1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 With Black Zinc Bake Finish Gritty Heavy-Duty Locknuts For Auto Machinery And DIY Projects High-Precision Durable Hardware Pack Of 50

1/4-20 Serrated Flange Hex Lock Nut, Black Zinc HR15N
✔️ 1/4-20 thread, serrated flange, case hardened HR15N, pack of 50

These 1/4-20 serrated flange hex lock nuts provide a secure locking solution for metal assemblies. Used in automotive, machinery, and DIY projects where vibration may cause fasteners to loosen.

✅ Thread: 1/4-20
✅ Style: Serrated flange hex lock nut
✅ Finish/Material: Case hardened HR15N, black zinc and bake
✅ Pack: 50 nuts
✅ Part number: 14NRBZ
✅ Origin: Taiwan, Province of China
✅ Package dimensions: 5 in L x 1 in H x 5 in W

💡 What is a lock nut used for and how does it prevent loosening under vibration?

Lock nuts are handy for keeping fasteners tight in moving parts. Quick, scannable points:

- They resist loosening from vibration by increasing friction and bite - Serrated flange helps anti-rotation against mating surfaces - Case hardened HR15N with black zinc finish boosts wear and corrosion resistance - Works with standard 1/4-20 bolts in metalworking and automotive projects