The Best Shear Pins for Husqvarna

When winter storms bury your driveway, a reliable two-stage snow blower is your best friend, but it’s only as dependable as its weakest mechanical link.

That link is often the shear pins, designed to break under excessive load to protect the auger gearbox from catastrophic damage. For Husqvarna owners, finding the right shear pins means balancing OEM exactness with cost-effective aftermarket options.

Our research-based guide evaluates the most popular OEM and compatible shear pin kits, comparing material spec, fitment, break-away consistency, and real-world feedback from verified buyers, so you can keep your machine running through the heaviest snowfalls.

Snow Removal Wiki’s team of researchers analyzed technical specifications, expert review consensus from small-engine repair forums, and hundreds of verified buyer experiences to score each product using our consistent 10-point SRW Score.

We prioritized shear pins that offer reliable break strength, corrosion resistance, and easy installation.

Whether you need a quick replacement for a Husqvarna 570XP or a bulk pack for a fleet, our curated list below highlights the best shear pins for Husqvarna snow blowers to suit your budget and machine model.

Best Shear Pins for Husqvarna Buying Guide

OEM vs. Aftermarket Compatibility

OEM shear pins from Husqvarna (part numbers 580790401, 588077501, or 532192090) are engineered to break at a precise load threshold to protect the gearbox and auger. Aftermarket alternatives often use similar dimensions but may vary in material hardness.

Some verified buyers report that cheaper generic pins can shear too easily or not break at all, risking drivetrain damage.

When choosing between OEM and compatible kits, check that the replacement matches your specific model, for example, the 570XP and 575XP share a common bolt pattern, while older machines may require a longer pin.

For more on selecting the right snow blower for your conditions, see our guide to snow blowers for mixed conditions.

Break Strength and Material Quality

Shear pins are typically made from mild steel with a controlled shear point. The strongest aftermarket kits use zinc-plated bolts that resist rust but still break cleanly under overload.

Avoid pins that are case-hardened or excessively hard, they may not shear as intended. Look for kits that include grade-5 bolts or specify a consistent shear strength across the batch.

Kits with nylon-insert lock nuts help maintain torque during vibration, a feature praised in many positive reviews. If you operate in heavy, wet snow, consider a snow blower designed for Vermont winters and match it with appropriately rated shear pins.

Quantity and Value Per Pin

Most owners find that having a spare set of shear pins on hand is critical during a storm. Kits range from 6-packs to 12-packs.

While buying in bulk lowers the per-pin cost, ensure the pack includes both bolts and lock nuts, some budget kits omit nuts.

Verified buyer feedback often highlights that packs with 6 bolts priced around the $10, $15 range offer the best balance of cost and quality. For heavy use, a 12-pack like the compatible kit for ST224 models can provide season-long coverage.

Before purchasing, verify your machine’s part number; many Husqvarna models share the 580790401 specification. For a broader look at snow blower maintenance, explore our ranked snow blower guide.

Fitment for Specific Husqvarna Models

Husqvarna two-stage snow blowers such as the 570XP, 575XP, 576XP, and the ST224 use shear pins with a 1/4-inch or 5/16-inch diameter, depending on the year. The length also varies, some pins are 2 1/8 inches, while others are shorter.

Always reference the OEM part number from your owner’s manual. Aftermarket kits labeled for “Husqvarna, Craftsman, Poulan” often cover multiple brands, but double-check that the package includes the correct shoulder length and nut size.

If you run a professional operation, a commercial snow blower may require heavy-duty shear pins not found in standard consumer kits.

Ease of Installation and Included Hardware

Swapping a shear pin is a straightforward task: remove the old broken bolt, align the auger holes, insert the new bolt, and torque the lock nut.

Kits that supply serrated flange nuts or nylon-insert lock nuts simplify the job and reduce the chance of loosening. Verified buyers frequently mention that kits with clear labeling or color-coded packaging speed up identification in the field.

If you often work on multiple machines, consider a universal kit that includes a variety of sizes. For more maintenance tips, check our snow blower for cabin use advice.

Weather and Corrosion Resistance

Shear pins are constantly exposed to moisture, road salt, and freezing temperatures. Zinc or yellow-chromate plating provides decent corrosion protection, but some aftermarket kits use black oxide coating, which may rust faster. OEM Husqvarna pins typically have a durable finish.

In coastal or high-salt areas, invest in stainless steel shear pins if available, though they must still be designed to shear at the correct load.

For overall machine protection, pairing good pins with a quality bulk ice melt can reduce stress on the auger.

Why You Should Trust Us

Snow Removal Wiki is an independent review resource, not a retailer.

We evaluate each product using a consistent 10-point SRW Score based on a synthesis of technical specifications, expert review consensus from small-engine repair specialists, verified buyer feedback from multiple major e‑commerce platforms, and published manufacturer data.

We do not conduct our own product trials; our evaluations are grounded in research, published data, expert review consensus, and verified buyer feedback.

Every product in this guide is scored against the same criteria, break strength reliability, fitment accuracy, hardware completeness, and long-term durability, to help you make an informed purchase.

Final Thoughts

• Best Overall: Husqvarna Shear Bolts & Nuts Kit (6 Pack) 580790401, This OEM-spec kit scores high (SRW Score 8.9) for its exact fit on 570XP, 575XP, 576XP models, reliable shear performance, and included lock nuts. Verified buyers consistently praise its break-away consistency.
• Best Budget Pick: Throwers Shear Pins Bolts & Nuts Kit (6 Pack), With an SRW Score of 9.1 and a very competitive price, this aftermarket kit offers excellent value for Husqvarna and Craftsman two-stage snow blowers, backed by positive reviews on durability.
• Best for Extended Operation: 8 Pack Snow Blower Shear Bolts Kit, Scoring 9.2 SRW, this kit provides eight bolts plus nuts, ideal for users who clear multiple properties and want to keep spares on hand. Buyers note the robust zinc plating resists rust well.

Frequently Asked Questions

How do I know which shear pin size my Husqvarna snow blower needs?

Check your owner’s manual for the OEM part number. For most Husqvarna two-stage models, common numbers are 580790401, 588077501, or 532192090. The pin diameter is typically 1/4 inch or 5/16 inch, and length around 2 1/8 inches.

If you have an older machine, measure the old pin before ordering. You can also search by your machine’s model number (e.g., ST224, 570XP) on the Amazon product page to confirm fitment.

Can I use a regular bolt instead of a shear pin?

No. Using a standard bolt that does not shear at the designed load can transfer excessive force to the auger gearbox, causing expensive damage. Always use purpose-built shear pins that match the manufacturer’s specified break strength.

For the same reason, avoid replacing a broken shear pin with a hardened bolt, it may never break, leading to gear failure.

Why do shear pins keep breaking on my snow blower?

Frequent shear pin breakage usually indicates an underlying issue: the auger is hitting hidden debris (rocks, ice chunks, frozen ruts), the scraper blade is too low, or the auger itself is bent.

Check the auger housing for damage and ensure the skid shoes are adjusted correctly. Using a lighter snow blower for elderly users may require more careful operation on uneven terrain to reduce pin stress.

Are aftermarket shear pins as good as OEM?

Many aftermarket kits match OEM dimensions and material properties, and they score well in verified buyer feedback. However, quality can vary between brands. Kits with consistent reviews and a high SRW Score (above 8.5) are generally reliable.

Always read recent buyer comments for your specific model. For critical use, such as in a snow blower chosen by women for ease of use, sticking with OEM may offer extra peace of mind.

How often should I replace shear pins?

Replace shear pins only when they break. Carry at least one spare set in your snow blower’s tool kit. At the start of each season, inspect pins for rust, bending, or cracks and replace if any appear.

If you break more than two pins in a single outing, stop and inspect the auger system for obstructions or damage. For advice on choosing the right machine for heavy use, see our snow blower for Michigan winters guide.

What is the difference between shear pins and shear bolts?

In practice, the terms are used interchangeably for Husqvarna snow blowers. Both refer to bolts designed to break under a specific load to protect the drivetrain.

Some kits label the hardware as “shear pins” and others as “shear bolts”, the function is identical. The important factor is correct dimensions and break strength, not the name.

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