1.75mm Filament 3D Printer Extruder Nozzles, MK8 MK10 Brass / Stainless / Hardened Steel Hot End NozzlesIntroductionThis complete series of 3D printer hotend nozzles is designed for 1.75mm diameter printing filament, compatible with mainstream MK8 and MK10 hotend heating blocks. Multiple material versions are offered: brass, stainless steel, nickel-plated steel and hardened steel, with M6 / M7 standard external thread for direct screw-in installation on extruder heat blocks. A full lineup of orifice sizes ranges from 0.2mm up to 1.2mm to satisfy different printing demands, from ultra-fine detailed miniature models to fast large-volume thick-layer printing. Each nozzle undergoes precision CNC machining to deliver ultra-smooth inner bore surfaces without burrs, drastically reducing filament friction and frequent nozzle clogging. Different metal materials carry distinct thermal resistance, hardness and heat conduction properties to match various printing filaments, including soft flexible TPU and abrasive carbon-fiber nylon, high-temperature engineering plastics and standard PLA/ABS consumables. The tight thread fit eliminates melted filament leakage at the joint, and universal thread specifications make these nozzles highly interchangeable across most consumer and industrial FDM 3D printer equipment.Specifications

• Product Name: 1.75mm Filament 3D Printer Extruder Hotend Nozzle
• Compatible Hotend Model: MK8, MK10
• Available Materials: Brass, stainless steel, nickel-plated steel, hardened steel
• Appearance Colors: Golden brass, silver stainless steel, black hardened steel
• Thread Standard: M6 or M7 external thread
• Matching Filament Diameter: 1.75 mm
• Available Nozzle Orifice Sizes:0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm

Brass Nozzle Core Parameters

1. Mohs Hardness: 3.0
2. Max Continuous Printing Temperature: 300℃
3. Thermal Conductivity: 105 W/m·K
4. Thermal Expansion Coefficient: 18.0 μm/m·℃

Stainless Steel Nozzle Core Parameters

1. Mohs Hardness: 5.0
2. Max Continuous Printing Temperature: 350℃
3. Thermal Conductivity: 16 W/m·K
4. Thermal Expansion Coefficient: 6.0 μm/m·℃

Hardened Steel Nozzle Core Parameters

1. Mohs Hardness: 7.8
2. Max Continuous Printing Temperature: 500℃ ~ 650℃
3. Thermal Conductivity: 22 W/m·K
4. Thermal Expansion Coefficient: 18.0 μm/m·℃

Product Features

1. Precision polished smooth inner bore to avoid filament cloggingEvery nozzle inner channel is finely polished to remove machining burrs, with low viscosity friction coefficient. The round smooth outlet hole minimizes extrusion resistance for all filament types, delivering steady uniform material output, reducing under-extrusion, stringing and frequent nozzle blockage issues during long printing jobs.
2. Three material grades for differentiated printing scenarios

• Brass nozzles feature outstanding thermal conductivity, rapidly transferring heat to melt filament evenly; ideal for low-temperature non-abrasive filaments such as PLA, PETG, TPU and ABS.
• Stainless steel nozzles balance moderate hardness and mid-range heat resistance, resisting minor abrasion from filled filaments and supporting printing up to 350℃ for ASA, PC and reinforced plastics.
• Hardened steel nozzles own ultra-high Mohs hardness and extreme high-temperature tolerance, perfectly suited for abrasive carbon fiber nylon, glass-filled plastics and high-temperature engineering resins up to 650℃.

3. Precision thread structure with tight leak-proof connectionStandard M6/M7 external threads are uniformly machined with consistent pitch. When screwed into heating blocks, the contact surface fits tightly to stop molten plastic leaking from the joint gap, preventing filament oozing and messy print surface defects.
4. Wide universal compatibility with mainstream hotend assembliesThe MK8 / MK10 standard form factor fits nearly all desktop FDM 3D printer heating blocks. Users can freely swap different orifice sizes and material nozzles without modifying extruder hardware, supporting flexible switching between fine detail and high-speed mass printing.
5. Stable thermal expansion performance to maintain dimensional accuracyControlled thermal expansion coefficients reduce nozzle deformation under sustained high heat, keeping the outlet aperture size consistent throughout long print runs, which preserves stable printing dimensional precision without layer shifting or inconsistent line width.

Application FieldsHobby Desktop FDM 3D Printing (Main Application)Perfect for consumer home 3D printers used for model making, miniature figurines, architectural prototypes and daily decorative parts. Brass nozzles are the standard choice for common PLA, PETG and TPU hobby filaments, delivering smooth surface finishes with low noise feeding.Engineering & Industrial Prototype PrintingStainless steel and hardened steel variants serve workshop prototyping equipment for printing high-strength functional parts. Compatible with high-temperature, abrasive engineering materials including carbon fiber nylon, glass-filled PP, PC, ASA and PA, resisting rapid wear from reinforced filaments.Specialized High-Temperature 3D PrintingHardened steel nozzles support extreme-temperature printing processes up to 650℃ for advanced industrial resins, PEEK and other heat-resistant polymers that cannot be processed with brass or standard stainless steel nozzles.Educational Laboratory & School Teaching EquipmentAll nozzle sizes and material options are widely adopted for university and maker lab 3D printing equipment, enabling students to test different filament materials, layer heights and printing precision by swapping 0.2mm fine detail nozzles up to 1.2mm fast-print large orifice nozzles.Custom DIY 3D Printer Modification & UpgradesA core replacement upgrade component for hobbyists modifying custom-built FDM machines, offering multiple thread and orifice options to optimize extrusion performance, eliminate clogging and extend nozzle service life for heavy daily printing workloads.Supporting Filament TypesPLA, ABS, TPU, PA, PP, PC, ASA, Nylon, PETG, PVA, HIPS, carbon fiber-filled filaments, glass-filled engineering plastics and high-temperature special resins.-Exact dimensions can also be viewed in the photo gallery. -You can find more products in different material, type, color, sizes, quantity and shapes in our shop If you have special needs, please contact us, we can customize according to your needs! Note:- Please allow minor errors due to manual measurement. Thank you for your comprehension.- Monitors are not calibrated, the element color shown in the photos may differ slightly from the real object. Please take the real one as standard.Package included :( According to your choice )