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    11 Products

    End Type

    Performance

    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.
    OD
    Wire
    Dia.
    Extended Lg.
    @ Max. Load
    Min.
    Max.
    Spring Rate,
    lbf/in
    Pkg.
    Qty.
    Pkg.
    Loop End
    Image of Product. Front orientation. Extension Springs. Loop End.
     
    Spring Steel
    4.75"0.85"0.075"13.15"2212.318594N14800000
    4.75"0.85"0.085"9.99"2.425.94.525108N73700000
     
    Corrosion-Resistant 302 Stainless Steel
    4.75"0.688"0.091"6.78"8.8729.4310.11194135K8080000
    4.75"0.85"0.085"9.45"2203.819065K69300000
    4.75"0.85"0.085"9.99"221.573.7517749N74400000
     
    Hook End
    Image of Product. Side1 orientation. Extension Springs. Hook End.
     
    Spring Steel
    4.75"0.85"0.085"9.99"2.425.94.525667N20400000
     
    Corrosion-Resistant 302 Stainless Steel
    4.75"0.5"0.054"10.05"29.91.5819433K57600000
    4.75"0.5"0.072"7.15"5237.5219433K57700000
    4.75"0.85"0.085"9.99"221.573.7511942N87100000
    4.75"0.875"0.075"10.25"1.712.7219433K34200000
    4.75"0.875"0.085"8.74"2.4183.9119433K34800000
     
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