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Washers

Explore durable washers including SAE flat, fender, and stainless steel varieties for secure fastening in industrial, automotive, and DIY projects.

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Lordhardware 200 Pack 10# SAE Flat Washers 1/2" OD 304 Stainless Steel - Corrosion Resistant Metal Washers for Automotive & DIY

These SAE standard 10# flat washers with 1/2'' OD come in a 200-pack of 304 stainless steel for superior corrosion, rust, and oxidation resistance. Buy them for reliable performance in household electrical, automotive, and hydraulic projects.

  • Unmatched corrosion resistance thrives in high-heat, cold, or wet environments for years of reliable use
  • Rust and oxidation proof to protect connections in automotive, electrical, and hydraulic applications
  • SAE standard 10# sizing with 1/2'' OD ensures precise, secure fits every time
  • Bulk 200-pack delivers exceptional value for DIYers, mechanics, and professionals
  • Versatile for home appliances, car garages, fuel lines, and more

Premium 304 stainless steel build for top-tier durability and longevity. Excellent resistance to corrosion, rust, and extreme temperatures. Generous 200-piece pack suits large projects and frequent use.

Exhibits weak magnetic properties typical of 304 stainless steel. Specific 10# size limits use in non-standard applications. May require tools for installation in tight spaces.

ARP 2008539 10-Pack Premium Chrome Moly Washers - 7/16" ID Chamfered, 13/16" OD, .120" Thick for Race Engines

ARP 2008539 provides a 10-pack of parallel-ground, hardened chrome moly washers with 7/16" chamfered ID, 13/16" OD, and .120" thickness. Perfect for engine builders and racers stocking reliable hardware to avoid fastener failures.

  • Superior chrome moly build delivers unmatched strength for high-stress engine applications
  • Parallel-ground and hardened surfaces ensure precise, reliable fastening every time
  • Black oxide finish resists corrosion for long-lasting performance in harsh environments
  • Chamfered 7/16" inner diameter prevents edge damage and eases installation
  • Exact 13/16" OD and .120" thickness fit demanding OEM and custom race setups

Premium materials outperform standard washers in racing conditions. Hardened construction enhances durability and load-bearing capacity. Chamfered edges simplify assembly and reduce bolt stress.

Specific dimensions limit use to compatible 7/16" bolt applications. Premium quality may exceed needs for casual or low-performance projects.

Kuprowin 5/8" Black Stainless Steel Flat Washers 1-5/16" OD, 30 Pack - Corrosion-Resistant SAE Washers for Bolts

Kuprowin 5/8" black stainless steel flat washers feature precise 1-5/16" outer diameter and 304 stainless construction for superior strength and corrosion resistance. DIYers and professionals should buy them for reliable indoor/outdoor bolting applications.

  • Exceptional corrosion resistance protects against rust in wet or outdoor conditions
  • 304 stainless steel delivers high strength for secure, long-lasting fastening
  • Black coating offers a sleek, professional finish that resists chipping
  • Precise 5/8" inner diameter ensures perfect fit over standard bolts
  • Thin 0.075" profile distributes load evenly without adding bulk

Durable 304 stainless steel with black finish for corrosion protection. Exact sizing for 5/8" bolts with 1-5/16" outer diameter. Generous 30-pack quantity for value and convenience.

Black finish may show wear in highly abrasive environments. Specific to 5/8" bolts, not interchangeable with other sizes. Thin profile suits light to medium duty, not extreme heavy loads.

300-Piece 304 Stainless Steel Flat Washers Assortment Kit - 8 SAE Sizes #6-#12, 1/4-1/2" for Bolts, Screws & DIY Repairs

This 300-piece SAE flat washers kit features 8 sizes from #6 to 1/2 inch, crafted from corrosion-resistant 304 stainless steel. Its bulk quantity and organized compartments make it perfect for mechanics, DIY enthusiasts, and marine professionals tackling repairs and maintenance.

  • Rust-proof 304 stainless steel ensures durability in wet, salty, or outdoor conditions like marine and automotive use
  • 8 versatile SAE sizes (#6 to 1/2") handle everything from small screws to large bolts in one convenient kit
  • 300 pieces per set (15-55 per size) provide bulk savings, eliminating frequent reordering for pros and hobbyists
  • Organized compartments keep washers sorted and ready for quick grabs during projects
  • Precision 1-2mm thickness distributes loads evenly, resists vibration, and protects fasteners from damage

Superior corrosion resistance ideal for harsh environments. Wide range of 8 SAE sizes fits most common bolt applications. Cost-effective bulk pack with easy organization.

Limited to SAE sizes only, no metric equivalents. Thickness range (1-2mm) may not suit ultra-thin applications. Organizer box could wear with heavy daily professional use.

ZQZ 108pcs 304 Stainless Steel Flat Washers Assortment Kit - 12 Metric Sizes M3-M12 Wide Fender Washers for DIY & Construction

This ZQZ kit provides 108 flat washers in 12 metric sizes from M3 to M12, made of corrosion-resistant 304 stainless steel to prevent bolt loosening from vibration. DIYers, furniture repairers, and builders should buy it for its versatile, organized fastening solutions.

  • Versatile 12-size assortment tackles DIY furniture fixes to heavy construction projects
  • Rust-proof 304 stainless steel endures outdoor exposure and extends fastener life
  • Prevents nuts, bolts, and screws from loosening due to vibration and friction
  • Uniform thickness and smooth edges distribute loads evenly for machine stability
  • Organized clear case keeps 108 pieces sorted and easy to carry without mix-ups

Durable 304 stainless steel resists rust and corrosion effectively. 12 diverse sizes in 108 pieces cover most metric fastening needs. Convenient storage case prevents loss and simplifies organization.

Limited to metric sizes, no imperial equivalents included. Slightly magnetic despite stainless steel construction. Quantities per size not evenly distributed or specified.

QKP 143pcs Flat Rubber Washers Assortment Kit, 10 Sizes 7-30mm Gaskets for Pipes, Hoses, Screws, Plumbing, Garden Bolts & Shower Fittings

QKP 143Pcs Flat Rubber Washers Kit provides 10 sizes from 7mm to 30mm for versatile sealing in plumbing, hoses, and DIY projects. Its high-quality rubber ensures leak-proof performance and durability, perfect for DIYers, plumbers, and handymen.

  • Versatile 143-piece kit with 10 precise sizes (7-30mm) covers most household and DIY sealing needs without hunting for matches
  • Premium rubber delivers superior flexibility, leak prevention, and vibration reduction for long-lasting protection
  • Ideal for plumbing, hoses, taps, pipes, showers, and garden bolts to ensure secure, watertight connections
  • Sturdy storage box keeps sizes organized and accessible, saving time and space in your toolkit
  • Flat design creates tight seals against gaps, blocking water, air, or oil leaks while protecting parts from wear

Abundant quantity and size variety for broad applications. Excellent water and wear resistance for reliable performance. Convenient organized storage box.

Limited pieces per larger sizes may require restocking for heavy use. Rubber may soften in extreme heat over time. Not ideal for high-pressure industrial applications.

kvohlum 50 Pack 5/16" 304 Stainless Steel Flat Washers Black Finish - Corrosion-Resistant for Bolts, Screws, Outdoor Use

kvohlum's 50-pack of 5/16" 304 stainless steel flat washers with black finish excels in corrosion resistance and load distribution to prevent fasteners from pulling through surfaces. Buy these for electrical repairs, factory maintenance, furniture fixes, or outdoor construction projects.

  • Distributes load evenly under fastener heads for secure, damage-free holding
  • 304 stainless steel with black coating resists corrosion in harsh environments
  • Prevents bolts and nuts from pulling through surfaces during heavy use
  • High tenacity and temperature resistance for reliable performance
  • Ideal for electrical repairs, factory maintenance, and outdoor projects

Superior corrosion and heat resistance from 304 SS and black finish. Enhances fastener stability by spreading load effectively. Versatile for repairs in electrical, furniture, and construction applications.

Thin 0.07" thickness may limit use in extremely heavy-duty applications. Black finish could wear over time in abrasive environments. Fixed 50-piece pack may be more than needed for small jobs.

zcgxbel 650-Piece Nylon Flat Washers Assortment Kit, 7 Sizes M3-M12 Black Plastic for Screws Bolts, Durable Washer Set for DIY & Commercial Use

This 650-piece nylon flat washers kit includes 7 sizes from M3 to M12, packed in an organized transparent box with labeled compartments. Its high-hardness nylon offers superior wear, corrosion resistance, and insulation, making it perfect for DIYers, household repairs, and professionals in harsh environments.

  • Versatile 7-size range (M3-M12) covers all your screw and bolt fastening needs
  • Durable nylon construction resists corrosion, wear, and harsh weather for long-lasting reliability
  • Excellent insulation properties protect against electrical hazards in maintenance tasks
  • Generous 650-piece count ensures ample supply for multiple projects
  • Organized storage box with labeled grids for instant size identification and easy access

Comprehensive sizing from M3 (200pcs) to M12 (16pcs) for broad compatibility. High-quality nylon provides hardness, weather resistance, and insulation. Convenient transparent box keeps washers sorted and portable.

Fewer pieces in larger sizes (e.g., only 16 each for M10/M12). Requires verifying sizes and nylon material before purchase to ensure fit. Nylon may compress under extreme high-load applications.

BoltDropper 100-Pack Stainless Steel Fender Washers 1/4 x 1-1/4 Inch - Rust-Resistant Flat Washers for Bolts, Screws in Wood, Metal, Wet Areas

BoltDropper's pack of 100 stainless steel fender washers measures 1/4 x 1-1/4 inches with 0.050-inch thickness for reliable fastening in wood, metal, and wet environments. Their 18-8 stainless steel construction provides standout corrosion resistance, making them perfect for DIYers, contractors, and marine applications.

  • Boosts fastening strength with wide surface area for secure holds on screws and bolts in demanding projects
  • Shields against rust and corrosion in wet, outdoor, or marine settings for long-lasting performance
  • Evenly spreads load to minimize surface damage and prevent loosening from vibrations or heavy use
  • Versatile for construction, plumbing, automotive, and DIY tasks requiring dependable reinforcement
  • Distributes pressure effectively to enhance stability under heavy loads or dynamic conditions

Superior corrosion resistance from 18-8 stainless steel for indoor/outdoor durability. Wide 1-1/4-inch outer diameter provides excellent load distribution. Generous 100-pack quantity offers great value for frequent use.

Thin 0.050-inch thickness may not suffice for ultra-heavy industrial loads. Fixed 1/4-inch size limits use with larger or smaller fasteners. Bulk pack of 100 may overwhelm users needing only a few washers.

Hillman 280062 7/16-Inch Zinc Flat Washers 50-Pack - Corrosion-Resistant for Decks, Fences & Bolts

Hillman 280062 7/16-Inch flat washers in a 50-pack provide a greater bearing surface to prevent nuts or bolts from tearing through materials during assembly. Their zinc coating delivers corrosion resistance, making them ideal for DIYers building decks, fences, or any outdoor projects with coarse threaded bolts.

  • Zinc coating shields against rust and corrosion for long-lasting outdoor performance
  • Expanded bearing surface distributes pressure to avoid material damage from bolts
  • SAE fine design fits coarse threaded bolts securely in decks and fences
  • Boosts bolt or screw clamping force for stronger, more reliable fastenings
  • Matches fastener finishes for a uniform, professional look on projects

Corrosion-resistant zinc finish extends washer lifespan in wet environments. Prevents pull-through damage with superior bearing surface. Compatible with coarse bolts for common deck and fence applications.

Specific 7/16-inch inner diameter limits use to matching bolt sizes. Zinc plating may not withstand extreme marine or chemical exposure. SAE fine spec tailored for coarse threads, not ideal for all bolt types.

Whether you're tackling heavy-duty industrial projects, automotive repairs, or home DIY tasks, washers are essential for distributing load, preventing loosening, and protecting surfaces in fastening applications. In our Fasteners category under Industrial & Scientific, you'll find high-quality options like SAE flat washers, fender washers, and stainless steel assortments from trusted brands, ensuring secure and long-lasting connections.

Understanding Washers: Types and Key Features

Washers come in various designs to suit specific needs. Flat washers, such as the popular SAE sizes from The Hillman Group, provide a smooth bearing surface under bolt heads or nuts, ideal for general assembly. Fender washers, with their larger outer diameters, excel in applications requiring greater load distribution, like automotive fenders or roofing—check out stainless steel versions from KANSPHY for corrosion resistance.

Key factors to consider when shopping include:

  • Size Specifications: Inner diameter (ID) matches bolt size (e.g., 1/4-inch), outer diameter (OD) for coverage, and thickness for durability.
  • Material: 18-8 (304) stainless steel for rust-proofing in outdoor or marine environments; zinc-plated steel for cost-effective indoor use; Grade 8 for high-strength demands.
  • Standards and Grades: SAE washers meet precise tolerances; ASME B18.21.1 ensures industrial-grade reliability.
  • Pack Quantity: From 40-piece sets to 1100-piece assortments for bulk projects or kits.

For example, MakersBolt's zinc-plated fender washers offer commercial-grade performance, while Lordhardware's 304 stainless flats provide superior corrosion resistance in harsh conditions. Explore MakersBolt Washers for thru-hardened options or KANSPHY Washers for precise stainless fits.

Common Use Cases for Industrial Washers

These fasteners shine in diverse scenarios. In construction, large fender washers secure lag bolts to wood framing. Automotive enthusiasts use them under fender bolts to prevent pull-through. For mechanical repairs, metric assortments like the 547-piece stainless set handle furniture, machinery, and electronics assembly.

DIYers appreciate black metal assortments for quick fixes in furniture or shelving, spanning M2 to M12 sizes. Hillman's SAE packs, such as the 1/4-inch 100-pack, are go-to for hardware stores and workshops. If your project involves outdoor exposure, prioritize stainless steel to avoid rust—perfect alongside tools in broader Industrial & Scientific setups.

How to Choose the Right Washer for Your Project

Start by matching the washer ID to your bolt size—too loose causes slippage, too tight prevents seating. Assess environmental factors: stainless for wet areas, zinc or plain steel for dry. For high-vibration applications, opt for Grade 8 or locking varieties.

Buyers often overlook thickness; thicker washers (e.g., 0.078 inches) handle heavier loads. Bulk packs save money for pros, while assortments suit varied tasks. Compare packs like DINGBANG's 120-piece fender set for repairs versus Hillman's precise SAE offerings for standards compliance.

Frequently Asked Questions

What is the difference between flat washers and fender washers?

Flat washers have a smaller OD relative to ID for standard load distribution, while fender washers feature a much larger OD for spanning oversized holes or soft materials, preventing damage.

Are stainless steel washers better than zinc-plated ones?

Stainless (18-8/304) offers superior corrosion resistance for outdoor/marine use, but zinc-plated steel is more affordable and sufficient for indoor/dry environments with good strength.

What does SAE mean for washers?

SAE (Society of Automotive Engineers) specifies standardized dimensions for U.S. imperial sizes, ensuring compatibility in automotive and industrial applications.

Can I use metric washers with imperial bolts?

It's not recommended due to mismatched hole sizes; stick to matching systems or use oversized washers cautiously to avoid weak joints.

How many washers do I need per bolt?

Typically one under the nut and one under the bolt head, but use extras for slotted holes or high-load scenarios to improve stability.

Equip your toolkit with reliable washers today—browse our selection for the perfect fit and elevate your fastening projects with confidence.

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