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    27 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.
    Highly Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant stainless steel springs won't degrade when exposed to salt water and harsh chemicals. They're 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
    355.44.60.490.820.03ClosedDIN 2095500000000000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
    355.44.60.415.60.60.03Closed—1000000000000
    355.994.370.8124.14.10.38Closed and Ground—100000000000
    355.994.970.511710.05Closed and Ground—1000000000000
    357.495.610.97245.50.46Closed and Ground—1000000000000
    357.495.870.8121.53.30.25Closed and Ground—1000000000000
    357.496.170.6620.11.80.12Closed and Ground—1000000000000
    357.496.370.5618.31.10.06Closed and Ground—1000000000000
    358.997.670.6618.71.50.09Closed and Ground—1000000000000
    3510.88.21.322.890.74Closed and Ground—1000000000000
    3510.89.020.8918.630.18Closed and Ground—1000000000000
    3511.999.191.422100.78Closed and Ground—1000000000000
    3511.9910.110.9720.43.50.21Closed and Ground—1000000000000
    3513.5111.331.0916.24.50.24Closed and Ground—1000000000000
    3515.0111.811.621.1120.86Closed and Ground—1000000000000
    3515.0112.631.1913.85.20.24Closed and Ground—100000000000
    3518.2914.272.0322.7191.5Closed and Ground—1000000000000
    3518.2915.491.4186.80.4Closed and Ground—1000000000000
     

    Extension Springs

    Image of Product. Front orientation. Extension Springs. Loop End.

    Loop End

    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.
    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
     
    Spring Steel
    3570.63101.50.282.740.04200000000000000
     
    Corrosion-Resistant 302 Stainless Steel
    3570.63101.50.282.280.0320000000000000
     

    Coiled Spring Pins

    Image of Product. Front orientation. Spring Pins. Coiled Spring Pins.
    Image of Product. End View. Side1 orientation. Spring Pins. Coiled Spring Pins.

    End View

    The best spring pins for joining parts exposed to vibration and shock. They're often used in power transmission, automation, and other assemblies with constant motion and sudden starts and stops. Because of their spiral shape, they flex to conform to holes that aren’t perfectly round.
    Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.
    Corrosion-Resistant 18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.
    Lg.,
    mm
    For Hole
    Dia., mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Spring Steel
     
    4 mm Diameter
    354.000 to 4.1002,100Rockwell C43DIN 7343, ISO 875025000000000000000
     
    5 mm Diameter
    355.000 to 5.1003,300Rockwell C43DIN 7343, ISO 87502500000000000000
     
    6 mm Diameter
    356.000 to 6.1004,900Rockwell C43DIN 7343, ISO 875050000000000000
     
    8 mm Diameter
    358.000 to 8.2008,700Rockwell C43ISO 8750500000000000000
     
    Corrosion-Resistant 18-8 Stainless Steel
     
    4 mm Diameter
    354.000 to 4.1001,700Not RatedDIN 7343, ISO 87501000000000000000
     
    5 mm Diameter
    355.000 to 5.1002,500Not RatedDIN 7343, ISO 8750500000000000000
     
    6 mm Diameter
    356.000 to 6.1003,700Not RatedDIN 7343, ISO 8750500000000000000
     
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