50PCS M3 Square Nuts, 304 Stainless Steel Metric Fasteners

This 50‑piece pack of M3 square nuts is precision made from 304 stainless steel, offering rust resistance for indoor and outdoor use. The square profile prevents spinning when embedded in wood, plastic, or 3D printed slots – no glue needed.Material304 stainless steel resists humidity, condensation, and light rain. Slightly magnetic due to cold forming – normal for this grade and harmless in most applications.Key Applications3D Printers: Embed into printed parts for mounting hotends, heater blocks, and filament guides.Drones & RC: Secure flight controllers, motor mounts, and battery straps inside frames.Electronics: Create threaded inserts for PCB standoffs, terminal blocks, and lid screws.Eyeglass Repair: Replace lost hinge screws – the nut fits snugly into plastic frames.Outdoor Camera Rigs: Attach plates and mounts on weather‑exposed gear.InstallationCut a square hole slightly smaller than the nut’s outer dimension (approx 5.5mm). Press in with a vise or hammer – the sharp corners bite into the material, locking the nut when you tighten the bolt. No special tools required.Who It’s ForHobbyists, repair technicians, and prototyping engineers. The compartment box keeps all 50 nuts organized – no extra storage needed. Works with any M3 machine screw (0.5mm pitch, coarse thread).

• Square nut - These square nuts withstand humidity, rain, and condensation. Easy to use without extra tools and glue. 304 stainless steel square nuts can be used in wood, plastic, steel or 3D printed slots. Comes with a packaging box to keep everything organized
• High quality material - This m3 square nut is crafted from 304 stainless steel, offering excellent corrosion resistance and strength. Stainless steel material with micro magnet
• Easy to install - The square shape prevents spinning when inserted into wood, plastic, or 3D printed slots – simply press into a square hole and tighten the bolt. The m3 square nut works perfectly for embedment in DIY projects
• Applicable people - Perfect for hobbyists, repair technicians, and engineers
• Application scenarios - M3 Square Nuts: Ideal for precision electronics and small devices — 3D printer hotends, drone frames, electronic enclosures, eyeglass repair, drone arms, outdoor camera rigs