# FFVRVSS M4x6x5.5 Brass Threaded Inserts Kit (100 Pcs) | Heat Set for 3D Printing **Brand:** FFVRVSS **SKU:** qcm0801 **ASIN:** B0H1VFPMSD **Canonical URL:** https://crowcrowcrow.com/p/ffvrvss-100pcs-brass-threaded-inserts-kit-m4x6x5-5-heat-set-printing/qcm0801 **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹1,144 **Discount:** 30% ## Description FFVRVSS M4x6x5.5 brass threaded inserts (100 Pcs) offer strong, reusable metal threads for 3D prints and plastic parts. Lead-free brass with 45° spiral knurling ensures high torque resistance. Works with PLA, PETG, ABS. Organized case included. ## Highlights - 100 Pcs M4 Bulk Pack — Sufficient quantity for dozens of projects, providing M4x6x5.5mm heat set brass inserts for immediate use without needing multi-size kits. Ensures you have enough for your 3D printing and repair needs. - High Torque Resistance — Features 45-degree opposing spiral knurling for superior grip and pull-out strength compared to straight-thread inserts, ensuring secure connections in thermoplastics. - Lead-Free Brass Construction — Excellent thermal conductivity and corrosion resistance, withstanding temperatures above 300°C. Provides clean, precise threads that resist stripping for reliable, long-term use. - Easy Heat-Set Installation — No countersinking required. Simply heat a soldering iron and press the insert into a pilot hole for a firm, permanent hold as the plastic cools. ## Key features - 【3D PRINTING INSERT KIT】 100Pcs M4x6x5.5mm 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】 100pcs of the most popular M4 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 **Superior Thread Strength for 3D Prints** — FFVRVSS M4 brass threaded inserts are engineered to solve the problem of weak, easily stripped screw holes in 3D printed parts. Unlike direct plastic threads, these inserts provide robust, reusable metal threads that withstand higher torque and repeated use. The 45-degree spiral knurling ensures maximum grip, preventing pull-out even in demanding applications. This means your 3D printed creations, from electronics enclosures to functional prototypes, will have reliable, long-lasting connections. **Ideal for Makers, Skip if...** — Perfect for 3D printing enthusiasts, DIY repairers, and electronics hobbyists needing durable threaded connections in PLA, PETG, ABS, and other plastics. Skip if you require inserts for metal applications or if your project involves extreme vibration without proper locking mechanisms. Not suitable for direct use without a heat source like a soldering iron. ## How to use 1. Print or drill a pilot hole slightly smaller than the insert's outer diameter (approx. 5mm for M4x6x5.5mm). Ensure the hole is clean and straight for optimal insert seating. — Prepare Pilot Hole 2. Heat your soldering iron to the appropriate temperature: 200-250°C for PLA, or 350-400°C for PETG/ABS and other higher-temperature plastics. Ensure the iron tip is clean. — Heat Soldering Iron 3. Align the insert with the pilot hole and press it straight down using the heated soldering iron tip. Apply steady pressure until the insert is flush with the plastic surface. — Press Insert into Hole 4. Hold the insert steady for 3-5 seconds while the surrounding plastic cools and solidifies. This allows the molten plastic to flow around the knurling, creating a strong, permanent bond. — Allow Plastic to Cool ## Product details | Field | Value | |---|---| | Primary Material | Lead-Free Brass | | Thread Type | Internal Metric Thread | | Temperature Resistance | Above 300°C (572°F) | | Installation Method | Heat Set (Soldering Iron Required) | | Recommended Pilot Hole Size | Slightly smaller than 5mm (insert OD) | | Recommended Iron Temperature | 200-250°C (PLA), 350-400°C (PETG/ABS) | | Compatible Thermoplastics | PLA, PETG, ABS, PPS, PP | | Cost per use | 100 Pcs kit — ₹11.44 per insert | | Brand | FFVRVSS | | Product Type | Nut Insert | | Thread Size | M4x6x5.5mm | | Quantity | 100 Pcs | | Material | Lead-Free Brass | | Knurling Style | 45-Degree Spiral | | Color | Brass | | Item Shape | Round | | Finish Type | Brass | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | | Dimensions (Case) | 2.6 x 2.6 x 0.65 inches (approx. 6.6 x 6.6 x 1.65 cm) | ## Frequently asked questions ### What thread size and standard does this fitting nut use? This FFVRVSS kit contains M4x6x5.5mm threaded inserts, which are metric. The M4 designation refers to the internal thread size. Ensure this metric size matches the screw or bolt you intend to use for a secure connection. ### What material is this fitting nut made from? These fitting nuts are made from premium lead-free brass, chosen for its excellent thermal conductivity, corrosion resistance, and strength. This material ensures clean, precise threads that resist stripping and deformation for reliable, long-term use in plastic applications. ### How do I install these brass threaded inserts? Installation requires a soldering iron. Heat the 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 5mm) until flush, holding steady for 3-5 seconds while the plastic cools and locks it in place. ### Are these brass inserts suitable for all 3D printing plastics? Yes, these inserts are designed for universal compatibility with common thermoplastics including PLA, PETG, ABS, PPS, and PP. Their heat-set installation method works effectively across these materials, providing strong, reusable threads. ### What is the pull-out strength of these inserts? The 45-degree opposing spiral knurling on these inserts provides superior torque resistance and pull-out strength compared to straight-thread inserts. This design ensures they remain firmly seated in your 3D printed parts even under significant stress. ### Can I use these inserts for metal-to-metal connections? No, these threaded inserts are specifically designed for heat-setting into thermoplastics like PLA, PETG, and ABS. They create strong, reusable metal threads within plastic components, not for connecting metal parts directly. ### How do I choose the right size nut insert for my project? This kit provides the M4x6x5.5mm size, which is a popular choice for many 3D printing applications. For other projects, ensure you match the internal thread size (M4 in this case) to the screw or bolt you plan to use, and verify the outer diameter fits your pilot hole. ### What are the benefits of using brass threaded inserts over just screwing into plastic? Brass threaded inserts offer significantly stronger, more durable, and reusable threads compared to directly screwing into plastic. They prevent stripping, withstand higher torque, and resist wear from repeated assembly and disassembly, extending the life of your plastic components. ## 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/B0H1VFPMSD-2.webp 2. https://images.crowcrowcrow.com/B0H1VFPMSD-5.webp 3. https://images.crowcrowcrow.com/B0H1VFPMSD-8.webp 4. https://images.crowcrowcrow.com/B0H1VFPMSD-11.webp 5. https://images.crowcrowcrow.com/B0H1VFPMSD-14.webp 6. https://images.crowcrowcrow.com/B0H1VFPMSD-17.webp --- Source: https://crowcrowcrow.com/p/ffvrvss-100pcs-brass-threaded-inserts-kit-m4x6x5-5-heat-set-printing/qcm0801 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 6-8 days. Prices are all-inclusive (duties + GST).