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    82 Products

    Ball-Nose Spring Plungers

    Image of Product. Front orientation. Spring Plungers. Ball-Nose Spring Plungers.
    Image of Attribute. Front orientation. Contains Annotated. Ball-Nose Spring Plungers.
    Align, position, and lock moving parts for most machining and assembly tasks. These spring plungers have a spring-loaded ball that compresses when a part presses against it, and then pops out into a notch or groove to hold the part in place. Unlike long-nose spring plungers, the ball rolls easily in and out of position, so they're a great fit for applications that require consistent, smooth movement, such as positioning parts in an assembly line and aligning fixtures and jigs when cutting or drilling.
    Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.
    440C Stainless Steel Nose—The strongest, most wear-resistant stainless steel noses, these grind against hard metal surfaces without denting or scratching. However, they are not as corrosion resistant as 316 stainless steel.
    316 Stainless Steel Nose—With the best corrosion resistance of all, 316 stainless steel stands up to harsh weather, salt water, and chemicals. The nose is strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    Brass Nose—Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. Since brass is softer than other metals, these noses are less likely to dent surfaces, however, they could deform under high stress.
    Nylon Nose—Extra soft to avoid scratching delicate surfaces. Nylon is best for use on soft materials, such as aluminum. It will swell and weaken when exposed to moisture, however, so it should only be used in dry environments.
    Extended Nose Force—This is the amount of force needed to start depressing the nose.
    Compressed Nose Force—This is the amount of force needed to fully depress the nose into the plunger body, so it releases from a hole, notch, or surface. A lighter compressed nose force with a shallower hole releases more easily, while a heavier compressed nose force with a deeper hole holds more securely.
    Spring Plungers
    Spring
    Plunger Drivers
    Nose
    Nose
    Force, lbf
    Body
    Drive
    Style
    Thread
    Size
    Extended
    Lg.
    Dia.
    Extended
    Compressed
    Material
    Lg.
    Front
    Back
    Each
    Each
    440C Stainless Steel Nose
    5/16"-18
    0.039"0.156"24.5Acetal
    0.58"Slotted
    0000000000000———0
    5/16"-18
    0.039"0.156"49Acetal
    0.58"Slotted
    000000000000———0
    5/16"-18
    0.04"0.156"24.518-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"24.5Steel0.58"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.04"0.156"4918-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    000000000000000000000
    5/16"-18
    0.04"0.156"4918-8 Stainless Steel
    0.72"Spring Plunger DriverHex
    00000000000000000000000
    5/16"-18
    0.04"0.156"49Steel0.58"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.04"0.156"49Black-Oxide Steel0.72"Spring Plunger DriverHex
    0000000000000000000000
    5/16"-18
    0.04"0.156"61718-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    000000000000000000000
    5/16"-18
    0.04"0.156"617Steel0.58"Spring Plunger DriverSlotted
    0000000000000000000000
     
    316 Stainless Steel Nose
    5/16"-18
    0.04"0.156"617316 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    00000000000000000000000
     
    Brass Nose
    5/16"-18
    0.04"0.156"617Brass0.58"Spring Plunger DriverSlotted
    00000000000000000000000
     
    Nylon Nose
    5/16"-18
    0.039"0.156"24.5Acetal
    0.58"Slotted
    000000000000———0
    5/16"-18
    0.039"0.156"49Acetal
    0.58"Slotted
    000000000000———0
    5/16"-18
    0.04"0.156"24.518-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"24.5Steel0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"4918-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"49Steel0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"61718-8 Stainless Steel
    0.58"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.04"0.156"617Steel0.58"Spring Plunger DriverSlotted
    00000000000000000000000
     

    Long-Nose Spring Plungers

    Image of ProductInUse. Front orientation. Contains Annotated, Border. Spring Plungers. Long-Nose Spring Plungers.
    Image of Product. Front orientation. Spring Plungers. Long-Nose Spring Plungers.
    Image of Attribute. Front orientation. Contains Annotated. Long-Nose Spring Plungers.
    Lock heavy moving parts securely in place. Often used in indexing applications, these have a longer nose than ball-nose spring plungers to withstand greater side forces without disengaging. The nose compresses when a part presses against it, and then pops out into deep notches or grooves for a strong hold.
    Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.
    Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.
    18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    316 Stainless Steel Nose—With the best corrosion resistance of all, 316 stainless steel stands up to harsh weather, salt water, and chemicals. The nose is strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    Brass Nose—Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. Since brass is softer than other metals, these noses are less likely to dent surfaces, however, they could deform under high stress.
    Acetal Nose—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These noses are extra soft to avoid scratching delicate surfaces. They are best for use on soft materials, such as aluminum.
    Extended Nose Force—This is the amount of force needed to start depressing the nose.
    Compressed Nose Force—This is the amount of force needed to fully depress the nose into the plunger body, so it releases from a hole, notch, or surface. A lighter compressed nose force with a shallower hole releases more easily, while a heavier compressed nose force with a deeper hole holds more securely.
    Spring Plungers
    Spring
    Plunger Drivers
    Nose
    Nose
    Force, lbf
    Body
    Drive
    Style
    Thread
    Size
    Extended
    Lg.
    Wd.
    Dia.
    Extended
    Compressed
    Material
    Lg.
    Front
    Back
    Each
    Each
    Steel Nose
    5/16"-18
    0.084"0.135"1.34Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    000000000000000000000000
    5/16"-18
    0.084"0.135"1.54Black-Oxide Steel0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.084"0.135"3.815.5Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.187"0.135"29Black-Oxide Steel0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.188"0.135"1.54.5Black-Oxide Steel1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"1.54.5Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
    5/16"-18
    0.188"0.135"315Black-Oxide Steel1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"315Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
    5/16"-18
    0.188"0.125"1.54.5Black-Oxide Steel1"External Hex
    00000000000———0
    5/16"-18
    0.188"0.125"315Black-Oxide Steel1"External Hex
    00000000000———0
     
    18-8 Stainless Steel Nose
    5/16"-18
    0.084"0.135"1.3418-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.084"0.135"1.34Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.084"0.135"3.815.518-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.084"0.135"3.815.5Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.187"0.135"2918-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.188"0.135"1.54.518-8 Stainless Steel
    1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"1.54.518-8 Stainless Steel
    1"Spring Plunger Driver00000000000000000000000
    5/16"-18
    0.188"0.135"1.54.5Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
    5/16"-18
    0.188"0.135"31518-8 Stainless Steel
    1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"31518-8 Stainless Steel
    1"Spring Plunger Driver00000000000000000000000
    5/16"-18
    0.188"0.135"315Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
     
    316 Stainless Steel Nose
    5/16"-18
    0.084"0.135"1.54316 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.188"0.135"315316 Stainless Steel
    1"Spring Plunger Driver00000000000000000000000
     
    Brass Nose
    5/16"-18
    0.084"0.135"1.54Brass0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.188"0.135"315Brass1"Spring Plunger Driver00000000000000000000000
     
    Acetal Nose
    5/16"-18
    0.084"0.135"1.3418-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.084"0.135"1.34Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.084"0.135"1.54Black-Oxide Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.084"0.135"3.815.518-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    000000000000000000000000
    5/16"-18
    0.084"0.135"3.815.5Zinc-Plated Steel0.56"Spring Plunger DriverSlotted
    0000000000000000000000
    5/16"-18
    0.187"0.135"2918-8 Stainless Steel
    0.56"Spring Plunger DriverSlotted
    000000000000000000000000
    5/16"-18
    0.187"0.135"29Black-Oxide Steel0.56"Spring Plunger DriverSlotted
    00000000000000000000000
    5/16"-18
    0.188"0.135"1.54.518-8 Stainless Steel
    1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"1.54.518-8 Stainless Steel
    1"Spring Plunger Driver00000000000000000000000
    5/16"-18
    0.188"0.135"1.54.5Black-Oxide Steel1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"1.54.5Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
    5/16"-18
    0.188"0.135"31518-8 Stainless Steel
    1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"31518-8 Stainless Steel
    1"Spring Plunger Driver00000000000000000000000
    5/16"-18
    0.188"0.135"315Black-Oxide Steel1"Hex
    00000000000———0
    5/16"-18
    0.188"0.135"315Black-Oxide Steel1"Spring Plunger Driver0000000000000000000000
     

    Knob-Grip Retractable Spring Plungers

    Image of Product. Front orientation. Contains Annotated. Spring Plungers. Knob-Grip Retractable Spring Plungers.
    With the most versatile handle we offer, these fit in tight spaces while still giving you something to grab. A tug retracts the nose so you can make controlled adjustments. Use these spring plungers for everything from positioning workpieces to changing the height of tables and platforms.
    Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.
    Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.
    18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    316 Stainless Steel Nose—With the best corrosion resistance of all, 316 stainless steel stands up to harsh weather, salt water, and chemicals. The nose is strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    Brass Nose—Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. Since brass is softer than other metals, these noses are less likely to dent surfaces, however, they could deform under high stress.
    Acetal Nose—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These noses are extra soft to avoid scratching delicate surfaces. They are best for use on soft materials, such as aluminum.
    Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.
    Extended Nose Force—This is the amount of force needed to start depressing the nose.
    Compressed Nose Force—This is the amount of force needed to fully depress the nose into the plunger body, so it releases from a hole, notch, or surface. A lighter compressed nose force with a shallower hole releases more easily, while a heavier compressed nose force with a deeper hole holds more securely.
    Nose
    Nose
    Force, lbf
    Body
    Handle
    Nonlocking
    Twist-to-Lock
    Thread
    Size
    Thread
    Lg.
    Extended
    Lg.
    Dia.
    Extended
    Compressed
    Material
    Lg.
    Material
    Dia.
    Each
    Each
    Steel Nose
    5/16"-18
    0.6"0.19"0.155"15Black-Oxide Steel1.1"Steel5/8"———00000000000000
    5/16"-18
    0.63"0.187"0.155"1.56Zinc-Plated Steel1.09"Steel5/8"———00000000000000
    5/16"-18
    0.63"0.188"0.154"16Zinc-Plated Steel1"Steel5/8"00000000000000———0
     
    18-8 Stainless Steel Nose
    5/16"-18
    0.63"0.187"0.155"1.5618-8 Stainless Steel
    1.09"18-8 Stainless Steel
    5/8"———00000000000000
    5/16"-18
    0.63"0.188"0.154"1618-8 Stainless Steel
    1"18-8 Stainless Steel
    5/8"0000000000000———0
     
    316 Stainless Steel Nose
    5/16"-18
    0.6"0.19"0.155"15316 Stainless Steel
    1.1"316 Stainless Steel
    5/8"———0000000000000
    5/16"-18
    0.63"0.19"0.155"15316 Stainless Steel
    1.01"316 Stainless Steel
    5/8"000000000000———0
     
    Brass Nose
    5/16"-18
    0.6"0.19"0.155"15Brass1.1"Brass5/8"———0000000000000
    5/16"-18
    0.63"0.19"0.155"15Brass1.01"Brass5/8"000000000000———0
     
    Acetal Nose
    5/16"-18
    0.63"0.188"0.179"1.5618-8 Stainless Steel
    1.09"18-8 Stainless Steel
    5/8"———0000000000000
    5/16"-18
    0.63"0.188"0.179"1.56Steel1.09"Steel5/8"———0000000000000
    5/16"-18
    0.63"0.19"0.155"1618-8 Stainless Steel
    1"18-8 Stainless Steel
    5/8"0000000000000———0
    5/16"-18
    0.63"0.19"0.155"16Steel1"Steel5/8"000000000000———0
     

    Low-Profile Knob-Grip Retractable Spring Plungers

    Image of Product. Front orientation. Contains Annotated. Spring Plungers. Low-Profile Knob-Grip Retractable Spring Plungers.
    With the sleekest knob we offer, these fit in areas with low clearance, such as in between conveyors. They tighten with a hex key for installation in cramped spots where your fingers might not reach. Tug the knob back to manually retract the nose so you can position, align, and lock components as needed for your job.
    Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.
    Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.
    18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.
    Extended Nose Force—This is the amount of force needed to start depressing the nose.
    Compressed Nose Force—This is the amount of force needed to fully depress the nose into the plunger body, so it releases from a hole, notch, or surface. A lighter compressed nose force with a shallower hole releases more easily, while a heavier compressed nose force with a deeper hole holds more securely.
    Nose
    Nose
    Force, lbf
    Body
    Handle
    Twist-to-Lock
    Thread
    Size
    Thread
    Lg.
    Extended
    Lg.
    Dia.
    Extended
    Compressed
    Material
    Lg.
    Material
    Dia.
    Drive
    Style
    Each
    Steel Nose
    5/16"-18
    0.8"0.187"0.154"16Steel1.07"Zinc-Yellow-Chromate-Plated Steel7/8"Hex
    0000000000000
     
    18-8 Stainless Steel Nose
    5/16"-18
    0.8"0.187"0.154"1618-8 Stainless Steel
    1.07"18-8 Stainless Steel
    7/8"Hex
    000000000000
     

    Add-a-Handle Retractable Spring Plungers

    Image of Product. Front orientation. Spring Plungers. Add-a-Handle Retractable Spring Plungers.
    Image of Attribute. Front orientation. Contains Annotated. Add-a-Handle Retractable Spring Plungers.
    Customize these spring plungers with a handle (not included) that's the size, shape, texture, and color you want. Retractable spring plungers give you the control to position, align, and lock components as needed for your job.
    Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.
    18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.
    Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.
    Extended Nose Force—This is the amount of force needed to start depressing the nose.
    Compressed Nose Force—This is the amount of force needed to fully depress the nose into the plunger body, so it releases from a hole, notch, or surface. A lighter compressed nose force with a shallower hole releases more easily, while a heavier compressed nose force with a deeper hole holds more securely.
    Nose
    Nose
    Force, lbf
    Body
    Handle End
    Thread
    Twist-to-Lock
    Thread
    Size
    Thread
    Lg.
    Extended
    Lg.
    Dia.
    Extended
    Compressed
    Material
    Lg.
    Size
    Lg.
    Each
    Steel Nose
    5/16"-18
    0.63"0.188"0.155"1.56Steel1.25"1/4"-20
    11/32"0000000000000
     
    18-8 Stainless Steel Nose
    5/16"-18
    0.63"0.188"0.155"1.5618-8 Stainless Steel
    1.25"1/4"-20
    11/32"000000000000
     

    Spring Plunger Drivers

    Image of Product. Front orientation. Spring Plunger Drivers.
    Install spring plungers from the nose end without depressing the nose.
    For Thread
    Size
    For Spring
    Plunger Nose Type
    Each
    Steel
    5/16"-18, M8Ball, Long000000000000
     

    Spring Plunger Mounts

    Image of Product. Front orientation. Spring Plunger Mounts. Style A.
    Image of Attribute. Front orientation. Contains Annotated. Style A.

    Style A

    Style A

    Mount ball-nose and long-nose spring plungers to fixture surfaces. Insert the plunger into the threaded hole. They're good for horizontal applications. Fasteners are not included.
    Steel—Steel mounts are strong and wear resistant.
    18-8 Stainless Steel—18-8 stainless steel mounts are chemical resistant and may be mildly magnetic.
    Mounting
    Holes
    Steel
    18-8
    Stainless Steel
    Thread
    Size
    Lg.
    Wd.
    Ht.
    Dia.
    Ctr.-to-Ctr.
    Each
    Each
    Style A
    5/16"-18
    5/8"15/16"13/32"0.141"0.702"00000000000000000000000000
     

    Add-a-Handle Quick-Release Pins

    Customize these pins with a knob or handle (not included) that's the size, shape, texture, and color you want. Pins have a retaining ball that holds them in place until you pull to remove.
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Contains Annotated. Quick-Release Pins. Add-a-Handle Quick-Release Pins.
    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 stress and vibration as well as steel.
    Thread
    Usable
    Lg.
    Dia. at Extended
    Ball Ht.
    Size
    Lg.
    Single Shear Breaking
    Strength, lbf
    Min.
    Hardness
    Ball Material
    Each
    18-8 Stainless Steel
     
    5/16" Diameter
    1"0.356"5/16"-18
    3/8"7,200Rockwell B85Stainless Steel
    00000000000000
    1 1/2"0.356"5/16"-18
    3/8"7,200Rockwell B85Stainless Steel
    0000000000000
     
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