Heavy Duty 5/16 Inch Hex Serrated Flange Lock Nuts With Black Oxide Coating Built Tough As Nails Using Grade 304 Stainless Steel 18 8 For Zero Hassle Installation And Bulletproof Grip In A 25 Piece Pack

Corrosion Resistant Serrated Flange Lock Nuts Set
✔️ 5/16 In Bore 18 Tpi Thread Coarse Pitch 25 Piece Box

These hex serrated flange lock nuts combine standard nut threading with an integrated circular washer that bites into metal and wood surfaces to stop spinning during torque. They deliver reliable vibration resistance for automotive chassis work, marine railings, wooden decking screws, and equipment frames that face constant movement or moisture exposure.

✅ 18-8 Grade 304 Stainless Steel Body ✅ Black Oxide Exterior Coating ✅ 5/16 Inch Clear Bore Dimension ✅ 18 Threads Per Inch Coarse Cut ✅ Integrated Non Spin Serrated Flange

💡 What is the best way to prevent lock nuts from backing off on vibrating truck beds?

Standard hex nuts often slip loose on shaky trailers, making these handy replacement studs a straightforward fix for bolted assemblies that take beatings. The bottom ring features sharpened cutting teeth that press into aluminum or wood rather than spinning, which keeps your builds tight without grabbing extra locks.

- Blocks rotation while impact guns torque the bolt head - Stays locked through summer heat and winter snow melt - Cleans up messy frame repairs without stripped mounting holes - Fits standard imperial drive tools readily ✝️