McMaster-Carr logo
    Filter by
    System of Measurement
    Cross Section Shape
    Thickness
    Backing Type
    Hardness Rating
    Construction
    Maximum Temperature
    Maximum Pressure
    Top Shape
    DFARS Specialty Metals
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    Help me decide (beta)
    74 Products

    Oil-Resistant Buna-N Backup Rings

    Image of ProductInUse. O-Ring Sealing Properly with Backup Ring. Front orientation. CrossSection view. Contains Annotated. Backup Rings. Oil-Resistant Buna-N Backup Rings.
    Image of ProductInUse. O-Ring Deforms Without a Backup Ring. Front orientation. CrossSection view. Contains Annotated. Backup Rings. Oil-Resistant Buna-N Backup Rings.

    O-Ring Sealing Properly with

    Backup Ring

    O-Ring Deforms Without a Backup Ring

    Image of Product. Bottom orientation. Backup Rings. Oil-Resistant Buna-N Backup Rings.
    Image of Attribute. Front orientation. CrossSection view. Contains Annotated. Oil-Resistant Buna-N Backup Rings.
    Extend the life of O-rings in oily, high-pressure systems that operate at up to 2,500 psi. These backup rings support O-rings and prevent them from deforming under pressure and causing pressure loss. Made of Buna-N, these rings won’t swell when exposed to grease, petroleum fluids, and motor oil. However, they will degrade when exposed to mild or harsh chemicals. They’re often used in hydraulic, automotive, and industrial systems. All have a shelf life, cure date, and a traceable lot number printed on the bag.
    Pkg.
    For Dash
    No.
    Thk.
    ID
    OD
    Hardness
    Temp. Range,
    ° F
    Color
    Pkg.
    Qty.
    1-9
    10-Up
    0.118" Wide
    202
    		0.05"0.265"0.501"Durometer 90A (Hard)-30 to 250Black1005288T2450000000000
    203
    		0.05"0.327"0.563"Durometer 90A (Hard)-30 to 250Black1005288T24600000000
    204
    		0.05"0.390"0.626"Durometer 90A (Hard)-30 to 250Black1005288T24700000000
    205
    		0.05"0.455"0.691"Durometer 90A (Hard)-30 to 250Black1005288T24800000000
    206
    		0.05"0.518"0.754"Durometer 90A (Hard)-30 to 250Black1005288T24900000000
    207
    		0.05"0.580"0.816"Durometer 90A (Hard)-30 to 250Black1005288T2500000000
    208
    		0.05"0.643"0.879"Durometer 90A (Hard)-30 to 250Black1005288T25100000000
    209
    		0.05"0.705"0.941"Durometer 90A (Hard)-30 to 250Black1005288T25200000000
    210
    		0.05"0.766"1.002"Durometer 90A (Hard)-30 to 250Black1005288T25300000000
    211
    		0.05"0.828"1.064"Durometer 90A (Hard)-30 to 250Black1005288T25400000000
    212
    		0.05"0.891"1.127"Durometer 90A (Hard)-30 to 250Black1005288T25500000000
    213
    		0.05"0.953"1.189"Durometer 90A (Hard)-30 to 250Black1005288T25600000000
    214
    		0.05"1.016"1.252"Durometer 90A (Hard)-30 to 250Black1005288T25700000000
    215
    		0.05"1.078"1.314"Durometer 90A (Hard)-30 to 250Black1005288T258000000000
    216
    		0.05"1.141"1.377"Durometer 90A (Hard)-30 to 250Black1005288T259000000000
    217
    		0.05"1.203"1.439"Durometer 90A (Hard)-30 to 250Black1005288T26000000000
    218
    		0.05"1.266"1.502"Durometer 90A (Hard)-30 to 250Black1005288T2610000000000
    219
    		0.05"1.334"1.57"Durometer 90A (Hard)-30 to 250Black1005288T2620000000000
    220
    		0.05"1.397"1.633"Durometer 90A (Hard)-30 to 250Black505288T26300000000
    221
    		0.05"1.459"1.695"Durometer 90A (Hard)-30 to 250Black505288T26400000000
    222
    		0.05"1.522"1.758"Durometer 90A (Hard)-30 to 250Black505288T26500000000
    223
    		0.05"1.647"1.833"Durometer 90A (Hard)-30 to 250Black505288T26600000000
    224
    		0.05"1.772"2.008"Durometer 90A (Hard)-30 to 250Black505288T26700000000
    225
    		0.05"1.897"2.133"Durometer 90A (Hard)-30 to 250Black505288T268000000000
    226
    		0.05"2.022"2.258"Durometer 90A (Hard)-30 to 250Black505288T269000000000
    227
    		0.05"2.147"2.383"Durometer 90A (Hard)-30 to 250Black505288T270000000000
    228
    		0.05"2.272"2.508"Durometer 90A (Hard)-30 to 250Black505288T2710000000000
    229
    		0.05"2.397"2.633"Durometer 90A (Hard)-30 to 250Black505288T2720000000000
    230
    		0.05"2.522"2.758"Durometer 90A (Hard)-30 to 250Black505288T2730000000000
    231
    		0.05"2.631"2.867"Durometer 90A (Hard)-30 to 250Black505288T2740000000000
    232
    		0.05"2.756"2.992"Durometer 90A (Hard)-30 to 250Black505288T2750000000000
    233
    		0.05"2.881"3.117"Durometer 90A (Hard)-30 to 250Black255288T27600000000
    234
    		0.05"3.006"3.242"Durometer 90A (Hard)-30 to 250Black255288T27700000000
    235
    		0.05"3.131"3.367"Durometer 90A (Hard)-30 to 250Black255288T278000000000
    236
    		0.05"3.256"3.492"Durometer 90A (Hard)-30 to 250Black255288T279000000000
    237
    		0.05"3.381"3.617"Durometer 90A (Hard)-30 to 250Black255288T2800000000
    238
    		0.05"3.506"3.742"Durometer 90A (Hard)-30 to 250Black255288T281000000000
    239
    		0.05"3.631"3.867"Durometer 90A (Hard)-30 to 250Black255288T2820000000000
    240
    		0.05"3.756"3.992"Durometer 90A (Hard)-30 to 250Black255288T2830000000000
    241
    		0.05"3.881"4.117"Durometer 90A (Hard)-30 to 250Black255288T2840000000000
    242
    		0.05"4.006"4.242"Durometer 90A (Hard)-30 to 250Black255288T2850000000000
    243
    		0.05"4.131"4.367"Durometer 90A (Hard)-30 to 250Black255288T2860000000000
    244
    		0.05"4.256"4.492"Durometer 90A (Hard)-30 to 250Black255288T2870000000000
    245
    		0.05"4.381"4.617"Durometer 90A (Hard)-30 to 250Black255288T2880000000000
    246
    		0.05"4.506"4.742"Durometer 90A (Hard)-30 to 250Black255288T2890000000000
    247
    		0.05"4.631"4.867"Durometer 90A (Hard)-30 to 250Black255288T290000000000
    248
    		0.05"4.768"5.004"Durometer 90A (Hard)-30 to 250Black255288T2910000000000
    249
    		0.05"4.893"5.129"Durometer 90A (Hard)-30 to 250Black255288T2920000000000
    250
    		0.05"5.018"5.254"Durometer 90A (Hard)-30 to 250Black105288T29300000000
    251
    		0.05"5.143"5.379"Durometer 90A (Hard)-30 to 250Black105288T29400000000
    252
    		0.05"5.268"5.504"Durometer 90A (Hard)-30 to 250Black105288T29500000000
    253
    		0.05"5.393"5.629"Durometer 90A (Hard)-30 to 250Black105288T29600000000
    254
    		0.05"5.518"5.754"Durometer 90A (Hard)-30 to 250Black105288T297000000000
    255
    		0.05"5.643"5.879"Durometer 90A (Hard)-30 to 250Black105288T29800000000
    256
    		0.05"5.768"6.004"Durometer 90A (Hard)-30 to 250Black105288T299000000000
    257
    		0.05"5.893"6.129"Durometer 90A (Hard)-30 to 250Black105288T31000000000
    258
    		0.05"6.018"6.254"Durometer 90A (Hard)-30 to 250Black105288T311000000000
    259
    		0.05"6.268"6.504"Durometer 90A (Hard)-30 to 250Black105288T3120000000000
    260
    		0.05"6.518"6.754"Durometer 90A (Hard)-30 to 250Black105288T3130000000000
    261
    		0.05"6.768"7.004"Durometer 90A (Hard)-30 to 250Black105288T3140000000000
    262
    		0.05"7.018"7.254"Durometer 90A (Hard)-30 to 250Black105288T3150000000000
    263
    		0.05"7.268"7.504"Durometer 90A (Hard)-30 to 250Black105288T3160000000000
    264
    		0.05"7.518"7.754"Durometer 90A (Hard)-30 to 250Black105288T3170000000000
    265
    		0.05"7.768"8.004"Durometer 90A (Hard)-30 to 250Black105288T3180000000000
     

    EMI/RFI Shielding Gaskets

    These gaskets absorb electromagnetic interference (EMI) and radio frequency interference (RFI) to prevent inaccurate signals, flickering displays, and other electrical problems. They compress to fill gaps and complete a grounding path around doors and access panels.
    Sheets
    Image of Product. Front orientation. EMI/RFI Shielding Gaskets. Sheets, Polyurethane Foam.

    Polyurethane Foam

    Sheets work well between two flat surfaces.
    Polyurethane Foam—Polyurethane foam gaskets are covered with either a conductive nickel/copper braided fabric or conductive aluminum foil. A nonconductive adhesive holds them in place. To protect sensitive equipment, they block at least twice as much interference as urethane foam gaskets. Cut these gaskets to length with scissors.
    Adhesive Backing—Adhesive-back gaskets stick to flat surfaces.
    UL 94 HF-1—Gaskets that meet UL 94 HF-1 stop burning within two seconds if they catch on fire and won’t spread the fire by dripping.
    UL 94 V-0—Gaskets that meet UL 94 V-0 self-extinguish within 10 seconds if they catch fire and won’t spread the fire by dripping.
    Thk.
    Wd.
    Lg.
    Interference Reduction
    @ Freq.
    Backing
    Type
    Temp. Range,
    ° F
    Color
    For Use
    Outdoors
    Flammability
    Rating
    Each
    Polyurethane Foam
    0.05"0.09"48"80 dB @ 1 GHzAdhesive-40 to 158BeigeNoUL 94 V-0
    		4046N48000000
    0.05"1"10"60 dB @ 1 GHzAdhesive-40 to 158GrayYesUL 94 HF-1
    		6180T4400000
     
    Half Round
    Image of Product. Front orientation. EMI/RFI Shielding Gaskets. Half Round.
    Half-round gaskets work well in grooves. Use a gasket slightly thicker than the depth of the groove; it will compress to fill the gap.
    Polyurethane Foam—Polyurethane foam gaskets are covered with either a conductive nickel/copper braided fabric or conductive aluminum foil. A nonconductive adhesive holds them in place. To protect sensitive equipment, they block at least twice as much interference as urethane foam gaskets. Cut these gaskets to length with scissors.
    Adhesive Backing—Adhesive-back gaskets stick to flat surfaces.
    UL 94 V-0—Gaskets that meet UL 94 V-0 self-extinguish within 10 seconds if they catch fire and won’t spread the fire by dripping.
    Thk.
    Wd.
    Lg.
    Interference Reduction
    @ Freq.
    Backing
    Type
    Temp. Range,
    ° F
    Color
    For Use
    Outdoors
    Flammability
    Rating
    Each
    Polyurethane Foam
    0.05"1/4"48"80 dB @ 1 GHzAdhesive-40 to 158BeigeNoUL 94 V-0
    		4046N15000000
     

    Aluminum Foil Tape

    Image of Product. Front orientation. Repair and Duct Tape. Aluminum Foil Tape.
    Create permanent, watertight seals for roof flashing, seams, and pipes. An aluminum-foil backing shields the adhesive from UV rays and harsh weather, so the bond stays strong over time. It adheres to virtually any building material, including metal, wood, plastic, concrete, brick, asphalt, and glass.
    Wd.
    Lg.,
    ft.
    Overall
    Thk.
    Adhesive
    Material
    Temp. Range,
    ° F
    Tensile
    Strength
    Choose a
    Color
    Each
    2"330.05"Asphalt-40 to 200Not RatedGray, Silver76395A1000000
    3"330.05"Asphalt-40 to 200Not RatedGray, Silver76395A200000
    4"330.05"Asphalt-40 to 200Not RatedGray, Silver76395A300000
    6"330.05"Asphalt-40 to 200Not RatedGray, Silver76395A400000
    9"330.05"Asphalt-40 to 200Not RatedSilver76395A1600000
    12"330.05"Asphalt-40 to 200Not RatedSilver76395A18000000
    18"330.05"Asphalt-40 to 200Not RatedSilver76395A21000000
    back to top