# FFVRVSS M3 Brass Threaded Inserts Kit 200Pcs (M3x4x4.2mm) | Heat Set for 3D Printing **Brand:** FFVRVSS **SKU:** swk8332 **ASIN:** B0H1VC1327 **Canonical URL:** https://crowcrowcrow.com/p/ffvrvss-200pcs-brass-threaded-inserts-kit-m3x4x4-2-heat-set-printing/swk8332 **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹1,146 **Discount:** 30% **Customer rating:** 5.00/5 from 1 ratings ## Description FFVRVSS M3 Brass Threaded Inserts Kit offers 200 heat-set inserts (M3x4x4.2mm) for strong metal threads in 3D prints. Features spiral knurling for superior grip. Ideal for electronics and projects in India. Arrives via ExpressBox tracked delivery. ## Highlights - 200-Piece M3 Bulk Pack — Sufficient quantity for multiple projects, providing M3x4x4.2mm heat-set inserts for reliable threaded connections in thermoplastics without needing to buy multiple small kits. - Superior Grip & Strength — 45-degree opposing spiral knurling offers significantly higher torque resistance and pull-out strength compared to straight-thread inserts, ensuring a secure fit. - Lead-Free Brass Construction — Excellent thermal conductivity and corrosion resistance allow for high-temperature installation (above 300°C) and durable, long-lasting threads in plastic components. - Organized Storage Case — Includes a labeled compartment case for quick and easy access to the correct M3 insert size, keeping your workspace tidy and efficient. ## 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 1. 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 2. 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 3. 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 4. 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 ## Product details | Field | Value | |---|---| | Primary Material | Lead-Free Brass | | Thread Type | Internal Female Thread | | 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 ₹1,146 — ₹5.73 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 | | 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 | ## Frequently asked questions ### 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 factory-sealed. All customs duties and GST are included in the price, with delivery via ExpressBox tracked shipping to your Indian pincode. ## Compliance No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging. ## Images 1. https://images.crowcrowcrow.com/B0H1VC1327-0.webp 2. https://images.crowcrowcrow.com/B0H1VC1327-3.webp 3. https://images.crowcrowcrow.com/B0H1VC1327-6.webp 4. https://images.crowcrowcrow.com/B0H1VC1327-9.webp 5. https://images.crowcrowcrow.com/B0H1VC1327-12.webp 6. https://images.crowcrowcrow.com/B0H1VC1327-15.webp --- Source: https://crowcrowcrow.com/p/ffvrvss-200pcs-brass-threaded-inserts-kit-m3x4x4-2-heat-set-printing/swk8332 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 13-15 days. Prices are all-inclusive (duties + GST).