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    19 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
    284.83.20.819.15.90.66ClosedDIN 209552006N301000000
     
    Highly Corrosion-Resistant 316 Stainless Steel
    284.83.20.820.450.67Closed and Ground—18969T6080000
     

    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.
    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
    287.50.770.20.383.460.0723630N186000000
     

    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Each
    Black-Oxide Steel
    M5 × 0.8 mm19Coarse
    		28539634K3900000
     

    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Each
    18-8 Stainless Steel
    M5 × 0.8 mm19Coarse
    		285395907A180000000
     

    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.
    Material Certificate Icon
    Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
    Thread
    Size
    Min. Lg.,
    mm
    Spacing
    Lg.,
    mm
    Dia.,
    mm
    Hole Dia.,
    mm
    Hex Size,
    mm
    Each
    18-8 Stainless Steel
    M5 × 0.8 mm19Coarse
    		28531.596376A580000000
     

    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
    M5 × 0.8 mm19Coarse
    		28531.597745A180000000
     

    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
     
    3 mm Diameter
    2830.3780Rockwell C42DIN 7346, ISO 133375097161A138000000
    283 to 3.10.61,400Rockwell C42ISO 875210091611A1710000
     
    4 mm Diameter
    2840.51,700Rockwell C42DIN 7346, ISO 133375097161A15400000
     
    5 mm Diameter
    2850.52,300Rockwell C42DIN 7346, ISO 133375097161A17200000
    285 to 5.213,900Rockwell C42ISO 875210091611A31100000
     
    6 mm Diameter
    2860.754,000Rockwell C42DIN 7346, ISO 133372597161A19100000
     
    8 mm Diameter
    2880.755,300Rockwell C42DIN 7346, ISO 133372597161A21200000
     
    12 mm Diameter
    2812110,700Rockwell C42DIN 7346, ISO 13337597161A2480000
     
    13 mm Diameter
    28131.214,800Rockwell C42DIN 7346, ISO 13337597161A26900000
     
    16 mm Diameter
    28161.522,000Rockwell C42DIN 7346, ISO 13337597161A28400000
     
    Corrosion-Resistant 18-8 Stainless Steel
     
    3 mm Diameter
    283 to 3.10.6Not RatedNot RatedDIN 1481, ISO 87521091610A4210000
     
    5 mm Diameter
    285 to 5.21Not RatedNot RatedISO 87521091610A6260000
     
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