design	45-Degree Spiral Knurling for High Torque Resistance	May be straight-threaded or have less aggressive knurling
Quantity	200 Pieces (M3x4x4.2mm)	Varies by pack; often fewer pieces or multi-size kits
Installation	Heat-set with soldering iron; no countersinking needed	Similar heat-set method; some may require pilot hole prep
Cost per piece	200 pieces at ₹1,372 — ₹6.86 per piece	Local packs may range from ₹5-15 per piece depending on quantity and material

SKU	swk8332
Brand	FFVRVSS
Product Name	M3 Brass Threaded Inserts Kit
Model Number	M3 Threaded Inserts #4-40 (UNC)
Set Name	200Pcs M3x4x4.2
Quantity	200 Pieces
Thread Size	M3x4x4.2mm
Outer Diameter	3 mm
Material	Lead-Free Brass
Finish Type	Brass
Knurling	45-Degree Spiral
Compatibility	PLA, PETG, ABS, PPS, PP, Thermoplastics
Installation Method	Heat Set (Soldering Iron Required)
Item Weight	48 grams
Package Dimensions	6.4 cm x 6.5 cm x 1.5 cm (2.6 x 2.6 x 0.65 inches)
Country of Origin	Not stated by manufacturer — US retail version, sourced from authorized US retailers and authorized brand partners

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FFVRVSS M3 Brass Threaded Inserts Kit 200Pcs (M3x4x4.2mm) | Heat Set for 3D Printing

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