McMaster-Carr logo
    Filter by
    System of Measurement
    Length
    Compression Spring Type
    Hole Diameter
    Compressed Length @ Maximum Load
    Attribute Image
    Extended Length @ Maximum Load
    Attribute Image
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Maximum Temperature
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Minimum Load
    Specifications Met
    Hook Type
    Thread Size
    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)
    11 Products

    Compression Springs

    Image of Product. Front orientation. Compression Springs.
    Squeeze these springs and they’ll push right back to their original length. When compressed, they apply steady pressure to keep components securely in place. Release the pressure and they snap back instantly, just like the tip of a ballpoint pen.
    Corrosion-Resistant 302 Stainless Steel—Won’t corrode from exposure to moisture and mild chemicals, including ammonia often found in cleaning solutions. These springs are easier to compress than steel, but can’t handle as high a load.
    Lg.,
    mm
    OD,
    mm
    ID,
    mm
    Wire Dia.,
    mm
    Compressed Lg. @
    Max. Load, mm
    Max. Load,
    lb.
    Spring Rate,
    lbf/mm
    End Type
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Corrosion-Resistant 302 Stainless Steel
    4118.513.52.520.5683.3Closed and GroundDIN 209522006N345000000
    412218213.6291.1Closed and GroundDIN 209552006N34400000
    412921422.91558.9Closed and GroundDIN 209512006N34600000
    413020527.629022Closed and GroundDIN 209512006N34700000
     

    Extension Springs

    The farther you stretch these springs, the harder they pull to bring the two ends back together. They're commonly used to tension cable, return an air cylinder to its starting point, or hold a door closed.
    Loop End—The most secure attachment method. With fully closed loops, there's no risk of slipping off.
    Hook End—Hook into closed holes, such as hanger bolt eyes. These springs work best when kept under tension, as they're more likely to slip off than loop-end springs when tension is released. Also known as machine hook ends.
    Spring Steel—Strong and resilient, but best suited for dry environments since moisture will cause these springs to rust.
    Corrosion-Resistant 302 Stainless Steel—Won’t corrode from exposure to moisture and mild chemicals, including ammonia often found in cleaning solutions. These springs are easier to extend than steel, but can’t handle as high a load.
    Minimum Load—The amount of force required to start extending the spring.
    Maximum Load—The amount of force required to fully extend the spring.
    Load,
    lb.
    Lg.,
    mm
    OD,
    mm
    Wire Dia.,
    mm
    Extended Lg.
    @ Max. Load, mm
    Min.
    Max.
    Spring Rate,
    lbf/mm
    Pkg.
    Qty.
    Pkg.
    Loop End
    Image of Product. Front orientation. Extension Springs. Loop End.
     
    Spring Steel
    418.51.265.62.5914.120.4923630N21000000
     
    Hook End
    Image of Product. Front orientation. Extension Springs. Hook End.
     
    Spring Steel
    418.51.265.62.5914.110.4927678N29300000
     
    Corrosion-Resistant 302 Stainless Steel
    418.51.265.62.5911.760.4121942N48300000
     

    Extension Spring Stud Anchors

    Image of Product. Front orientation. Contains Annotated. Hanger Bolts. Extension Spring Stud Anchors.
    A black-oxide finish provides these steel anchors with mild corrosion resistance. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Each
    Black-Oxide Steel
    M10 × 1.5 mm28Coarse
    		411069634K4300000
     

    Corrosion-Resistant Extension Spring Stud Anchors

    Image of Product. Front orientation. Contains Annotated. Hanger Bolts. Corrosion-Resistant Extension Spring Stud Anchors.
    These stainless steel stud anchors offer excellent corrosion resistance. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Each
    18-8 Stainless Steel
    M10 × 1.5 mm28Coarse
    		4110695907A210000000
     

    Corrosion-Resistant Swiveling Extension Spring Stud Anchors

    Image of Product. Front orientation. Contains Annotated. Hanger Bolts. Corrosion-Resistant Swiveling Extension Spring Stud Anchors.
    These stainless steel stud anchors offer excellent corrosion resistance. The head swivels 360° so the spring stays straight and properly coiled. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection. To make tightening easier, anchors have a hex socket on the bottom and wrench flats at the top of the threads.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Hex Size,
    mm
    Each
    18-8 Stainless Steel
    M10 × 1.5 mm28Coarse
    		41106396376A610000000
     

    Swiveling Extension Spring Stud Anchors

    Image of Product. Front orientation. Contains Annotated. Hanger Bolts. Swiveling Extension Spring Stud Anchors.
    A black-oxide finish provides these steel anchors with mild corrosion resistance. The head swivels 360° so the spring stays straight and properly coiled. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection. To make tightening easier, anchors have a hex socket on the bottom and wrench flats at the top of the threads.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Hex Size,
    mm
    Each
    Black-Oxide Steel
    M10 × 1.5 mm28Coarse
    		41106397745A210000000
     
    back to top