4 Pack 90105-960-710 Mower Blade Hex Bolts Compatible with Honda 21" Lawn Mower HR214, HRA214, HR215, HRA215, HR216, HRA216, HRC215, HRC216, HRM215, HRB215 and HRS21

What It Is

This is a 4-pack of OEM Honda hex bolts (part 90105-960-710) used to secure the blade to the crankshaft on select Honda 21" walk-behind mowers. Designed for blade replacement on commercial and residential Honda mowers with a specific 21-inch deck.

Fitment & Compatibility

Before buying, confirm your mower model is one of these: HR214, HRA214, HR215, HRA215, HR216, HRA216, HRC215, HRC216, HRM215, HRB215, or HRS21. These bolts are not universal—they only fit Honda 21" models with a hex-head blade bolt design. Measure the bolt’s thread size (typically M8 x 1.25 on these models) and length (~20–22mm). OEM part number is 90105-960-710; aftermarket equivalents may differ in thread pitch or head shape. Check your mower’s manual or existing bolt to verify. These bolts are for the blade attachment only, not for deck or wheel hardware.

Key Things to Know

• Low rating alert: This product has a 1.0/5 rating from a single review, likely due to fitment issues or poor quality control. Verify the bolt matches your mower’s thread and length exactly.
• Installation: Use a torque wrench to tighten to 30–40 ft-lbs (check your manual). Over-tightening can strip threads; under-tightening risks blade detachment.
• Common gotcha: Some Honda models use a different bolt (e.g., flanged or with a different head shape). If your mower has a star or Torx head, this hex bolt won’t work.
• Replacement interval: Replace bolts every 2–3 blade changes or if threads are worn/cross-threaded. Never reuse a damaged bolt.

Should You Buy It

If you own a compatible Honda 21" mower and need a direct OEM replacement for the blade bolt, this 4-pack is a cost-effective way to have spares. However, given the poor rating, double-check your mower’s exact bolt specs and consider buying from a Honda dealer or a more-reviewed seller to avoid fitment hassle. Not for non-Honda mowers or different bolt designs.