63607 Rotary Cutter Blade Bolt Kit Replacement for Bush Hog Rotary Cutter Blade, 4 Bolts with Nuts & Lock Washers, Replaces 63607, 7919, 252BH, 20322 (4 Packs)

What It Is

This is a replacement bolt kit for Bush Hog rotary cutter blades, designed to secure the blade to the spindle on medium-duty rotary cutters. It includes four bolts, nuts, and lock washers, making it a direct drop-in for worn or lost hardware on Bush Hog and compatible models.

Fitment & Compatibility

Before buying, check your cutter’s blade bolt size and thread pitch. This kit replaces OEM part numbers 63607, 7919, 252BH, and 20322, and fits many Bush Hog rotary cutters (e.g., 286, 296, 300, 3210, 3212 series). Measure your existing bolt: it should be 5/8” diameter, 2” long, with 11 threads per inch (UNC). Confirm your deck’s blade retention uses a bolt (not a pin or clip). This is an aftermarket kit, not genuine Bush Hog, so check tolerance if you have a tight spindle bore.

Key Things to Know

• Grade matters: Bolts are typically Grade 5 (not Grade 8). For heavy commercial use or high-impact conditions, consider upgrading to a stronger bolt.
• Installation torque: Tighten to 90–110 ft-lbs (check your manual). Use a torque wrench to prevent loosening or stripping. Lock washers help, but add thread locker (blue Loctite) for extra security.
• Common gotcha: The included lock washers may be thicker than OEM. If the bolt doesn’t seat flush, swap for thinner washers or use a flat washer under the lock washer.
• Pack size: You get four complete sets—enough for most single-spindle cutters. If you have a twin-spindle (e.g., 3212), you’ll need two kits.

Should You Buy It

Buy this if you need a quick, affordable replacement for worn or missing blade bolts on a Bush Hog rotary cutter and don’t require OEM branding. It’s ideal for light to medium-duty use, but skip it for heavy commercial or forestry work where Grade 8 hardware is safer.