Nylon Insert Flange Lock Nut 3/8-16 with Zinc Yellow Finish for Spartan Mowers SKU: 104-8301X2

Loose hardware creates serious problems on mowing equipment—bolts back out during operation, critical connections fail, and safety hazards develop when deck assemblies or linkages separate under load. This genuine Spartan nylon insert flange lock nut stops vibration-induced loosening cold, keeping your mower's critical fasteners secure where standard nuts would fail.

Why Genuine Spartan Hardware Matters

• Engineered zinc yellow coating provides superior corrosion resistance compared to standard zinc plating
• Nylon collar insert deforms elastically over threads, creating friction that locks the nut against backing out
• Built-in flange distributes clamping load evenly, preventing stress concentration and joint loosening
• Self-locking design maintains consistent torque while allowing removal when maintenance is needed

This vibration-resistant fastener is particularly valuable for mower deck assemblies during cutting operations and loader arm connections during material handling. When standard nuts won't stay tight, this is the solution that works. S&H Parts has been solving fastener problems for over 55 years.