McMaster-Carr logo
    Filter by
    For Use With
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Construction
    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)
    248 Products

    Round Caps

    Cover pipe and rods to keep dust and coatings out of threads. These caps also prevent dents and nicks during shipping and storage. Push them onto just about any round object.
    Rubber
    Image of Product. Bottom orientation. Protective Caps. Round Caps, Rubber, High-Temperature Silicone Rubber.

    High-Temperature

    Silicone Rubber

    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating. Caps are flexible to conform to parts.
    For OD
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    0.02"1/2"Flexible570Orange1000000000000000
    0.034"1/2"Flexible570Orange100000000000000
    3/64"3/4"Flexible570Orange100000000000000
    1/16"3/4"Flexible570Orange100000000000000
    5/64"1"Flexible570Orange100000000000000
    3/32"3/4"Flexible570Orange1000000000000000
    0.1"1/2"Flexible570Orange1000000000000000
    7/64"3/4"Flexible570Orange100000000000000
    1/8"1"Flexible570Orange25000000000000
    9/64"1"Flexible570Orange100000000000000
    5/32"1/2"Flexible570Orange100000000000000
    11/64"1"Flexible570Orange25000000000000
    3/16"1"Flexible570Orange1000000000000000
    7/32"1"Flexible570Orange500000000000000
    15/64"1 1/2"Flexible570Orange10000000000000
    1/4"1"Flexible570Orange10000000000000
    9/32"1"Flexible570Orange1000000000000000
    0.295"1 1/2"Flexible570Orange10000000000000
    5/16"1"Flexible570Orange50000000000000
    0.34"1"Flexible570Orange500000000000000
    0.355"1 1/2"Flexible570Orange10000000000000
    3/8"1 1/2"Flexible570Orange5000000000000
    13/32"1"Flexible570Orange500000000000000
    7/16"1"Flexible570Orange250000000000000
    15/32"1"Flexible570Orange250000000000000
    0.48"1 1/2"Flexible570Orange10000000000000
    1/2"1 1/2"Flexible570Orange5000000000000
    0.535"1 1/2"Flexible570Orange10000000000000
    9/16"1 1/2"Flexible570Orange250000000000000
    0.6"1 1/2"Flexible570Orange10000000000000
    5/8"1 1/2"Flexible570Orange5000000000000
    11/16"1 1/2"Flexible570Orange250000000000000
    3/4"1 1/2"Flexible570Orange5000000000000
    13/16"1 1/2"Flexible570Orange5000000000000
    7/8"1 1/2"Flexible570Orange5000000000000
    15/16"1 1/2"Flexible570Orange100000000000000
    31/32"1 1/2"Flexible570Orange5000000000000
    1"1 1/2"Flexible570Orange5000000000000
    1 1/16"1 1/2"Flexible570Orange100000000000000
    1 1/8"1 1/2"Flexible570Orange100000000000000
    1 3/16"1 1/2"Flexible570Orange100000000000000
    1 1/4"1 1/2"Flexible570Orange100000000000000
    1 3/8"1 1/2"Flexible570Orange100000000000000
    1 1/2"1 1/2"Flexible570Orange100000000000000
    1 5/8"1 1/2"Flexible570Orange50000000000000
    1 3/4"2"Flexible570Orange50000000000000
    1 7/8"2"Flexible570Orange50000000000000
    2"2"Flexible570Orange50000000000000
    2 1/2"1 1/2"Flexible570Orange50000000000000
    2 3/4"1 1/2"Flexible570Orange50000000000000
    3 1/2"1 1/2"Flexible570Orange1000000000000
    4"1 3/4"Flexible570Orange10000000000000
     

    Tapered Plugs

    Image of Product. Front orientation. Protective Plugs. Tapered Plugs, High-Temperature Silicone Rubber, 0 Holes.

    High-Temperature

    Silicone Rubber,

    0 Holes

    Don't worry about having the exact size you need on hand—these plugs are shaped to fit a range of diameters. Push in until they're snug to mask holes during coating and finishing.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    0 Holes
    For ID
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    1/32" to 3/64"5/8"570Off-White500000000000000
    1/32" to 3/32"1"570Red50000000000000
    1/32" to 1/8"5/8"570Clear5000000000000
    3/64" to 1/16"3/4"570Off-White500000000000000
    3/64" to 7/64"5/8"570Clear50000000000000
    3/64" to 13/64"1 1/8"570Clear50000000000000
    1/16" to 11/64"3/4"570Red500000000000000
    1/16" to 13/64"3/4"570Clear50000000000000
    5/64" to 7/64"5/8"570Green5000000000000
    5/64" to 11/64"5/8"570Pink50000000000000
    1/8" to 1/2"2"570Red100000000000000
    9/64" to 15/64"3/4"570Black50000000000000
    9/64" to 23/64"1 1/4"570Red25000000000000
    13/64" to 21/64"5/8"570Red50000000000000
    1/4" to 7/16"1"570Red500000000000000
    17/64" to 23/64"3/4"570Yellow2500000000000
    17/64" to 27/64"1"570Clear25000000000000
    9/32" to 23/64"3/4"570Clear500000000000000
    21/64" to 31/64"13/16"570Clear1000000000000
    11/32" to 15/32"3/4"570Clear10000000000000
    11/32" to 1/2"13/16"570Clear10000000000000
    23/64" to 29/64"13/16"570Clear25000000000000
    13/32" to 19/32"1"570Red250000000000000
    27/64" to 37/64"1"570Clear25000000000000
    29/64" to 39/64"13/16"570Green1000000000000
    29/64" to 43/64"1"570Clear10000000000000
    1/2" to 21/32"1"570Pink10000000000000
    33/64" to 41/64"1"570Red25000000000000
    37/64" to 47/64"1"570Black10000000000000
    39/64" to 23/32"1"570Off-White100000000000000
    41/64" to 49/64"1"570Clear10000000000000
    41/64" to 51/64"1"570Red10000000000000
    47/64" to 59/64"1"570Yellow10000000000000
    3/4" to 1"1"570Clear5000000000000
    49/64" to 29/32"1"570Off-White50000000000000
    51/64" to 1"1"570Clear5000000000000
    53/64" to 31/32"1"570Off-White5000000000000
    29/32" to 1 1/16"1"570Red100000000000000
    59/64" to 1 3/64"1"570Clear5000000000000
    61/64" to 1 5/64"1"570Clear50000000000000
    1 3/64" to 1 1/4"1"570Green5000000000000
    1 1/16" to 1 21/64"1"570Red50000000000000
    1 5/64" to 1 7/32"1"570Off-White5000000000000
    1 3/16" to 1 7/16"1"570Blue200000000000
    1 19/64" to 1 1/2"1"570Off-White2000000000000
    1 5/16" to 1 5/8"1"570Clear100000000000
    1 21/64" to 1 19/32"1"570Clear100000000000
    1 15/32" to 1 3/4"1"570Red100000000000
    1 31/64" to 1 3/4"1"570Red100000000000
    1 41/64" to 1 61/64"1"570Clear100000000000
    1 21/32" to 1 15/16"1"570Clear1000000000000
    1 13/16" to 2 1/64"1"570Off-White2000000000000
    1 57/64" to 2 3/16"1"570Purple100000000000
    1 31/32" to 2 15/32"1"570Clear1000000000000
    1 63/64" to 2 15/32"1"570Red1000000000000
    2 9/64" to 2 1/2"1"570Red1000000000000
    2 5/16" to 2 21/32"1"570Clear10000000000000
    2 29/64" to 2 15/16"1 3/8"570Red1000000000000
    3 1/64" to 3 17/32"1 1/2"570Red1000000000000
    3 17/64" to 4 1/32"1 1/2"570Red1000000000000
    3 33/64" to 4 63/64"2"570Red1000000000000
     

    Tapered Caps

    Image of Product. Front orientation. Protective Caps. Tapered Caps.
    Don't worry about having the exact size you need on hand. These caps are shaped to fit a range of ODs—just keep pushing on until they're snug. Because they make less contact with the parts they cover, they’re easier to remove than straight caps. In a pinch, you can flip tapered caps over and use them as plugs.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating. Caps are flexible to conform to parts.
    For OD
    For Pipe
    Size
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    0.111" to 0.177"1/8
    		0.38"Flexible450Red10000000000000
    0.235" to 0.302"1/4
    		0.38"Flexible450Red1000000000000
    0.356" to 0.422"3/8
    		0.38"Flexible450Red1000000000000
    0.468" to 0.545"1/2
    		0.44"Flexible450Red1000000000000
    0.687" to 0.785"3/4
    		0.56"Flexible450Red1000000000000
    0.901" to 1.027"1
    		3/4"Flexible450Red1000000000000
     

    Hollow Tapered Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Hollow Tapered Plugs.
    A hollow construction makes these plugs extra flexible, so they compress for easy installation and a snug fit. The tapered profile fits a range of hole diameters. If you flip the plug over, it can be used as a cap.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    For ID
    For Pipe
    Size
    Ht.
    Max. Temp.,
    ° F
    Color
    Flange
    Dia.
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    0.116" to 0.182"1/8
    		3/8"450Red11/32"10000000000000
    0.24" to 0.295"1/4
    		3/8"450Red15/32"1000000000000
    0.325" to 0.367"1/4
    		3/16"450Red1/2"1000000000000
    0.361" to 0.418"3/8
    		3/8"450Red19/32"1000000000000
    0.471" to 0.536"1/2
    		7/16"450Red23/32"1000000000000
    0.58" to 0.667"1/2
    		1/2"450Red27/32"1000000000000
    0.64" to 0.727"1/2
    		1/2"450Red29/32"1000000000000
    0.69" to 0.788"3/4
    		9/16"450Red31/32"1000000000000
    0.802" to 0.911"3/4
    		5/8"450Red1 3/32"1000000000000
    0.866" to 0.975"3/4
    		5/8"450Red1 5/32"1000000000000
    0.964" to 1.09"1
    		3/4"450Red1 9/32"100000000000
    1.094" to 1.215"1
    		3/4"450Red1 7/16"1000000000000
    1.224" to 1.355"1 1/4
    		3/4"450Red1 17/32"10000000000000
    1.312" to 1.465"1 1/4
    		7/8"450Red1 21/32"500000000000
    1.447" to 1.6"1 1/2
    		7/8"450Red1 25/32"500000000000
    1.56" to 1.682"1 1/2
    		3/4"450Red1 29/32"500000000000
    1 3/4" to 1.88"1 1/2
    		3/4"450Red2 1/32"5000000000000
    1.78" to 1.95"1 1/2
    		1"450Red2 5/32"200000000000
    1.9" to 2.076"2
    		1"450Red2 9/32"200000000000
    2.035" to 2.21"2
    		1"450Red2 3/8"200000000000
    2.255" to 2.43"2
    		1"450Red2 19/32"200000000000
    2.525" to 2.7"2 1/2
    		1"450Red2 27/32"200000000000
    2.765" to 2.94"2 1/2
    		1"450Red3 3/32"200000000000
     

    Pull-Through Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Pull-Through Plugs.
    Fill the entire length of through holes instead of plugging each end. Grip the small end of these plugs and pull through to mask holes during finishing. They’re also good for plugging multiple aligned holes at once.
    Chemical-Resistant EPDM—These plugs won't swell or crack when masking parts during plating, anodizing, and other chemical finishing.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    For
    ID
    Ht.
    Tab
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Chemical-Resistant EPDM
    1/16"3/8"11/32"Not RatedBlack1000000000000000
    1/16"19/32"19/32"Not RatedBlack100000000000000
    1/16"11/16"11/16"Not RatedBlack50000000000000
    1/8"21/32"11/16"Not RatedBlack50000000000000
    5/32"5/8"5/8"Not RatedBlack50000000000000
    3/16"1"1"Not RatedBlack50000000000000
    1/4"15/16"15/16"Not RatedBlack50000000000000
    1/4"1"1"Not RatedBlack50000000000000
    5/16"3/4"1 3/32"Not RatedBlack50000000000000
    11/32"7/8"15/16"Not RatedBlack50000000000000
    3/8"1"1"Not RatedBlack25000000000000
    13/32"1"1"Not RatedBlack25000000000000
    7/16"1"1"Not RatedBlack25000000000000
    15/32"1"1"Not RatedBlack1000000000000
    1/2"1"31/32"Not RatedBlack10000000000000
    1/2"1"1"Not RatedBlack10000000000000
    5/8"1"1"Not RatedBlack10000000000000
    11/16"1 1/4"1 5/16"Not RatedBlack10000000000000
    3/4"1"15/16"Not RatedBlack10000000000000
    7/8"1"1"Not RatedBlack10000000000000
    1"1"31/32"Not RatedBlack10000000000000
     
    High-Temperature Silicone Rubber
    1/16"3/8"5/16"600Clear500000000000
    1/16"5/8"9/16"600Green500000000000
    3/32"11/16"11/16"600Gray250000000000
    1/8"21/32"11/16"600Pink2500000000000
    5/32"5/8"5/8"600Gray2500000000000
    3/16"31/32"29/32"600Clear2500000000000
    1/4"1"31/32"600Green25000000000000
    9/32"15/16"7/8"600Yellow2500000000000
    5/16"3/4"1 1/16"600Blue25000000000000
    11/32"7/8"13/16"600Clear2500000000000
    3/8"1"29/32"600Pink25000000000000
    13/32"1"1"600Green2500000000000
    7/16"1"1"600Gray25000000000000
    15/32"1"1"600Blue25000000000000
    1/2"1"25/32"600Clear10000000000000
    17/32"1"1"600Pink10000000000000
    5/8"1"31/32"600Gray10000000000000
    11/16"1 1/4"1 9/32"600Blue10000000000000
    3/4"1"15/16"600Clear5000000000000
    7/8"1"1"600Green5000000000000
    1"1"15/16"600Yellow5000000000000
     

    Tapered Plugs for Food and Beverage

    Image of Product. Front orientation. Protective Plugs. Tapered Plugs for Food and Beverage.
    Nonporous and super smooth to prevent bacteria growth, these plugs are FDA compliant for use in food production. They’re often used as bottle stoppers to protect liquids from spills and contamination.
    High-Temperature Silicone Rubber—Plugs can be autoclaved and sterilized without cracking or breaking down.
    For ID
    Ht.
    Trade
    Size
    Max. Temp.,
    ° F
    Color
    Specs. Met
    Each
    High-Temperature Silicone Rubber
    29/64" to 37/64"1"00400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI00000000000000
    35/64" to 41/64"1"0400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    39/64" to 23/32"1"1400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    43/64" to 23/32"1"2400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    49/64" to 29/32"1"3400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    51/64" to 31/32"1"4400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    59/64" to 1"1"5400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    1 5/64" to 1 7/32"1"6400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    1 9/64" to 1 13/32"1"7400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    1 21/64" to 1 9/16"1"8400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    1 17/32" to 1 45/64"1"9400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
    1 23/32" to 1 59/64"1"10400Semi-Clear WhiteFDA Compliant 21 CFR 177.2600, USP Class VI0000000000000
     

    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
     

    No-Spill Caps

    Image of Product. Front orientation. Protective Caps. No-Spill Caps.
    Even if beakers, bottles, and flasks are tipped upside down, liquids stay sealed inside. Tug on the tabs to stretch these caps over openings. Not only are they safer and more secure than foil or film covers, they can be used again and again. Autoclave to sterilize, or just toss in the dishwasher.
    High-Temperature Silicone Rubber—These caps withstand temperatures up to 350° F as well as exposure to chemicals such as acetone and isopropyl alcohol.
    For OD
    Flexibility
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    1 11/16" to 2 3/8"Flexible350Blue1000000000000
    1 11/16" to 2 3/8"Flexible350Green100000000000
    1 11/16" to 2 3/8"Flexible350Pink100000000000
    2 1/2" to 3"Flexible350Blue100000000000
    2 1/2" to 3"Flexible350Green100000000000
    2 1/2" to 3"Flexible350Pink100000000000
    3 5/16" to 4 9/16"Flexible350Blue100000000000
    3 5/16" to 4 9/16"Flexible350Green100000000000
    3 5/16" to 4 9/16"Flexible350Pink100000000000
     

    Vented Plugs for Pipe and Tubing

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. For Pipe, For Round Holes, Vented, For Round Shapes, Push In.
    Keep coatings out of female threaded pipe and release pressure while they cure. Push in these plugs and a rib holds them in place. Tear away the tab to vent.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    Pipe
    Size
    For Thread
    Type
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    External Square Drive
     
    High-Temperature Silicone Rubber
    1/2
    		NPT
    		19/32"600Pink100000000000000
    3/4
    		NPT
    		19/32"600Yellow10000000000000
    1
    		NPT
    		11/16"600Clear100000000000
    1 1/4
    		NPT
    		3/4"600Green100000000000
    1 1/2
    		NPT
    		23/32"600White100000000000
    2
    		NPT
    		23/32"600Blue100000000000
     

    Pull-Through Plugs for Countersunk Holes

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Pull-Through Plugs for Countersunk Holes.
    Simplify masking countersunk holes. A flanged design protects both the center and countersunk portions of holes with a single plug.
    High-Temperature Silicone Rubber—Withstand multiple passes when paint baking, powder coating, and electroplating.
    For
    ID
    Ht.
    Max. Temp.,
    ° F
    Color
    Flange
    Dia.
    Pkg.
    Qty.
    Pkg.
    High-Temperature Silicone Rubber
    3/32"3/8"600Blue13/32"10000000000000
    1/8"3/8"600Green13/32"1000000000000
    5/32"3/8"600Pink1/2"1000000000000
    3/16"3/8"600Clear13/32"1000000000000
    3/16"3/8"600Yellow9/16"1000000000000
    7/32"3/8"600Green5/8"1000000000000
    7/32"3/8"600White19/32"1000000000000
    9/32"3/8"600Clear11/16"10000000000000
    9/32"3/8"600Gray19/32"10000000000000
    11/32"3/8"600Gray13/16"10000000000000
    3/8"3/8"600Yellow25/32"10000000000000
    13/32"3/8"600White15/16"10000000000000
    7/16"3/8"600Pink25/32"10000000000000
    15/32"3/8"600Blue1 1/16"10000000000000
     
    back to top