McMaster-Carr logo
    Filter by
    System of Measurement
    Shape
    Mount Type
    Thickness
    Attribute Image
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Tube OD
    Attribute Image
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Washer Type
    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)
    148 Products

    Aluminum Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Aluminum Unthreaded Spacers.
    Your go-to metal spacers. One-third the weight of steel, these aluminum spacers are commonly used in applications that have weight limits. They're an alternative to stainless steel for rust resistance, but aren't as strong.
    Black Anodized Aluminum—The dark black anodized finish adds an extra layer of corrosion resistance.
    Military Specification—These spacers are manufactured and tested to meet strict U.S. military standards for material and construction.
    Each
    Lg.
    For Screw
    Size
    ID
    Mil. Spec.
    1-24
    25-99
    100-Up
    Aluminum
     
    3/8" OD
    1/16"No. 12
    		0.218"—92510A393000000000000000
    1/8"No. 12
    		0.218"—92510A660000000000000
    5/32"No. 12
    		0.218"—92510A258000000000000
    3/16"No. 12
    		0.218"—92510A661000000000000
    7/32"No. 12
    		0.218"—92510A262000000000000
    1/4"No. 12
    		0.218"—92510A662000000000000
    9/32"No. 12
    		0.218"—92510A266000000000000
    5/16"No. 12
    		0.218"—92510A663000000000000
    11/32"No. 12
    		0.218"—92510A270000000000000
    3/8"No. 12
    		0.218"—92510A664000000000000
    13/32"No. 12
    		0.218"—92510A274000000000000
    7/16"No. 12
    		0.218"—92510A278000000000000
    15/32"No. 12
    		0.218"—92510A282000000000000
    1/2"No. 12
    		0.218"—92510A665000000000000
    9/16"No. 12
    		0.218"—92510A286000000000000
    5/8"No. 12
    		0.218"—92510A666000000000000
    11/16"No. 12
    		0.218"—92510A290000000000000
    3/4"No. 12
    		0.218"—92510A667000000000000
    13/16"No. 12
    		0.218"—92511A001000000000000
    7/8"No. 12
    		0.218"—92510A668000000000000
    15/16"No. 12
    		0.218"—92511A005000000000000
    1"No. 12
    		0.218"—92510A669000000000000
    1 1/8"No. 12
    		0.218"—92511A009000000000000
    1 3/16"No. 12
    		0.218"—92511A013000000000000
    1 1/4"No. 12
    		0.218"—92510A670000000000000
    1 5/16"No. 12
    		0.218"—92511A017000000000000
    1 3/8"No. 12
    		0.218"—92511A021000000000000
    1 7/16"No. 12
    		0.218"—92511A025000000000000
    1 1/2"No. 12
    		0.218"—92510A671000000000000
    1 3/4"No. 12
    		0.218"—92511A029000000000000
    2"No. 12
    		0.218"—92511A033000000000000
    2 1/4"No. 12
    		0.218"—92510A435000000000000
    2 1/2"No. 12
    		0.218"—92510A439000000000000
     
    Black Anodized Aluminum
     
    3/8" OD
    1/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A761000000000000
    1/4"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A765000000000000
    3/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A769000000000000
    1/2"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A773000000000000
    5/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A775000000000000
    3/4"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A777000000000000
    7/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A779000000000000
    1"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A781000000000000
    1 1/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A782000000000000
    1 1/4"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A783000000000000
    1 3/8"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A785000000000000
    1 1/2"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A787000000000000
    1 3/4"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A788000000000000
    2"No. 12
    		0.218"MIL-A-8625 Type II Class 293013A789000000000000
     

    Stainless Steel Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Stainless Steel Unthreaded Spacers.
    The most corrosion-resistant spacers we offer. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these spacers resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
    Each
    Lg.
    For Screw
    Size
    ID
    Specs. Met
    1-9
    10-Up
    18-8 Stainless Steel
     
    3/8" OD
    1/16"No. 12
    		0.218"ASTM A58292320A2970000000000
    1/8"No. 12
    		0.218"ASTM A58292320A56000000000
    5/32"No. 12
    		0.218"ASTM A58292320A80600000000
    3/16"No. 12
    		0.218"ASTM A58292320A56100000000
    7/32"No. 12
    		0.218"ASTM A58292320A81000000000
    1/4"No. 12
    		0.218"ASTM A58292320A56200000000
    9/32"No. 12
    		0.218"ASTM A58292320A81400000000
    5/16"No. 12
    		0.218"ASTM A58292320A56300000000
    11/32"No. 12
    		0.218"ASTM A58292320A81800000000
    3/8"No. 12
    		0.218"ASTM A58292320A56400000000
    13/32"No. 12
    		0.218"ASTM A58292320A82200000000
    7/16"No. 12
    		0.218"ASTM A58292320A82600000000
    15/32"No. 12
    		0.218"ASTM A58292320A83000000000
    1/2"No. 12
    		0.218"ASTM A58292320A56500000000
    9/16"No. 12
    		0.218"ASTM A58292320A83400000000
    5/8"No. 12
    		0.218"ASTM A58292320A56600000000
    11/16"No. 12
    		0.218"ASTM A58292320A83800000000
    3/4"No. 12
    		0.218"ASTM A58292320A56700000000
    13/16"No. 12
    		0.218"ASTM A58292320A84200000000
    7/8"No. 12
    		0.218"ASTM A58292320A56800000000
    15/16"No. 12
    		0.218"ASTM A58292320A84600000000
    1"No. 12
    		0.218"ASTM A58292320A56900000000
    1 1/8"No. 12
    		0.218"ASTM A58292320A85000000000
    1 3/16"No. 12
    		0.218"ASTM A58292320A85400000000
    1 1/4"No. 12
    		0.218"ASTM A58292320A57000000000
    1 5/16"No. 12
    		0.218"ASTM A58292320A85800000000
    1 3/8"No. 12
    		0.218"ASTM A58292320A86200000000
    1 7/16"No. 12
    		0.218"ASTM A58292320A86600000000
    1 1/2"No. 12
    		0.218"ASTM A58292320A57100000000
    1 3/4"No. 12
    		0.218"ASTM A581/A58292320A87000000000
    2"No. 12
    		0.218"ASTM A581/A58292320A87400000000
    2 1/4"No. 12
    		0.218"ASTM A58292320A004000000000
    2 1/2"No. 12
    		0.218"ASTM A58292320A314000000000
     

    Vibration Damping Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Vibration Damping Unthreaded Spacers.
    Compress between components to absorb vibration, shock, and sound. Made from rubber, these spacers stay flexible under pressure and wide temperature swings. Avoid using them outdoors to prevent cracking.
    Oil-Resistant Fabric-Reinforced Buna-N—Our most oil-resistant spacers won't swell or soften when exposed to oil, grease, or fuel.
    Lg.
    For Screw
    Size
    ID
    Temp. Range,
    ° F
    Each
    Oil-Resistant Fabric-Reinforced Buna-N
     
    1/2" OD
    1"No. 12
    		0.250"-65 to 20099025A120000000
     

    Steel Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Steel Unthreaded Spacers.
    Our strongest spacers take on your heavy loads and high-stress setups.
    Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
    Each
    Lg.
    For Screw
    Size
    ID
    1-9
    10-Up
    Zinc-Plated Steel
     
    3/8" OD
    1/8"No. 12
    		0.218"92415A7600000000000
    5/32"No. 12
    		0.218"92415A03700000000
    3/16"No. 12
    		0.218"92415A76100000000
    7/32"No. 12
    		0.218"92415A04100000000
    1/4"No. 12
    		0.218"92415A76200000000
    9/32"No. 12
    		0.218"92415A04500000000
    5/16"No. 12
    		0.218"92415A76300000000
    11/32"No. 12
    		0.218"92415A04900000000
    3/8"No. 12
    		0.218"92415A76400000000
    13/32"No. 12
    		0.218"92415A05300000000
    7/16"No. 12
    		0.218"92415A05700000000
    15/32"No. 12
    		0.218"92415A06100000000
    1/2"No. 12
    		0.218"92415A76500000000
    9/16"No. 12
    		0.218"92415A06500000000
    5/8"No. 12
    		0.218"92415A76600000000
    11/16"No. 12
    		0.218"92415A06900000000
    3/4"No. 12
    		0.218"92415A76700000000
    13/16"No. 12
    		0.218"92415A07300000000
    7/8"No. 12
    		0.218"92415A76800000000
    15/16"No. 12
    		0.218"92415A07700000000
    1"No. 12
    		0.218"92415A76900000000
    1 1/8"No. 12
    		0.218"92415A08100000000
    1 3/16"No. 12
    		0.218"92415A08500000000
    1 1/4"No. 12
    		0.218"92415A77000000000
    1 3/8"No. 12
    		0.218"92415A09300000000
    1 7/16"No. 12
    		0.218"92415A09700000000
    1 1/2"No. 12
    		0.218"92415A77100000000
    1 3/4"No. 12
    		0.218"92414A40100000000
    2"No. 12
    		0.218"92414A40500000000
    2 1/4"No. 12
    		0.218"92415A90400000000
    2 1/2"No. 12
    		0.218"92415A90800000000
     

    Unthreaded Spacers for Tubes

    Image of ProductInUse. Front orientation. Spacers. Unthreaded Spacers for Tubes.
    Image of Product. Front orientation. Contains Annotated. Spacers. Unthreaded Spacers for Tubes.
    Create secure connections without crushing tubes or pipes. These curved-end spacers hug round surfaces to reinforce tube ends when bolts are tightened through hollow sections. Also known as saddle washers.
    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 Tube
    OD
    For Screw
    Size
    ID
    Temp. Range,
    ° F
    Flammability
    Rating
    Pkg.
    Qty.
    Pkg.
    Nylon 6/6
     
    53/64" OD
    1/2"1"No. 12
    		0.218"-20 to 155UL 94 V-2
    		2592842A300000000
     
    1" OD
    1/8"1 7/64"No. 12
    		0.250"-20 to 155UL 94 V-2
    		2592842A60000000
     

    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
     
    3/8" OD
    5/32"No. 12
    		0.219"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A56000000
    7/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A5650000
    9/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A57700000
    11/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A58200000
    13/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A58700000
    15/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2594639A5920000
    1 1/8"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A21500000
    1 3/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A21900000
    1 5/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A22300000
    1 3/8"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A22700000
    1 7/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A23100000
    1 3/4"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A23500000
    2"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White594638A23900000
    2 1/4"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White194639A0040000
    2 1/2"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White194639A0080000
     

    Brass Unthreaded Spacers

    Image of Product. Front orientation. Spacers. Brass Unthreaded Spacers.
    Conductive and nonmagnetic, these brass spacers are our top choice for electrical equipment. They're commonly used to mount circuit boards and sensors. They also won't rust in damp environments.
    Zinc-Plated Brass—The zinc plating offers better corrosion resistance than plain brass to stand up to solvents, salt water, and chemicals.
    Each
    Lg.
    For Screw
    Size
    ID
    Specs.
    Met
    1-9
    10-Up
    Zinc-Plated Brass
     
    3/8" OD
    1/8"No. 12
    		0.218"ASTM B1690309A1770000000000
    5/32"No. 12
    		0.218"ASTM B1690309A73600000000
    3/16"No. 12
    		0.218"ASTM B1690309A17800000000
    1/4"No. 12
    		0.218"ASTM B1690309A17900000000
    5/16"No. 12
    		0.218"ASTM B1690309A18000000000
    3/8"No. 12
    		0.218"ASTM B1690309A18100000000
    7/16"No. 12
    		0.218"ASTM B1690309A75600000000
    1/2"No. 12
    		0.218"ASTM B1690309A18200000000
    9/16"No. 12
    		0.218"ASTM B1690309A76400000000
    5/8"No. 12
    		0.218"ASTM B1690309A18300000000
    3/4"No. 12
    		0.218"ASTM B1690309A18400000000
    7/8"No. 12
    		0.218"ASTM B1690309A18500000000
    1"No. 12
    		0.218"ASTM B1690309A18600000000
     

    Insulating Sleeve Washers

    Cover screw threads to stop electrical current in its tracks and prevent short circuits. These washers create a barrier between the screw threads and the mating surface when mounted in through holes. This barrier also extends the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.
    Flat Edge
    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washers, Flat Edge.
    The flat edge distributes weight evenly to take pressure off screw heads.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Sleeve
    Temp.
    Range, ° F
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Thk.
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 12
    		0.187"0.240"0.220"0.408"0.062"0.249"-40180Off-White10091145A243000000
    No. 12
    		0.236"0.315"0.240"0.480"0.079"0.315"-40180Off-White10091145A24400000
     
    Rolled Edge for Sealing
    Image of Product. Front orientation. Insulating Washers. Insulating Sleeve Washers, Rolled Edge.
    The rolled edge compresses into the screw threads as you tighten, sealing out dirt, oil, and other contaminants.
    Nylon—Our most versatile insulating washers, these block unwanted current in everything from switches and circuit breakers to control panels and electric motors.
    Sleeve
    Temp.
    Range, ° F
    For Screw
    Size
    Ht.
    OD
    ID
    OD
    Overall
    Ht.
    Min.
    Max.
    Color
    Pkg.
    Qty.
    Pkg.
    Nylon
    No. 12
    		0.025"0.254"0.220"0.330"0.125"-40180Off-White2590097A19000000
    No. 12
    		0.125"0.254"0.220"0.330"0.225"-40180Off-White2590097A13700000
    No. 12
    		0.250"0.254"0.220"0.330"0.350"-40180Off-White2590097A13800000
    No. 12
    		1.000"0.254"0.220"0.330"1.100"-40180Off-White2590097A14200000
     
    back to top