McMaster-Carr logo
    Filter by
    System of Measurement
    Shape
    Thickness
    Attribute Image
    Mount Type
    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.
    1-9
    10-Up
    Aluminum
     
    3/8" OD
    1/16"No. 12
    		0.218"—0000000000000000000
    1/8"No. 12
    		0.218"—00000000000000000
    5/32"No. 12
    		0.218"—00000000000000000
    3/16"No. 12
    		0.218"—00000000000000000
    7/32"No. 12
    		0.218"—00000000000000000
    1/4"No. 12
    		0.218"—00000000000000000
    9/32"No. 12
    		0.218"—00000000000000000
    5/16"No. 12
    		0.218"—00000000000000000
    11/32"No. 12
    		0.218"—00000000000000000
    3/8"No. 12
    		0.218"—00000000000000000
    13/32"No. 12
    		0.218"—00000000000000000
    7/16"No. 12
    		0.218"—00000000000000000
    15/32"No. 12
    		0.218"—00000000000000000
    1/2"No. 12
    		0.218"—00000000000000000
    9/16"No. 12
    		0.218"—00000000000000000
    5/8"No. 12
    		0.218"—00000000000000000
    11/16"No. 12
    		0.218"—00000000000000000
    3/4"No. 12
    		0.218"—00000000000000000
    13/16"No. 12
    		0.218"—00000000000000000
    7/8"No. 12
    		0.218"—00000000000000000
    15/16"No. 12
    		0.218"—00000000000000000
    1"No. 12
    		0.218"—00000000000000000
    1 1/8"No. 12
    		0.218"—00000000000000000
    1 3/16"No. 12
    		0.218"—00000000000000000
    1 1/4"No. 12
    		0.218"—00000000000000000
    1 5/16"No. 12
    		0.218"—00000000000000000
    1 3/8"No. 12
    		0.218"—00000000000000000
    1 7/16"No. 12
    		0.218"—00000000000000000
    1 1/2"No. 12
    		0.218"—00000000000000000
    1 3/4"No. 12
    		0.218"—00000000000000000
    2"No. 12
    		0.218"—00000000000000000
    2 1/4"No. 12
    		0.218"—00000000000000000
    2 1/2"No. 12
    		0.218"—00000000000000000
     
    Black Anodized Aluminum
     
    3/8" OD
    1/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1/4"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    3/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1/2"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    5/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    3/4"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    7/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1 1/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1 1/4"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1 3/8"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1 1/2"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    1 3/4"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
    2"No. 12
    		0.218"MIL-A-8625 Type II Class 200000000000000000
     

    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 A5820000000000000000000
    1/8"No. 12
    		0.218"ASTM A58200000000000000000
    5/32"No. 12
    		0.218"ASTM A58200000000000000000
    3/16"No. 12
    		0.218"ASTM A58200000000000000000
    7/32"No. 12
    		0.218"ASTM A58200000000000000000
    1/4"No. 12
    		0.218"ASTM A58200000000000000000
    9/32"No. 12
    		0.218"ASTM A58200000000000000000
    5/16"No. 12
    		0.218"ASTM A58200000000000000000
    11/32"No. 12
    		0.218"ASTM A58200000000000000000
    3/8"No. 12
    		0.218"ASTM A58200000000000000000
    13/32"No. 12
    		0.218"ASTM A58200000000000000000
    7/16"No. 12
    		0.218"ASTM A58200000000000000000
    15/32"No. 12
    		0.218"ASTM A58200000000000000000
    1/2"No. 12
    		0.218"ASTM A58200000000000000000
    9/16"No. 12
    		0.218"ASTM A58200000000000000000
    5/8"No. 12
    		0.218"ASTM A58200000000000000000
    11/16"No. 12
    		0.218"ASTM A58200000000000000000
    3/4"No. 12
    		0.218"ASTM A58200000000000000000
    13/16"No. 12
    		0.218"ASTM A58200000000000000000
    7/8"No. 12
    		0.218"ASTM A58200000000000000000
    15/16"No. 12
    		0.218"ASTM A58200000000000000000
    1"No. 12
    		0.218"ASTM A58200000000000000000
    1 1/8"No. 12
    		0.218"ASTM A58200000000000000000
    1 3/16"No. 12
    		0.218"ASTM A58200000000000000000
    1 1/4"No. 12
    		0.218"ASTM A58200000000000000000
    1 5/16"No. 12
    		0.218"ASTM A58200000000000000000
    1 3/8"No. 12
    		0.218"ASTM A58200000000000000000
    1 7/16"No. 12
    		0.218"ASTM A58200000000000000000
    1 1/2"No. 12
    		0.218"ASTM A58200000000000000000
    1 3/4"No. 12
    		0.218"ASTM A581/A58200000000000000000
    2"No. 12
    		0.218"ASTM A581/A58200000000000000000
    2 1/4"No. 12
    		0.218"ASTM A5820000000000000000000
    2 1/2"No. 12
    		0.218"ASTM A5820000000000000000000
     

    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 200000000000000000
     

    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"0000000000000000000
    5/32"No. 12
    		0.218"00000000000000000
    3/16"No. 12
    		0.218"00000000000000000
    7/32"No. 12
    		0.218"00000000000000000
    1/4"No. 12
    		0.218"00000000000000000
    9/32"No. 12
    		0.218"00000000000000000
    5/16"No. 12
    		0.218"00000000000000000
    11/32"No. 12
    		0.218"00000000000000000
    3/8"No. 12
    		0.218"00000000000000000
    13/32"No. 12
    		0.218"00000000000000000
    7/16"No. 12
    		0.218"00000000000000000
    15/32"No. 12
    		0.218"00000000000000000
    1/2"No. 12
    		0.218"00000000000000000
    9/16"No. 12
    		0.218"00000000000000000
    5/8"No. 12
    		0.218"00000000000000000
    11/16"No. 12
    		0.218"00000000000000000
    3/4"No. 12
    		0.218"00000000000000000
    13/16"No. 12
    		0.218"00000000000000000
    7/8"No. 12
    		0.218"00000000000000000
    15/16"No. 12
    		0.218"00000000000000000
    1"No. 12
    		0.218"00000000000000000
    1 1/8"No. 12
    		0.218"00000000000000000
    1 3/16"No. 12
    		0.218"00000000000000000
    1 1/4"No. 12
    		0.218"00000000000000000
    1 3/8"No. 12
    		0.218"00000000000000000
    1 7/16"No. 12
    		0.218"00000000000000000
    1 1/2"No. 12
    		0.218"00000000000000000
    1 3/4"No. 12
    		0.218"00000000000000000
    2"No. 12
    		0.218"00000000000000000
    2 1/4"No. 12
    		0.218"00000000000000000
    2 1/2"No. 12
    		0.218"00000000000000000
     

    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
    		25000000000000000
     
    1" OD
    1/8"1 7/64"No. 12
    		0.250"-20 to 155UL 94 V-2
    		2500000000000000
     

    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-White25000000000000000
    7/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2500000000000000
    9/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2500000000000000
    11/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2500000000000000
    13/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2500000000000000
    15/32"No. 12
    		0.218"-40 to 185ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White2500000000000000
    1 1/8"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    1 3/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    1 5/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    1 3/8"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    1 7/16"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    1 3/4"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    2"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White500000000000000
    2 1/4"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White100000000000000
    2 1/2"No. 12
    		0.218"-30 to 250ASTM D4066, ASTM D6779UL 94 V-2
    		Off-White100000000000000
     

    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-White100000000000000000
    No. 12
    		0.236"0.315"0.240"0.480"0.079"0.315"-40180Off-White10000000000000000
     
    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-White2500000000000000
    No. 12
    		0.125"0.254"0.220"0.330"0.225"-40180Off-White2500000000000000
    No. 12
    		0.250"0.254"0.220"0.330"0.350"-40180Off-White2500000000000000
    No. 12
    		1.000"0.254"0.220"0.330"1.100"-40180Off-White2500000000000000
     

    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 B160000000000000000000
    5/32"No. 12
    		0.218"ASTM B1600000000000000000
    3/16"No. 12
    		0.218"ASTM B1600000000000000000
    1/4"No. 12
    		0.218"ASTM B1600000000000000000
    5/16"No. 12
    		0.218"ASTM B1600000000000000000
    3/8"No. 12
    		0.218"ASTM B1600000000000000000
    7/16"No. 12
    		0.218"ASTM B1600000000000000000
    1/2"No. 12
    		0.218"ASTM B1600000000000000000
    9/16"No. 12
    		0.218"ASTM B1600000000000000000
    5/8"No. 12
    		0.218"ASTM B1600000000000000000
    3/4"No. 12
    		0.218"ASTM B1600000000000000000
    7/8"No. 12
    		0.218"ASTM B1600000000000000000
    1"No. 12
    		0.218"ASTM B1600000000000000000
     
    back to top