Pack of 8 784-5581A (5/16-18) 5/8" Carriage Bolts Nuts kit fits MTD Shave Plate Scraper Bar 790-00120-0637 Snow blowers

What It Is

This is a pack of eight 5/16-18 carriage bolts with matching nuts, specifically sized for attaching the shave plate or scraper bar on MTD and compatible snow blowers. It replaces OEM part 784-5581A and fits models that use the 790-00120-0637 shave plate assembly.

Fitment & Compatibility

Before buying, confirm your snow blower uses 5/16-18 thread size bolts with a 5/8” grip length (the unthreaded portion under the head). This kit is designed for MTD, Troy-Bilt, Cub Cadet, Yard Machines, and similar brands using the 790-00120-0637 scraper bar. Check your owner’s manual or existing bolts: if they’re 5/16-18 with a 5/8” shoulder, these will work. Not compatible with smaller 1/4” hardware or metric threads. Measure the thickness of your shave plate plus any washers to ensure the 5/8” grip length is sufficient.

Key Things to Know

• Quality: Zinc-plated steel resists rust better than plain steel, but still inspect annually for corrosion in salt-heavy areas.
• Installation: Straightforward—remove old bolts, align shave plate, and tighten nuts. Use a wrench or socket; no special tools needed.
• Gotcha: The square neck under the carriage bolt head must seat into the square hole in the scraper bar to prevent spinning. If your bar has round holes, these bolts won’t lock properly.
• Quantity: Eight bolts cover most shave plates (usually 6–8 per unit). Extra bolts are useful for spares or other small hardware needs.

Should You Buy It

If you need to replace worn or missing bolts on your MTD-style snow blower shave plate, this kit is a cost-effective, direct-fit solution. It’s ideal for DIY maintenance and avoids buying a full OEM hardware set. Skip it if your machine uses metric threads or different bolt lengths.