30Pcs Square UNC Carbon Steel Weld Nuts, 3 Sizes SAE Square Base Anti-Tilt

30Pcs Square UNC Carbon Steel Weld Nuts - 3 Most Popular SAE UNC SizesComplete 30-piece Set：10 pcs – 1/4""-20 UNC (Width: 0.38"" / 9.8mm, Height: 0.20"" / 5.2mm, Weld Projection Height: 0.02"" / 0.5mm)10 pcs – 5/16""-18 UNC (Width: 0.47"" / 12mm, Height: 0.23"" / 5.8mm, Weld Projection Height: 0.03"" / 0.9mm)10 pcs – 3/8""-16 UNC (Width: 0.55"" / 13.9mm, Height: 0.25"" / 6.5mm, Weld Projection Height: 0.04"" / 1mm)Each size is individually bagged for easy identification and inventory management.Built for Professionals：Weld nuts made from industrial-grade carbon steel with a plain, lightly oiled finish. Each nut features precision-rolled UNC coarse threads that are clean, burr-free, and ready to weld right out of the box.The Square Body Advantage：Square body design stays put. Precise positioning means every weld lands exactly where you need it. High torque resistance means your connection stays solid under stress – no loosening, no failure.4 Projections for a Stronger Weld：Each nut has 4 symmetrical welding projections that concentrate heat for fast, even fusion to your metal workpiece. The result? A stronger, more reliable weld compared to standard nuts.⚠️ IMPORTANT: SAE Standard ONLYThese UNC weld nuts are designed for SAE (US standard) UNC bolts. They are NOT compatible with metric M6, M8, or M10 bolts. Please verify your bolt thread type before ordering.

• 【COMPLETE 3-SIZE SAE WELD NUTS SET】This 30-piece kit gives you 10 pcs each of the 3 most popular SAE UNC sizes: 1/4"-20 UNC, 5/16"-18 UNC, and 3/8"-16 UNC. one set covers most auto repair and sheet metal welding jobs.
• 【4-PROJECTION WELDING DESIGN 】Each square weld nut features 4 symmetrical welding projections that concentrate current for fast, reliable resistance welding. The square base ensures precise positioning, no rolling, no tilting, high torque resistance even under vibration.
• 【CLEAN UNC THREADS WELD NUTS】Precision rolled UNC weld nuts coarse threads are burr-free and fully formed. Lightly oiled for rust protection, smooth bolt entry every time, no chasing taps required. Made from industrial-grade carbon steel with plain finish.
• 【SQUARE BODY ANTI-TILT DESIGN】The square body stays flat on your work surface. No shifting during welding, just a solid, permanent threaded connection every time.
• 【VERSATILE APPLICATIONS】Square UNC carbon steel weld nuts is ideal for auto body & chassis, electrical enclosures, HVAC, sheet metal fabrication, heavy equipment, and furniture manufacturing. Suitable for mechanics, fabricators, and maintenance pros for resistance welding on steel plates.