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    56 Products

    Plastic Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Plastic Unthreaded Spacers.
    Lightweight, nonconductive, and naturally rust resistant, these plastic spacers are commonly used for electronic and automation applications.
    Nylon 6/6—These abrasion-resistant spacers stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so these spacers are best for dry environments.
    Lg.
    For Screw
    Size
    ID
    Temp. Range,
    ° F
    Specs. Met
    Flammability
    Rating
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon 6/6
     
    3/4" OD
    1/4"5/16"
    0.312"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    Off-White2594639A25800000
     

    USS Washers

    These washers meet USS sizing specifications and typically have larger diameters than SAE washers. As a result, they accommodate larger screws and nuts and distribute pressure across a wider surface area. They are also thicker, so they withstand heavier loads and span wider gaps when used as spacers.
    Stainless SteelAbout Stainless Steel
    Image of Product. Front orientation. Washers. USS Washers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to harsh chemicals as well as 316 stainless steel.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these washers won't degrade when exposed to harsh weather, salt water, and most chemicals.
    High-Temperature High-Strength A286 Stainless Steel—These washers resist high temperatures up to 1300° F. In addition, they are stronger than 316 stainless steel and withstand chemicals, such as bleach and chlorine. However, they won't hold up to salt water as well as 316 stainless steel.
    Material Certificate—Washers include a report with a traceable lot number.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1/4"
    0.312"0.750"0.051" to 0.080"Material Certificate
    5093852A102000000
     
    Black-Oxide 18-8 Stainless Steel
    1/4"
    0.312"0.750"0.051" to 0.080"2593852A1710000
     
    Highly Corrosion-Resistant 316 Stainless Steel
    1/4"
    0.312"0.750"0.051" to 0.080"Material Certificate
    5093852A13100000
     
    High-Temperature High-Strength A286 Stainless Steel
    1/4"
    0.312"0.734"0.051" to 0.080"ASME B18.21.1198189A11200000
     
    Steel
    Image of Product. Front orientation. Washers. USS Washers.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    Steel—Best for dry environments since moisture will cause these washers to rust.
    Corrosion-Resistant Galvanized Steel—These washers combine the strength of steel with the rust resistance of stainless steel. They're an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.
    Black Super-Corrosion-Resistant-Coated Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    Small Pack
    Large Pack
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    0.312"0.750"0.051" to 0.080"10090108A4130000074590108A029000000
     
    Zinc-Yellow-Chromate-Plated Steel
    1/4"
    0.312"0.734"0.051" to 0.080"SAE Grade 8
    ASME B18.21.110098026A02900000———0
     
    Steel
    1/4"
    0.312"0.750"0.051" to 0.080"10091081A129000074591081A02900000
     
    Corrosion-Resistant Galvanized Steel
    1/4"
    0.312"0.750"0.051" to 0.080"ASME B18.21.110098970A1290000———0
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    0.312"0.750"0.051" to 0.080"ASME B18.21.11096582A30400000———0
    1/4"
    0.312"0.750"0.051" to 0.080"SAE Grade 8
    1098189A45200000———0
     
    AluminumAbout Aluminum
    Image of Product. Front orientation. Washers. USS Washers.
    One-third the weight of steel, these washers are commonly used in robotics, automation, and other applications that have weight limits. They're an alternative to stainless steel for rust resistance, but aren't as strong.
    For Screw
    Size
    ID
    OD
    Thk.
    Pkg.
    Qty.
    Pkg.
    Aluminum
    1/4"
    0.312"0.750"0.051" to 0.080"5090459A101000000
     

    Square Washers

    Image of Product. Bottom orientation. Washers. Square Washers.
    With flat sides, these washers fit into slots and channels and won't rotate out of position. They are also wider and thicker than most round washers, so they distribute heavier loads across a larger surface area. Square washers are commonly used to anchor heavy machinery, fasten framing to floors, and hang pipe and conduit from strut channel.
    Steel
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Black-Oxide Steel—Typically chosen for their appearance, these washers have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Corrosion-Resistant Galvanized Steel—These washers combine the strength of steel with the rust resistance of stainless steel. They're an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.
    For Screw
    Size
    ID
    Wd.
    Thk.
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    0.312"0.750"0.110" to 0.130"1099041A103000000
    1/4"
    0.312"2.000"0.225" to 0.265"599041A15200000
     
    Black-Oxide Steel
    1/4"
    0.312"2.000"0.235" to 0.265"191128A1100000
     
    Corrosion-Resistant Galvanized Steel
    1/4"
    0.312"2.000"0.220" to 0.280"191133A1860000
     

    Plastic Washers

    Image of Product. Front orientation. Washers. Plastic Washers.
    All of these washers are lightweight, nonconductive, and naturally rust resistant. They are commonly used in electronics and automation applications to take the pressure off screws and nuts and protect mounting surfaces.
    Nylon—The most popular plastic washers, these are strong, durable, and economical. Nylon will swell and weaken when exposed to moisture, so these washers are best for dry environments.
    Acid-Resistant PVC—A great choice for chemical-processing lines, these washers won't degrade when exposed to harsh acids, alkalis, and alcohols. They are also good electrical insulators.
    Temp.
    Range, ° F
    For Screw
    Size
    ID
    OD
    Thk.
    Min.
    Max.
    Choose a Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    1/4"
    0.312"0.500"0.026" to 0.036"-40180Black, Off-White10095606A43000000
     
    Acid-Resistant PVC
    1/4"
    0.312"0.750"0.053" to 0.071"Not Rated140Gray5095611A02900000
     

    Leveling Washers for I-Beams

    Image of ProductInUse. Mounted on an I-Beam. Front orientation. Leveling Washers. Leveling Washers for I-Beams.

    Mounted

    on an

    I-Beam

    Image of Product. Front orientation. Contains Annotated. Leveling Washers. Leveling Washers for I-Beams.
    Commonly called beveled washers, these are tapered to fit inside an I-beam's flange to provide a parallel bearing surface.
    Black-Oxide Iron—Black-oxide iron washers have a matte-black finish that prevents corrosion in dry environments.
    Galvanized Iron—Galvanized iron washers are corrosion resistant in wet environments.
    Aluminum—Aluminum washers are lightweight and corrosion resistant in wet environments.
    18-8 Stainless Steel—18-8 stainless steel washers have good chemical resistance and may be mildly magnetic. These washers are the most corrosion-resistant option.
    Thk.
    For Screw
    Size
    ID
    Wd.
    (A)
    (B)
    Hardness
    Pkg.
    Qty.
    Pkg.
    Iron
    1/4"
    0.312"0.688"0.219"0.078"Rockwell B832591151A029000000
     
    Black-Oxide Iron
    1/4"
    0.312"0.688"0.219"0.078"Rockwell B831091228A1110000
     
    Galvanized Iron
    1/4"
    0.312"0.688"0.219"0.078"Rockwell B832591152A02900000
     
    Aluminum
    1/4"
    0.312"0.688"0.219"0.078"Not Rated592810A1100000
     
    18-8 Stainless Steel
    1/4"
    0.312"0.875"0.250"0.125"Rockwell B45590845A01000000
     

    Mil. Spec. Washers

    These washers are manufactured and tested to strict U.S. military standards for material and construction. They take the pressure off screws and nuts to protect mounting surfaces.
    Stainless SteelAbout Stainless Steel
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these washers resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to harsh chemicals as well as 316 stainless steel.
    Material Certificate—Washers include a report with a traceable lot number.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
    1/4"
    0.312"0.734"0.051" to 0.080"MS15795-811, NASM15795ASME B18.21.1Material Certificate
    2598019A360000000
     
    Black-Oxide 18-8 Stainless Steel
    5/16"
    0.312"0.734"0.051" to 0.080"MS15795-811B, NASM15795Material Certificate
    5090618A13400000
     
    Steel
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    Zinc-Yellow-Chromate-Plated Steel—With the same corrosion resistance as zinc-plated steel, these withstand occasional exposure to moisture.
    Low-Friction Cadmium-Plated Steel—The plating reduces friction between the washer, fastener, and mounting surface to prevent sticking when fastening and loosening. It also creates a barrier against rust that's comparable to zinc yellow-chromate plating.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil.
    Spec.
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    5/16"
    0.312"0.734"0.051" to 0.080"MS51412-55091922A223000000
     
    Low-Friction Cadmium-Plated Steel
    1/4"
    0.312"0.500"0.027" to 0.048"MS27183-545098032A33100000
    1/4"
    0.312"0.875"0.051" to 0.075"MS27183-532598032A33200000
     
    Brass
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    Softer than most metals, brass washers won't damage other fastening components.
    Black-Oxide Brass—Typically chosen for their appearance, these washers have a dark, matte coating to create a finished look. They resist rust in wet and outdoor environments, but won't hold up to salt water and harsh chemicals.
    For Screw
    Size
    ID
    OD
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    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Brass
    1/4"
    0.312"0.734"0.051" to 0.080"MS15795-9111098102A131000000
     
    Copper
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    These have the best conductivity of all our metal washers. They're often used to secure electrical connections inside breaker panels and to fasten components on printed circuit boards. They're also the softest of all our metal washers, so they won't damage screws and nuts. However, copper washers aren't as corrosion resistant as brass washers, and will develop a green patina over time.
    For Screw
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    ID
    OD
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    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Copper
    1/4"
    0.312"0.734"0.051" to 0.080"MS15795-5112097565A126000000
     
    Nickel
    Image of Product. Front orientation. Washers. Mil. Spec. Washers.
    Highly Corrosion-Resistant 400 Nickel—Commonly found in the oil and gas industries, these washers have similar strength to 316 stainless steel, but are more corrosion resistant to stand up to salt water and harsh acids. They're often used as a high-strength alternative to titanium. Also known as Monel.
    For Screw
    Size
    ID
    OD
    Thk.
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Highly Corrosion-Resistant 400 Nickel
    1/4"
    0.312"0.734"0.051" to 0.080"MS15795-411597168A122000000
     

    Angled-Edge Tie Down Washers

    Image of Product. Front orientation. Contains Annotated. Tie-Down Washers. Angled-Edge Tie Down Washers.
    Use the angled edges to hold and align tie-down straps. They are zinc-plated steel for corrosion resistance in wet environments.
    For Screw
    Size
    ID
    OD
    Wd. of
    Flat
    Thk.
    Overall
    Ht.
    Hardness
    Pkg.
    Qty.
    Pkg.
    Zinc-Plated Steel
    1/4"
    0.312"1.250"0.840"0.056" to 0.070"0.278"Rockwell B401095990A103000000
     

    Hard Fiber Washers

    Image of Product. Front orientation. Washers. Hard Fiber Washers.
    The least likely to scratch or mar delicate mounting surfaces, these washers are made of hardened cotton fiber. They are also naturally nonconductive, so they are a great choice for insulating nuts and screws to prevent unintended charges. However, fiber washers will break down faster than other washers and will need to be replaced more often.
    For Screw
    Size
    ID
    OD
    Thk.
    Color
    Pkg.
    Qty.
    Pkg.
    5/16"
    0.312"0.438"0.014" to 0.016"Gray10090089A32000000
    5/16"
    0.312"0.438"0.028" to 0.034"Red10095601A3200000
    5/16"
    0.312"0.562"0.014" to 0.016"Gray10090089A3250000
    5/16"
    0.312"0.562"0.028" to 0.034"Red10095601A3250000

    Abrasion-Resistant Leather Cushioning Washers

    Image of Product. Front orientation. Cushioning Washers. Abrasion-Resistant Leather Cushioning Washers.
    These leather washers are nonmarring and they resist wear from rubbing and scraping surfaces. Use them to cushion joints and dampen vibration.
    For Screw
    Size
    ID
    OD
    Thk.
    Min.
    Temp.
    Max. Temp.,
    ° F
    Hardness
    Color
    Pkg.
    Qty.
    Pkg.
    Leather
    5/16"
    0.312"1.000"0.125" to 0.188"Not Rated150Durometer 75ABeige2595576A030000000
     

    General Purpose Washers

    Your go-to metal washer for every screw size. Washers take the pressure off nuts and screws to protect mounting surfaces.
    Stainless SteelAbout Stainless Steel
    Image of Product. Front orientation. Washers. General Purpose Washers.
    Image of Specification. Front orientation. Washers. General Purpose Washers.
    High-Strength 17-7 PH Stainless Steel—Some of the strongest stainless steel washers we offer, these are comparable to high-strength Grade 8 steel. They won’t rust in wet and outdoor environments, but they can’t handle the harsh chemicals that 316 stainless steel can.
    High-Temperature High-Strength A286 Stainless Steel—These washers resist high temperatures up to 1300° F. In addition, they are stronger than 316 stainless steel and withstand chemicals, such as bleach and chlorine. However, they won't hold up to salt water as well as 316 stainless steel.
    Material Certificate—Washers include a report with a traceable lot number.
    For Screw
    Size
    ID
    OD
    Thk.
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    High-Strength 17-7 PH Stainless Steel
    1/4"
    0.312"0.750"0.058" to 0.068"1091860A029000000
     
    High-Temperature High-Strength A286 Stainless Steel
    1/4"
    0.312"0.734"0.051" to 0.080"ASME B18.21.1Material Certificate
    198189A20000000
     
    Steel
    Image of Product. Front orientation. Washers. General Purpose Washers.
    Image of Specification. Front orientation. Washers. General Purpose Washers.
    Corrosion-Resistant Chrome-Plated Steel—The brightest, shiniest finish we offer, this plating has a mirror-like appearance that is often used in decorative applications. It resists salt water and chemicals better than zinc plating and is less likely to wear off.
    Black Super-Corrosion-Resistant-Coated Steel—Combines a finished appearance with the rust resistance of 316 stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.
    Material Certificate—Washers include a report with a traceable lot number.
    For Fastener Strength Grade/Class—If you require screws or nuts with a specific fastener strength rating, make sure your washer matches the grade or class.
    For Screw
    Size
    ID
    OD
    Thk.
    For Fastener Strength
    Grade/Class
    Specs. Met
    Certificate Type
    Pkg.
    Qty.
    Pkg.
    Corrosion-Resistant Chrome-Plated Steel
    1/4"
    0.312"0.734"0.051" to 0.080"ASME B18.21.11093960A120000000
     
    Black Super-Corrosion-Resistant-Coated Steel
    1/4"
    0.312"0.750"0.055" to 0.072"SAE Grade 8
    Material Certificate
    1098026A11100000
     

    Sealing Washers

    Prevent leaks while distributing weight evenly under nuts and screws. These washers compress as you tighten to keep air and fluid in, and dust and contaminants out. Use them anywhere you need a tight seal, such as protecting electronics from moisture or keeping lubricants contained in machinery.
    Rubber
    Image of Product. Front orientation. Sealing Washers. Rubber.
    Resist leaks better than metal sealing washers, but are more susceptible to wear and tear. Reuse these washers a handful of times, as long as the material isn't damaged.
    Oil-Resistant Buna-N—With the best oil resistance of all our rubber washers, these won't swell or soften when they touch oil, grease, or fuel. However, they will break down if exposed to synthetic lubricants.
    Oil-Resistant Aramid-Reinforced Buna-N—These washers are embedded with aramid, which is the same material used in bulletproof vests. This addition makes them stronger and more heat resistant than standard Buna-N washers for a longer lifespan. They won't degrade when exposed to oil, grease, and fuel.
    Cork/Neoprene—Combine the cushioning of cork with the durability of rubber. These washers dampen vibration and noise in rattling assemblies while maintaining a strong seal.
    Temp.
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    Food Industry Std.
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    Oil-Resistant Buna-N
    5/16"
    0.312"0.563"0.046" to 0.078"-20175WhiteFDA Compliant 21 CFR 177.2600
    5099082A220000000
    5/16"
    0.312"0.688"0.046" to 0.078"-20175WhiteFDA Compliant 21 CFR 177.2600
    5099082A23000000
     
    Oil-Resistant Aramid-Reinforced Buna-N
    5/16"
    0.312"0.625"0.054" to 0.070"-20460Green1093303A10300000
    5/16"
    0.312"0.750"0.054" to 0.070"-20460Green1093303A10400000
     
    Cork/Neoprene
    1/4"
    0.312"0.625"0.046" to 0.078"-30230Brown/Black1098884A30300000
    1/4"
    0.312"0.750"0.046" to 0.078"-30230Brown/Black1098884A30400000
     
    Plastic
    Image of Product. Front orientation. Sealing Washers. Plastic.
    Extreme heat and cold pose no problem for these resilient sealing washers. They won't deform or lose strength at temperatures as low as -400° F and as high as 525° F to handle everything from liquid nitrogen to heating elements. They are also the most chemical-resistant plastic washers we offer to withstand a wide range of acids, bases, solvents, and corrosive cleaners. ePTFE is more flexible than standard PTFE, so these washers compress easily to hold a strong seal. Reuse them a handful of times, as long as the material isn't damaged.
    Temp.
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    Extreme-Temperature Ultra-Chemical-Resistant ePTFE
    5/16"
    0.312"0.625"0.035" to 0.070"-200400White596371A203000000
     

    Press-Fit Reamer Bushings

    Image of ProductInUse. Front orientation. Drill Bushings. Press-Fit Reamer Bushings.
    Image of Product. Front orientation. Drill Bushings. Press-Fit Reamer Bushings.
    With ID tolerances sized specifically for reamers, these bushings ensure steady and precise hole finishing. Press them into a fixture plate with a manual or hydraulic press for permanent installation. Also known as headless bushings, these ANSI-type P bushings don’t need counterboring to be mounted flush. They are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.
    Tolerance
    ID
    OD
    Lg.
    For Reamer
    Dia.
    ID
    OD
    Lg.
    Drill Bushing
    Type
    Material
    Hardness
    Each
    0.312"1/2"1/2"0.312"0.0006" to 0.001"0.0014" to 0.0017"-0.01" to 0.01"PSteelRockwell C619473N31800000

    Wool Cushioning Washers

    Image of Product. Front orientation. Cushioning Washers. Wool Cushioning Washers.
    These wool felt washers can be soaked with oil to lubricate joints. Use them to cushion joints and dampen vibration.
    For Screw
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    Specs.
    Met
    Pkg.
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    Pkg.
    Wool Felt
    5/16"
    0.312"0.562"0.236" to 0.264"-80200Durometer 30AGraySAE J314595571A620000000
     

    Bonded Sealing Washers

    Image of Product. Front orientation. Sealing Washers. Bonded Sealing Washers.
    These washers create a stronger seal than metal or rubber alone to lock air and fluid in, while keeping dust and contaminants out. The flexible rubber layer compresses to fill gaps, while the metal backing stops the washer from squeezing through the hole. These washers are a great solution if you have a hole larger than your fastener that you need to seal. Reuse them a handful of times, as long as the material isn't damaged.
    18-8 Stainless Steel and Neoprene—Withstand prolonged exposure to wet and outdoor environments without rusting.
    Temp.
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    18-8 Stainless Steel and Neoprene
    1/4"
    0.312"0.750"0.111" to 0.150"-40250Black194709A15200000
     

    Wave Disc Springs

    Image of Product. Front orientation. Disc Springs. Wave Disc Springs.
    Multiple contact points spread the load evenly, so these springs balance support better than curved disc springs. They also handle higher thrust loads than wave spring lock washers.
    To increase your working load, nest multiple springs on top of each other. Multiply the working load by the number of springs to find your new total. If you need to increase both working load and deflection, consider Stacked Wave Disc Springs instead.
    Steel—Strong and resilient, but best suited for dry environments since moisture will cause these springs to rust.
    ID
    OD
    Thk.
    Ht.
    Compressed Ht.
    @ Working Load
    Deflection @
    Working Load
    Working
    Load, lb.
    Material
    Pkg.
    Qty.
    Pkg.
     
    Steel
    0.312"0.463"0.016"0.031"0.027"0.004"54Steel109714K36100000
    0.312"0.463"0.02"0.05"0.047"0.003"97Steel109714K3630000
     

    Fiberglass Washers

    Image of Product. Front orientation. Washers. Fiberglass Washers.
    A lightweight alternative to stainless steel, these fiberglass washers have the best strength-to-weight ratio of all our nonmetal washers. Commonly used to distribute pressure under nuts and screws in building frames, they are a great fit when you need something more robust than plastic, but still have to stay within a certain weight limit.
    Temp.
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    Qty.
    Pkg.
    5/16"
    0.312"0.562"0.054" to 0.070"Not Rated280Light Green1093493A23500000
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