781567 – Hustler Nylock Nut ½‑13 (Grade 5) — Genuine OEM

✅ Basic Info & Specifications

• Part Number: 781567

• Type: Nylock (nylon-insert) locking nut

• Thread Size: ½"-13 UNC (coarse thread)

• Grade: Grade 5 (medium strength, zinc-plated steel)

• Locking Feature: Nylon insert resists loosening from vibration and movement

🔍 Use & Application

This OEM locking nut is used throughout Hustler mower assemblies, commonly found in:

• Anti-scalp deck wheel mounting

• Caster or front wheel pivots

• Idler pulley brackets

• Structural and suspension components

• Anywhere vibration-resistance is critical

It’s engineered to maintain secure fastening in high-vibration applications found in ride-on and zero-turn mowers.

⭐ Features & Benefits

• ✅ OEM Specification Fit – Exact replacement for original part

• ✅ Vibration-Resistant – Nylon insert helps prevent hardware loosening

• ✅ Durable & Strong – Grade 5 rating supports medium-duty structural loads

• ✅ Multi-Use – Suitable for deck, frame, or accessory mounting

• ✅ Quick Replacement – Ideal for preventative maintenance or lost hardware

⚠️ Installation Tips

• Do not overtighten — follow torque specs for ½"-13 fasteners

• Always use a new nylock nut if the nylon insert is damaged or worn

• Use with compatible bolts or threaded shafts

• Retighten after first few hours of use to ensure retention under vibration

• Never reuse a nylock nut multiple times — replace for best performance

📦 What’s Included

• 1 × Hustler Nylock Nut (Part No. 781567)