Galloparts Blade Adapter for Husqvarna Walk-Behind Mowers 421782 — Heavy‑Duty Metal, Machined Fit

Galloparts 421782 blade adapter is a heavy‑duty replacement hub that secures the mower blade to a range of Husqvarna walk‑behind models, restoring safe, reliable blade mounting.

If your Husqvarna walk‑behind mower shows wobble, blade slippage, or you need to replace a worn adapter, this Galloparts 421782 unit offers a durable aftermarket solution. Made from high‑grade metal, it’s engineered to match the fit and mounting pattern of multiple Husqvarna part numbers so you can get back to cutting with correct blade alignment and secure fastening.

Which Husqvarna models and part numbers does this adapter fit?

This adapter is compatible with many Husqvarna walk‑behind models and several OEM reference numbers. Confirm compatibility by comparing your mower’s part number to the list below or checking the old adapter on your deck.

• Fits models: HU725FH, HU725F, HU700F, HU675FE, LB 155S, 7022F and equivalent walk‑behind variants.
• Replaces part numbers: 421782, 581473301, 532421782 and related OEM references.
• Matches multiple Husqvarna OEM codes such as 96145000901/902/904/905, 96145001201/202, 96145001301/302, 96143009302/10501, 96121002701.

How durable and precise is the Galloparts replacement adapter?

The adapter is manufactured from high‑grade metal designed for repetitive, high‑stress rotation under a mower deck. It restores the proper blade centering and secures the blade bolt to reduce vibration and wear on the spindle.

• High‑grade metal construction for longer service life.
• Machined mounting surface to maintain correct blade runout.
• Corrosion‑resistant finish to withstand outdoor storage and use.

What’s included and what should I check before installation?

Each package contains one Galloparts 421782 blade adapter ready to swap into your mower deck. Before installing, inspect the spindle, washer, and blade bolt for wear—replacing those parts as needed ensures a safe, secure installation.

• Included: Blade Adapter x 1.
• Verify that bolt hole pattern and center bore match your spindle and blade.
• Check spindle bearings and mounting hardware; tighten to manufacturer torque specs.

Will this aftermarket adapter perform like the original?

This is an aftermarket replacement (not OEM). When matched correctly to the mower model and installed properly, it restores blade mounting function and offers reliable performance for regular mowing tasks.

• Not an original Husqvarna part, but engineered for compatible fit.
• Intended as a direct replacement to restore blade alignment and security.
• Works best when paired with good condition blade bolts and a solid spindle assembly.

Who is this for: The Galloparts 421782 blade adapter suits homeowners, lawn care DIYers, and small landscaping pros who need an affordable, robust replacement adapter for select Husqvarna walk‑behind mowers. If you own any listed model and experience blade wobble, unusual vibration, or have a damaged adapter, this part lets you restore proper blade mounting without buying a full deck or new spindle assembly.