McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    90 Products

    Washdown Bonded Sealing Washers

    Image of Product. Bottom orientation. Sealing Washers. Washdown Bonded Sealing Washers.
    Maintain the washdown rating of your enclosure, even after drilling holes in it. These washers protect against high-volume jets of water, as well as dirt, ice, oil, and coolant. The flexible rubber layer compresses to fill gaps, while the metal backing stops the washer from squeezing through the hole. Reuse these washers a handful of times, as long as the material isn't damaged.
    High-Temperature 18-8 Stainless Steel and Silicone—These washers resist freezing and scorching temperatures without deforming or losing strength.
    Max.
    Pressure, psi
    Temp.
    Range, ° F
    Each
    For Screw
    Size
    ID
    OD
    Thk.
    For
    Fluids
    For
    Gases
    Min.
    Max.
    Color
    For Enclosure
    Rating
    1-99
    100-249
    250-Up
    High-Temperature 18-8 Stainless Steel and Silicone
    No. 6
    0.123"0.55"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000000
    No. 6
    0.123"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    No. 8
    0.175"0.55"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    No. 8
    0.175"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    No. 8
    0.175"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    No. 10
    0.2"0.55"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    No. 10
    0.2"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    1/4"
    0.265"0.75"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    1/4"
    0.265"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    1/4"
    0.265"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    5/16"
    0.325"0.75"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    5/16"
    0.325"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    5/16"
    0.325"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    3/8"
    0.385"0.75"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    3/8"
    0.385"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    3/8"
    0.385"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    7/16"
    0.422"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    7/16"
    0.422"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    1/2"
    0.485"1"0.047" to 0.109"100100-100400GreenIP66, IP68
    000000000000000000000
    1/2"
    0.485"1.5"0.047" to 0.109"100100-100400GreenIP66, IP68
    0000000000000000000000
    M3
    2.9 mm14 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M3
    2.9 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M4
    3.9 mm14 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M4
    3.9 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M5
    4.9 mm14 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M5
    4.9 mm19.1 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M5
    4.9 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M6
    5.9 mm19.1 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M6
    5.9 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M8
    7.8 mm19.1 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M8
    7.8 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M10
    9.8 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
    M12
    11.8 mm25.4 mm2 mm to 2.1 mm100100-100400RedIP66, IP68
    000000000000000000000
     

    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.
    High-Temperature Silicone—Withstand the widest temperature range of all our rubber washers. They resist detergents but will break down when exposed to oil, grease, and fuel.
    Temp.
    Range, ° F
    For Screw
    Size
    ID
    OD
    Thk.
    Min.
    Max.
    Color
    Food Industry Std.
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone
    No. 2
    0.093"0.188"0.021" to 0.041"-80450RedFDA Compliant 21 CFR 177.2600
    100000000000000000
    No. 4
    0.120"0.312"0.021" to 0.041"-80450RedFDA Compliant 21 CFR 177.2600
    10000000000000000
    No. 6
    0.120"0.250"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    10000000000000000
    No. 8
    0.150"0.312"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    500000000000000
    No. 10
    0.170"0.500"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    No. 12
    0.195"0.562"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    1/4"
    0.230"0.625"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    5/16"
    0.290"0.688"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    3/8"
    0.355"0.812"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    2500000000000000
    7/16"
    0.469"0.922"0.052" to 0.072"-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    1/2"
    0.490"1.062"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    2500000000000000
    5/8"
    0.615"1.312"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    100000000000000
    3/4"
    0.740"1.500"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    1000000000000000
    7/8"
    0.938"1.750"0.078" to 0.105"-80450RedFDA Compliant 21 CFR 177.2600
    1000000000000000
    1"
    0.990"2.000"0.083" to 0.103"-100450RedFDA Compliant 21 CFR 177.2600
    1000000000000000
    M3
    3.200 mm7.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M4
    4.300 mm9.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M5
    5.300 mm10.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M6
    6.400 mm12.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M8
    8.400 mm16.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M10
    10.500 mm20.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    5000000000000000
    M12
    13.000 mm24.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    2500000000000000
    M14
    15.000 mm28.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    2500000000000000
    M16
    17.000 mm30.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    100000000000000
    M18
    19.000 mm34.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    50000000000000
    M20
    21.000 mm37.000 mm1.320 mm to 1.820 mm-80450RedFDA Compliant 21 CFR 177.2600
    50000000000000
     

    Sanitary Sealing Grommets

    Image of Product. Front orientation. Grommets. Sanitary Sealing Grommets, Style 1.
    Image of Product. Front orientation. Grommets. Sanitary Sealing Grommets, Style 2.

    Style 1

    Style 2

    Seal out contaminants around wire, cable, cords, pipe, and tubing in food, cosmetics, and pharmaceutical plants. These grommets are made of nonporous silicone rubber and smooth, corrosion-resistant stainless steel to prevent bacteria and other contaminants from building up. They're also FDA compliant for direct contact with food. Locate the cutting lines on the exterior or underside of the grommet, then trim to the hole diameter you need.
    Style 1
    Image of Product. Front orientation. Grommets. Sanitary Sealing Grommets, Style 1.
    Mounting
    ID
    Flange
    Dia.
    Overall
    Ht.
    Temp.,
    ° F
    For Use
    Outdoors
    Color
    No. of
    Holes
    Fasteners
    Included
    Hole
    Dia.
    Food Industry Std.
    Each
    High-Temperature Silicone Rubber with 316 Stainless Steel Flange
    0" to 1"2 3/4"2"-40 to 500NoWhite4No0.177"FDA Compliant 21 CFR 177.2600
    0000000000000
    0" to 2 1/2"4 1/8"2 3/8"-40 to 500NoWhite4No0.177"FDA Compliant 21 CFR 177.2600
    000000000000
    0" to 3 3/4"5 3/4"3"-40 to 500NoWhite6No0.177"FDA Compliant 21 CFR 177.2600
    000000000000
     
    Style 2
    Image of Product. Front orientation. Grommets. Sanitary Sealing Grommets, Style 2.
    Mounting
    ID
    Flange
    Dia.
    Overall
    Ht.
    Temp.,
    ° F
    For Use
    Outdoors
    Color
    No. of
    Holes
    Fasteners
    Included
    Hole
    Dia.
    Food Industry Std.
    Each
    High-Temperature Silicone Rubber with 316 Stainless Steel Flange
    0" to 1"2 3/4"3/8"-40 to 500NoWhite4No0.177"FDA Compliant 21 CFR 177.2600
    0000000000000
    0" to 2 1/2"4 1/8"3/8"-40 to 500NoWhite4No0.177"FDA Compliant 21 CFR 177.2600
    000000000000
    0" to 3 3/4"5 3/4"3/8"-40 to 500NoWhite6No0.177"FDA Compliant 21 CFR 177.2600
    000000000000
     

    Sanitary Split Sealing Grommets

    Image of Product. Front orientation. Grommets. Sanitary Split Sealing Grommets.
    These grommets prevent contamination around wire, cable, cords, pipe, and tubing you’ve already installed. Often used in food-and-beverage and pharmaceutical plants, they're made of nonporous silicone and smooth, corrosion-resistant stainless steel to prevent bacteria from building up. To install, trim along the ridge to create the hole diameter you need. Then wrap the grommet around your line, clamp the staples to seal the grommet, and screw the flange onto the surface.
    Mounting
    ID
    Flange
    Dia.
    Overall
    Ht.
    Temp.,
    ° F
    For Use
    Outdoors
    Color
    No. of
    Holes
    Fasteners
    Included
    Hole
    Dia.
    Food Industry Std.
    Each
    High-Temperature Silicone Rubber with 316 Stainless Steel Flange
    0" to 2 1/2"4 1/8"2 3/8"-40 to 500NoWhite5No0.177"FDA Compliant 21 CFR 177.2600
    0000000000000
    0" to 3 3/4"5 3/4"3"-40 to 500NoWhite7No0.177"FDA Compliant 21 CFR 177.2600
    000000000000
     

    Tight-Hold Tapered Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Tight-Hold Tapered Plugs.
    Tighten the wing nut to expand the sides of these plugs until they seal. They’ll stay securely in place until you loosen the nut. Plugs fit a range of diameters to seal containers or keep coatings out of holes.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    For ID
    Ht.
    Trade
    Size
    Max. Temp.,
    ° F
    Color
    Nut Material
    Each
    High-Temperature Silicone Rubber
    41/64" to 25/32"1"2450OrangeStainless Steel
    000000000000
    23/32" to 15/16"1"3450OrangeStainless Steel
    00000000000
    51/64" to 1 1/64"1"4450ClearStainless Steel
    00000000000
    29/32" to 1 1/16"1"5450ClearStainless Steel
    00000000000
    61/64" to 1 3/32"1"5 1/2450ClearStainless Steel
    00000000000
    1 1/32" to 1 1/4"1"6450ClearStainless Steel
    00000000000
    1 5/64" to 1 21/64"1"6 1/2450ClearStainless Steel
    00000000000
    1 3/16" to 1 29/64"1"7450OrangeStainless Steel
    000000000000
    1 15/64" to 1 17/32"1"7 1/2450ClearStainless Steel
    000000000000
    1 5/16" to 1 39/64"1"8450ClearStainless Steel
    000000000000
    1 27/64" to 1 11/16"1"8 1/2450ClearStainless Steel
    000000000000
    1 15/32" to 1 49/64"1"9450ClearStainless Steel
    000000000000
    1 1/2" to 1 51/64"1"9 1/2450ClearStainless Steel
    000000000000
    1 21/32" to 1 31/32"1"10450OrangeStainless Steel
    000000000000
    1 25/32" to 2 5/64"1"10 1/2450ClearStainless Steel
    000000000000
    1 57/64" to 2 13/64"1"11450ClearStainless Steel
    000000000000
    1 63/64" to 2 15/32"1"11 1/2450ClearStainless Steel
    000000000000
    2 9/64" to 2 33/64"1"12450ClearStainless Steel
    000000000000
    2 19/64" to 2 21/32"1"13450ClearStainless Steel
    000000000000
    2 29/64" to 2 61/64"1 3/8"13 1/2450ClearStainless Steel
    000000000000
    2 61/64" to 3 17/32"1 17/32"14450ClearStainless Steel
    000000000000
    3 9/32" to 4 3/64"1 17/32"15450ClearStainless Steel
    0000000000000
    3 35/64" to 5"1 31/32"16450ClearStainless Steel
    0000000000000
     
    back to top