McMaster-Carr logo
    Filter by
    System of Measurement
    Washer Type
    Certification
    Specifications Met
    Shape
    Minimum Temperature
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Sold As
    Tensile Strength
    Industrial Info Snippet
    Dielectric Strength
    Mount Type
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    103 Products

    Mil. Spec. Plastic Washers

    Image of Product. Front orientation. Washers. Mil. Spec. Plastic Washers.
    These washers are manufactured and tested to strict U.S. military standards for material and construction. They are lightweight, nonconductive, and naturally rust resistant. Commonly used in electronics and automation applications, they take the pressure off screws and nuts to 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.
    Chemical-Resistant High-Temperature PTFE—The most chemical-resistant plastic washers we offer, these stand up to the widest range of harsh acids, bases, solvents, and corrosive cleaners, even at temperatures up to 500° F. Their slippery surface reduces friction between the washer, fastener, and mounting surface to prevent sticking when tightening and loosening. They are also good electrical insulators.
    Temp.
    Range
    For Screw
    Size
    ID
    OD
    Thk.
    Min.
    Max.,
    ° F
    Mil.
    Spec.
    Specs. Met
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 0
    0.068"0.203"0.016" to 0.024"Not Rated180MS51859-11White50000000000000000
    No. 1
    0.079"0.162"0.016" to 0.024"Not Rated180MS51859-12White5000000000000000
    No. 2
    0.098"0.203"0.025" to 0.035"Not Rated180MS51859-1White5000000000000000
    No. 2
    0.098"0.260"0.011" to 0.021"Not Rated180MS51859-13White10000000000000000
    No. 2
    0.105"0.250"0.021" to 0.041"Not Rated180NAS1515-H02LWhite10000000000000000
    No. 2
    0.105"0.250"0.053" to 0.073"Not Rated180NAS1515-H02White10000000000000000
    No. 4
    0.125"0.312"0.021" to 0.041"Not Rated180NAS1515-H04LWhite10000000000000000
    No. 4
    0.125"0.312"0.053" to 0.073"Not Rated180NAS1515-H04White10000000000000000
    No. 4
    0.127"0.297"0.031" to 0.049"Not Rated180MS51859-2White25000000000000000
    No. 4
    0.127"0.350"0.025" to 0.035"Not Rated180MS51859-14White10000000000000000
    No. 6
    0.149"0.375"0.021" to 0.041"Not Rated180NAS1515-H06LWhite500000000000000
    No. 6
    0.149"0.375"0.053" to 0.073"Not Rated180NAS1515-H06White5000000000000000
    No. 6
    0.160"0.328"0.031" to 0.049"Not Rated180MS51859-3White10000000000000000
    No. 8
    0.174"0.375"0.021" to 0.041"Not Rated180NAS1515-H08LWhite500000000000000
    No. 8
    0.174"0.375"0.053" to 0.073"Not Rated180NAS1515-H08White500000000000000
    No. 8
    0.192"0.406"0.031" to 0.065"Not Rated180MS51859-4White10000000000000000
    No. 10
    0.203"0.438"0.021" to 0.041"Not Rated180NAS1515-H3LWhite500000000000000
    No. 10
    0.203"0.438"0.053" to 0.073"Not Rated180NAS1515-H3White5000000000000000
    No. 10
    0.203"0.438"0.084" to 0.104"Not Rated180NAS1515-H3HWhite5000000000000000
    No. 10
    0.225"0.469"0.031" to 0.065"Not Rated180MS51859-5White10000000000000000
    1/4"
    0.265"0.500"0.021" to 0.041"Not Rated180NAS1515-H4LWhite5000000000000000
    1/4"
    0.265"0.500"0.053" to 0.073"Not Rated180NAS1515-H4White5000000000000000
    1/4"
    0.265"0.500"0.084" to 0.104"Not Rated180NAS1515-H4HWhite5000000000000000
    1/4"
    0.290"0.572"0.056" to 0.070"Not Rated180MS51859-17White5000000000000000
    1/4"
    0.290"0.688"0.040" to 0.065"Not Rated180MS51859-6White5000000000000000
    1/4"
    0.290"0.890"0.025" to 0.035"Not Rated180MS51859-18White5000000000000000
    5/16"
    0.328"0.562"0.021" to 0.041"Not Rated180NAS1515-H5LWhite500000000000000
    5/16"
    0.328"0.562"0.053" to 0.073"Not Rated180NAS1515-H5White5000000000000000
    5/16"
    0.328"0.562"0.084" to 0.104"Not Rated180NAS1515-H5HWhite5000000000000000
    5/16"
    0.355"0.708"0.040" to 0.065"Not Rated180MS51859-7White500000000000000
    3/8"
    0.390"0.625"0.021" to 0.041"Not Rated180NAS1515-H6LWhite5000000000000000
    3/8"
    0.390"0.625"0.053" to 0.073"Not Rated180NAS1515-H6White5000000000000000
    3/8"
    0.390"0.625"0.084" to 0.104"Not Rated180NAS1515-H6HWhite5000000000000000
    3/8"
    0.420"0.832"0.040" to 0.065"Not Rated180MS51859-8White5000000000000000
    7/16"
    0.453"0.750"0.021" to 0.041"Not Rated180NAS1515-H7LWhite5000000000000000
    7/16"
    0.453"0.750"0.053" to 0.073"Not Rated180NAS1515-H7White5000000000000000
    7/16"
    0.453"0.750"0.084" to 0.104"Not Rated180NAS1515-H7HWhite5000000000000000
    7/16"
    0.484"0.942"0.040" to 0.065"Not Rated180MS51859-9White2500000000000000
    1/2"
    0.515"0.875"0.021" to 0.041"Not Rated180NAS1515-H8LWhite5000000000000000
    1/2"
    0.515"0.875"0.053" to 0.073"Not Rated180NAS1515-H8White5000000000000000
    1/2"
    0.515"0.875"0.084" to 0.104"Not Rated180NAS1515-H8HWhite5000000000000000
    1/2"
    0.546"1.082"0.040" to 0.065"Not Rated180MS51859-10White100000000000000
    1/2"
    0.546"1.630"0.015" to 0.025"Not Rated180MS51859-22White100000000000000
    9/16"
    0.578"1.062"0.021" to 0.041"Not Rated180NAS1515-H9LWhite250000000000000
    9/16"
    0.578"1.062"0.053" to 0.073"Not Rated180NAS1515-H9White250000000000000
    9/16"
    0.578"1.062"0.084" to 0.104"Not Rated180NAS1515-H9HWhite2500000000000000
    5/8"
    0.640"1.188"0.021" to 0.041"Not Rated180NAS1515-H10LWhite2500000000000000
    5/8"
    0.640"1.188"0.053" to 0.073"Not Rated180NAS1515-H10White2500000000000000
    5/8"
    0.640"1.188"0.084" to 0.104"Not Rated180NAS1515-H10HWhite100000000000000
    3/4"
    0.765"1.312"0.021" to 0.041"Not Rated180NAS1515-H12LWhite2500000000000000
    3/4"
    0.765"1.312"0.053" to 0.073"Not Rated180NAS1515-H12White2500000000000000
    3/4"
    0.765"1.312"0.084" to 0.104"Not Rated180NAS1515-H12HWhite100000000000000
    7/8"
    0.890"1.500"0.021" to 0.041"Not Rated180NAS1515-H14LWhite100000000000000
    7/8"
    0.890"1.500"0.053" to 0.073"Not Rated180NAS1515-H14White100000000000000
    7/8"
    0.890"1.500"0.084" to 0.104"Not Rated180NAS1515-H14HWhite100000000000000
    1"
    1.015"1.750"0.021" to 0.041"Not Rated180NAS1515-H16LWhite100000000000000
    1"
    1.015"1.750"0.053" to 0.073"Not Rated180NAS1515-H16White100000000000000
    1"
    1.015"1.750"0.084" to 0.104"Not Rated180NAS1515-H16HWhite1000000000000000
     
    Chemical-Resistant High-Temperature PTFE
    1/4"
    0.265"0.500"0.057" to 0.075"Not Rated500NAS1515-M4White50000000000000
    5/16"
    0.328"0.562"0.057" to 0.075"Not Rated500NAS1515-M5White50000000000000
    3/8"
    0.390"0.625"0.057" to 0.075"Not Rated500NAS1515-M6White500000000000000
    7/16"
    0.453"0.750"0.057" to 0.075"Not Rated500NAS1515-M7White500000000000000
    1/2"
    0.515"0.875"0.057" to 0.075"Not Rated500NAS1515-M8White500000000000000
    9/16"
    0.578"1.062"0.057" to 0.075"Not Rated500NAS1515-M9White500000000000000
    5/8"
    0.640"1.188"0.057" to 0.075"Not Rated500NAS1515-M10White500000000000000
    3/4"
    0.765"1.312"0.057" to 0.075"Not Rated500NAS1515-M12White500000000000000
    7/8"
    0.890"1.500"0.057" to 0.075"Not Rated500NAS1515-M14White500000000000000
    1"
    1.015"1.750"0.057" to 0.075"Not Rated500NAS1515-M16White500000000000000
     

    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.
    High-Temperature High-Strength PEEK—These are our strongest plastic spacers. They also won't degrade when exposed to high heat, so they're a good choice for transmission systems and electric battery packs. They aren't very impact resistant, however, and may crack or dent if subjected to hard bumps and vibrations.
    Military Specification—These spacers are manufactured and tested to meet strict U.S. military standards for material and construction.
    Lg.
    For Screw
    Size
    ID
    Temp. Range,
    ° F
    Specs.
    Met
    Mil. Spec.
    Color
    Each
    High-Temperature High-Strength PEEK
     
    3/8" OD
    1/4"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige000000000000000
    3/8"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1/2"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    5/8"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    3/4"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    7/8"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/4"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/2"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 3/4"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    2"No. 10
    0.192"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
     
    1/2" OD
    1/4"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    3/8"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1/2"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    5/8"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    3/4"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    7/8"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/4"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/2"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 3/4"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    2"1/4"
    0.252"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
     
    3/4" OD
    1/4"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    3/8"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1/2"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    5/8"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    3/4"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    7/8"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/4"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 1/2"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    1 3/4"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    2"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    2 1/4"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
    2 1/2"3/8"
    0.380"-40 to 480ASTM D4000MIL-P-46183 Type 1Beige00000000000000
     
    back to top