McMaster-Carr logo
    Filter by
    System of Measurement
    Length
    Attribute Image
    Compression Spring Type
    Extended Length @ Maximum Load
    Attribute Image
    DFARS Specialty Metals
    Industrial Info Compare
    Maximum Temperature
    Minimum Load
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Hook 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)
    56 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
    102.391.580.4171.50.5Closed—52006N121000000
    102.491.880.35.40.690.15Closed—52006N12500000
    102.822.180.324.40.880.16ClosedDIN 209552006N19900000
    104.53.50.55.11.70.34ClosedDIN 209552006N20100000
    107.35.317.36.32.2Closed and GroundDIN 209552006N20200000
     
    Highly Corrosion-Resistant 316 Stainless Steel
    101.410.26.90.20.09Closed—18969T1260000
    1021.40.37.10.60.23Closed—18969T2440000
    1021.50.256.40.30.1Closed—18969T1680000
    1021.60.25.50.20.04Closed—18969T1330000
    102.41.60.47.31.30.49Closed—18969T2960000
    102.51.90.36.30.50.14Closed—18969T2510000
    102.520.255.60.30.07Closed—18969T1940000
    102.822.180.325.90.60.15Closed—18969T2750000
    1032.40.35.60.40.1Closed—18969T2590000
    1032.50.2550.20.05Closed—18969T2080000
    104.53.50.55.91.40.33Closed and Ground—18969T3820000
    107.35.317.262.2Closed and Ground—18969T750000
     

    Extension Springs

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

    Hook 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.
    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.
    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 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.
    Hook End
     
    Highly Corrosion-Resistant 316 Stainless Steel
    1020.2519.50.060.760.0751942N43000000
    1030.320.50.080.840.0751942N4700000
    1040.323.40.060.610.0451942N5100000
     

    Slotted Spring Pins

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

    End View

    Squeeze these pins into holes and they expand slightly, creating tension to hold parts in place. They are often used as hinge pins and as fasteners for springs and power transmission components. An alternative to dowel pins, they're lighter in weight with a hollow center and don’t need a precise hole. Also known as roll pins.
    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
    Wall Thk.,
    mm
    Double Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Spring Steel
     
    1.5 mm Diameter
    101.5 to 1.60.3350Rockwell C42ISO 875210091611A084000000
     
    2 mm Diameter
    1020.2330Rockwell C42DIN 7346, ISO 1333710097161A10500000
    102 to 2.10.4600Rockwell C42ISO 875220091611A10400000
     
    2.5 mm Diameter
    102.50.25530Rockwell C42DIN 7346, ISO 1333710097161A1170000
    102.5 to 2.60.5950Rockwell C42DIN 1481, ISO 875210091611A0960000
     
    3 mm Diameter
    1030.3780Rockwell C42DIN 7346, ISO 1333710097161A13000000
    103 to 3.10.61,400Rockwell C42ISO 875220091611A15400000
     
    3.5 mm Diameter
    103.5 to 3.650.82,000Rockwell C42ISO 875210091611A1850000
     
    4 mm Diameter
    1040.51,700Rockwell C42DIN 7346, ISO 133375097161A14500000
    104 to 4.20.82,500Rockwell C42ISO 875210091611A20400000
     
    5 mm Diameter
    105 to 5.213,900Rockwell C42DIN 1481, ISO 875210091611A30300000
     
    6 mm Diameter
    1060.754,000Rockwell C42DIN 7346, ISO 133372597161A18200000
     
    8 mm Diameter
    1080.755,300Rockwell C42DIN 7346, ISO 133372597161A20300000
     
    10 mm Diameter
    101015,300Rockwell C42DIN 7346, ISO 133371097161A22500000
     
    12 mm Diameter
    1012110,700Rockwell C42DIN 7346, ISO 133371097161A2430000
     
    13 mm Diameter
    10131.214,800Rockwell C42DIN 7346, ISO 13337597161A26100000
     
    16 mm Diameter
    10161.522,000Rockwell C42DIN 7346, ISO 133371097161A27500000
     
    Corrosion-Resistant 18-8 Stainless Steel
     
    1.5 mm Diameter
    101.5 to 1.60.3Not RatedNot RatedISO 87522591610A1140000
     
    2 mm Diameter
    102 to 2.10.4Not RatedNot RatedDIN 1481, ISO 87522591610A2050000
     
    2.5 mm Diameter
    102.5 to 2.60.5Not RatedNot RatedISO 87522591610A2470000
     
    3 mm Diameter
    103 to 3.10.6Not RatedNot RatedDIN 1481, ISO 87522591610A4050000
     
    3.5 mm Diameter
    103.5 to 3.650.75Not RatedNot RatedDIN 1481, ISO 87525091610A45000000
     
    4 mm Diameter
    104 to 4.20.8Not RatedNot RatedDIN 1481, ISO 87521091610A5040000
     
    5 mm Diameter
    105 to 5.21Not RatedNot RatedDIN 1481, ISO 87521091610A5990000
     

    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
     
    1.5 mm Diameter
    101.600 to 1.700175Rockwell C43ASME B18.8.3M, DIN 7343, ISO 87505091612A33900000
     
    2 mm Diameter
    102.000 to 2.100550Rockwell C43ISO 87505091612A21600000
     
    2.5 mm Diameter
    102.500 to 2.600850Rockwell C43ASME B18.8.3M, DIN 7343, ISO 87505091612A3070000
     
    3 mm Diameter
    103.000 to 3.1001,200Rockwell C43DIN 7343, ISO 87505091612A22200000
     
    3.5 mm Diameter
    103.500 to 3.6001,600Rockwell C43ASME B18.8.3M, DIN 7343, ISO 87502591612A30800000
     
    4 mm Diameter
    104.000 to 4.1002,100Rockwell C41DIN 7343, ISO 87502591612A2310000
     
    5 mm Diameter
    105.000 to 5.1003,300Rockwell C43ASME B18.8.3M, DIN 7343, ISO 87502591612A31500000
     
    Corrosion-Resistant 18-8 Stainless Steel
     
    1 mm Diameter
    101.000 to 1.040100Not RatedDIN 7343, ISO 87505091612A10700000
     
    1.5 mm Diameter
    101.500 to 1.600200Not RatedASME B18.8.3M, DIN 7343, ISO 87502591612A3320000
     
    2 mm Diameter
    102.000 to 2.100400Not RatedDIN 7343, ISO 87502591612A11300000
     
    2.5 mm Diameter
    102.500 to 2.600650Not RatedASME B18.8.3M, DIN 7343, ISO 87502591612A3350000
     
    3 mm Diameter
    103.000 to 3.100900Not RatedDIN 7343, ISO 87502591612A14300000
     
    back to top