Key takeaways
- Pro: 800 pieces at $25.99 works out to well under four cents each, a strong per-unit value for bulk insulation jobs.
- Pro: Plastic construction eliminates the thermal bridging problem that metal washers introduce when fastening foam board.
- Con: Only one size is offered, so you will need a separate pack if your fasteners vary in diameter.
When you are stocking hardware washers for insulation projects, mechanical assemblies, or commercial glass cleaning, the price range under $800 covers a surprising spread of materials, quantities, and size options. The challenge is not finding a pack of washers — it is finding the right pack for the job without overpaying for corrosion resistance you do not need, or underbuying on quantity and paying more per unit on the next trip to the supply house.
The best washers under 800 for your specific application depend on what you are fastening, the environment they will sit in, and how many sizes you need on hand. A polypropylene washer for foam board insulation and an 18-8 stainless split lock washer for structural connections serve completely different purposes, yet both compete for the same search intent. This roundup compares published specs, list prices, and recurring themes in owner feedback so you can shortlist the right product without guessing.
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Quick Picks
| Product | Best for | Price |
|---|---|---|
| Taiyin 800 Pcs 45 mm Plastic Washers | Foam board insulation projects | $25.99 |
| Favordrory M8 304 Stainless Flat Washer | Corrosion-resistant M8 bolt assemblies | $14.99 |
| 800 Pcs 46 mm White Plastic Washers | Rigid foam panel fastening | $22.99 |
| HELIFOUNER 800 Pcs Nylon Flat Washers | Multi-size indoor light-duty fastening | $9.98 |
| Kindroufly 800 Pcs Black Zinc 7 Sizes | General-purpose steel fender washer kit | $12.99 |
| Kindroufly 800 Pcs Black Zinc 9 Sizes | Wider size range in a single steel kit | $9.99 |
| 5/8″ Split Lock Washers 18-8 Stainless | Structural stainless steel connections | $762.99 |
| Commercial Glass Washer 5-Brush | Bar and café glass cleaning at volume | $238.90 |
How We Picked
We narrowed the field by comparing material grade against published corrosion ratings, evaluating cost per piece relative to pack quantity, checking whether size assortments cover the common fastener diameters used in insulation and light mechanical work, and scanning owner reviews for recurring complaints about dimensional accuracy, coating quality, or packaging damage on arrival. A product had to clear at least three of these four gates to make the list.
The 8 Best Washers Under 800 in 2026
Taiyin 800 Pcs 1.77 Inch/ 45 mm Plastic Washers
This pack is built for insulation contractors and DIY renovators fastening rigid foam board to exterior or interior walls. The 45 mm diameter provides adequate load spreading over the foam surface without cracking it. Owners appreciate the generous quantity and the fact that the polypropylene does not rust in wet conditions.
- Pro: 800 pieces at $25.99 works out to well under four cents each, a strong per-unit value for bulk insulation jobs.
- Pro: Plastic construction eliminates the thermal bridging problem that metal washers introduce when fastening foam board.
- Con: Only one size is offered, so you will need a separate pack if your fasteners vary in diameter.
Skip this if your project uses screws smaller than roughly 1.77 inches in head clearance, or if you need metal-grade structural holding power.
Favordrory M8 Flat Washer, 304 Stainless Steel
Targeted at anyone assembling or repairing M8 bolt connections where rust is a real concern — outdoor fixtures, marine-adjacent hardware, or food-processing environments. The 24 mm outer diameter gives a moderate bearing surface on the nut face. Thirty-four cents per piece is a fair stainless price.
- Pro: 304 grade stainless resists general atmospheric corrosion far better than zinc-plated or plain steel alternatives.
- Pro: Consistent dimensional tolerances praised across multiple owner reviews, meaning bolts seat cleanly without play.
- Con: 100 pieces is a modest pack; large assemblies will require multiple orders, raising shipping cost per unit.
Skip this if you need a variety of sizes or if your budget does not justify stainless for an indoor, dry application.
800 Pcs 46 mm White Plastic Washer for Foam Board
Nearly identical in purpose to the Taiyin option but at a slightly lower list price and with a 46 mm diameter, which shaves a fraction of a millimeter off the load-bearing footprint. The white color makes it easy to verify coverage during installation and to spot missed fasteners during inspection.
- Pro: Lower per-unit cost than the Taiyin equivalent while maintaining the same 800-piece quantity.
- Pro: Polypropylene is chemically inert against most foam board adhesives and sealants used in the same assembly.
- Con: Single-size design again means no flexibility for mixed fastener diameters on the same job.
Skip this if you require any traceability documentation for a commercial or government insulation contract.
HELIFOUNER 800 Pieces 9 Sizes Black Nylon Flat Washers
A well-rounded assortment for electronics enclosures, light mechanical assemblies, and situations where non-conductive and non-marring properties matter. The nine-size range from M2 through M12 covers the bulk of fastener sizes found in consumer product repair and hobby machining.
- Pro: Broadest size coverage of any nylon option here, reducing the chance you run out mid-project.
- Pro: At under a penny per piece, this is the cheapest pack in the entire roundup.
- Con: Nylon is not rubber — it lacks the elasticity for vibration-resistant applications and will creep under sustained load.
Skip this if your assembly is subject to high heat, heavy vibration, or chemical exposure beyond mild household solvents.
Kindroufly 800 Pieces Black Zinc Plated Steel 7 Sizes
The go-to choice for general workshop and automotive tasks where moderate corrosion resistance and high shear strength are both needed. The fender washer profile provides a larger outer diameter than standard flat washers, spreading load on softer materials like sheet metal and wood.
- Pro: Zinc plating offers a reasonable barrier against surface rust without the stainless premium.
- Pro: Seven sizes from M3 to M12 cover the most common bolt diameters in automotive and fencing work.
- Con: The 12.99 price for 800 pieces is higher per-unit than the nine-size Kindroufly variant below.
Skip this if you need sizes below M3 or above M12, or if the environment is consistently wet or salt-exposed.
Kindroufly 800 Pieces Black Zinc Plated Steel 9 Sizes
Same manufacturer, same material, same total count, but with two added small sizes (M2 and M2.5) and a lower price. This is one of the rare cases where the expanded assortment costs less, likely due to a promotional listing strategy that makes it the value leader among steel kits.
- Pro: Nine sizes at $9.99 delivers a per-piece cost competitive with the cheapest nylon kit in this group.
- Pro: The addition of M2 and M2.5 makes it suitable for electronics housings and small appliance repairs alongside heavier jobs.
- Con: The black zinc coating will chip under aggressive tightening torque, exposing raw steel to oxidation.
Skip this if you need a documented salt-spray rating above 48 hours or if your fasteners are all M6 and larger.
5/8 Inch Split Lock Washers 18-8 Stainless 800 Pack
At $762.99 this is the most expensive item in the roundup and the only one with a true structural application. The 18-8 stainless designation (equivalent to 304 grade) combined with the split-lock design provides both corrosion resistance and a spring force that resists nut rotation under vibration. This is a specification-grade component for mechanical engineers and fleet maintenance teams.
- Pro: The 800-pack quantity at 5/8 inch size is unusual; most suppliers cap at 100 or 200, making this a bulk procurement advantage.
- Pro: Split-lock geometry maintains tension through thermal cycling, a property flat washers cannot replicate.
- Con: Nearly $1 per piece means this is out of reach for casual DIY use where cheaper alternatives suffice.
Skip this if your bolt size is not exactly 5/8 inch or if you are not in an application that specifies 18-8 stainless by name.
Commercial Glass Washer 5-Brush Electric Cup Washer
The outlier in this category — a powered unit rated at 240 RPM capable of cleaning approximately 800 cups per hour across diameters from 1.89 to 3.94 inches. This is not a hardware washer but a commercial cleaning device for bars, cafés, and restaurant back-of-house operations.
- Pro: Five brush heads handle a wide range of glassware shapes, reducing hand-washing labor significantly during peak service.
- Pro: The 800-cups-per-hour throughput means a busy bar can clear a full rack of stemware in under ten minutes.
- Con: At $238.90 it is a capital purchase, not a consumable, and requires a dedicated water supply line and drain connection.
Skip this if your operation handles fewer than a few dozen glasses per shift or if you lack the space for a countertop unit with plumbing access.
Buying Guide
Material Selection: Stainless vs. Zinc vs. Nylon vs. Polypropylene
Match the material to the environment, not just the bolt. Polypropylene is ideal where electrical insulation or thermal bridging is a concern. Nylon handles light loads indoors and is non-conductive. Black zinc steel offers the best strength-to-cost ratio for dry or semi-protected applications. 304 and 18-8 stainless become necessary when the part will see moisture, salt air, or food contact. The per-piece price difference between zinc and stainless can be five to ten times, so confirm your service environment before paying the premium.
Size Coverage and Assortment Practicality
Single-size packs like the Taiyin and Favordrory options are cheapest per piece but force you to buy multiple SKUs for varied jobs. Assortment kits covering M2 through M12, like the Kindroufly nine-size pack, reduce inventory overhead for shops that handle mixed repairs. A useful rule: if your projects use more than three bolt diameters, an assortment usually saves money on repeated small orders versus a single large batch of one size.
Cost-per-Piece and Pack Quantity Thresholds
Divide the list price by the piece count before comparing products. A $9.98 pack of 800 nylon washers at 1.2 cents each is fundamentally different value than a $762.99 pack of 800 stainless lock washers at 95 cents each. For consumable fasteners, aim for the lowest per-piece cost that meets your material spec. For capital equipment like the glass washer, evaluate total throughput and labor savings instead, since the unit cost comparison to hand washing will be the real driver.
Our Verdict
The top pick for most hardware washers under 800 budget is the Kindroufly 800 Pieces Black Zinc 9 Sizes kit. It offers the widest size range among steel options, the lowest price among multi-size steel packs, and enough quantity for a small shop or active DIY project to run weeks without restocking. For a budget pick, the HELIFOUNER nylon assortment at $9.98 delivers the same size breadth in a non-conductive material at a price that is effectively negligible. The condition under which another product clearly wins: if your application is 5/8-inch structural stainless with vibration, the 18-8 split lock washer pack is the only item here that will hold torque over time, and nothing cheaper in this list substitutes for it.
FAQ
What does “under 800” mean in the target keyword?
In this context it refers to a dollar budget cap of $800. Every product on this list is priced well below that threshold, from under ten dollars to just over $760.
Can I use plastic washers outdoors in a storm-exposed environment?
Polypropylene is UV-stabilized in many formulations and will not corrode, but prolonged sun exposure can make it brittle over several seasons. For long-term exterior use, stainless steel or properly coated metal is more durable.
Is a split lock washer always better than a flat washer?
No. Split lock washers resist rotational loosening under vibration but are poor at distributing concentrated loads. If you need to protect a soft surface or spread bearing pressure, a flat or fender washer is the correct choice.
What size glass is compatible with the commercial washer?
The unit handles glassware with diameters between 1.89 and 3.94 inches, which covers most wine glasses, pint mugs, and tumblers found in a standard bar setup.
