July 30, 2026
Lawn Mower Blade Bolt Size & When to Replace After a Break
Searching “mower blade bolt,” “lawnmower bolts,” or “lawnmower blade bolt size”? Match the OEM fastener — and replace it after a blade strike or rounded head.
“Mower blade bolt,” “lawnmower bolts,” and “lawn mower bolts” searches spike whenever someone pulls a blade and finds a rounded hex or stretched threads. There is no single universal size — thread pitch, shoulder length, and washer stack are model-specific. On many Toro and Lawn-Boy decks, the current OEM fastener is 145-5695 (replaces older 117-5270 / 112-8789).
Lawnmower blade bolt size tips: measure or match the old bolt before buying hardware-store “close” fasteners. Wrong length can bottom out or leave the blade loose; wrong thread damages the spindle.
After a broken lawn mower blade or rock strike, assume the bolt took impact. Replace the bolt with the blade — a compromised fastener is a thrown-blade risk.
Torque to the manufacturer’s spec with a hand wrench or torque wrench. Impact guns make it easy to overshoot and stretch a brand-new bolt.
Order the genuine Toro 145-5695 blade bolt from BUY4LOW when you’re refreshing blades or recovering from a deck strike — Amazon fulfilment for fast turnaround.