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    7 Products

    End Type

    Loop 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.
    Double-Loop End—Ends are strengthened by an extra loop, so these springs are less likely to break if overstretched.
    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.
     
    Corrosion-Resistant 302 Stainless Steel
    16"1.031"0.105"28.49"6.7823.941.39194135K839000000
     
    Double-Loop End
    Image of Product. Front orientation. Contains Border, MultipleImages. Extension Springs. Double-Loop End.
     
    Spring Steel
    16"0.296"0.041"17"22.640.6411330K1220000
    16"0.344"0.047"18"1.993.670.8411330K12300000
    16"0.421"0.062"17"4.76.92.211330K12500000
     
    Hook End
    Image of Product. Front orientation. Extension Springs. Hook End.
     
    Corrosion-Resistant 302 Stainless Steel
    16"0.5"0.054"36"29.90.4219433K55200000
     

    Overload-Prevention Extension Springs

    Image of Product. Front orientation. Extension Springs. Overload-Prevention Extension Springs.
    Stop overstretching before it starts—drawbars limit how far these springs extend to prevent breaking. They’re best for tensioning tasks, such as pulling and keeping fences and gates closed.
    Loop End—The most secure attachment method. With fully closed loops, there's no risk of slipping off.
    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
    Lg.
    OD
    Wire
    Dia.
    Extended Lg.
    @ Max. Load
    Min.
    Max.,
    lb.
    Spring Rate,
    lbf/in
    Each
    Loop End
     
    Spring Steel
    16"1.87"0.135"21"Not Rated38.097.629630K35000000
     
    Corrosion-Resistant 302 Stainless Steel
    16"1.87"0.135"21"Not Rated38.097.629630K7500000
     
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