Nose Material Nose Material |
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Body Material Body Material |
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Nose Type Nose Type |
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![]() | Ball |
Locking Type Locking Type |
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Without Thread Locker | Thread Locker |
Compressed Nose Force Compressed Nose Force |
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Drive Style Drive Style |
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Extended Nose Length Extended Nose Length |
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Extended Nose Force Extended Nose Force |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Maximum Thread Locker Temperature Maximum ThreadLocker Temperature |
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Minimum Thread Locker Temperature Minimum ThreadLocker Temperature |
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Thread Locker Type Thread Locker Type |
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Slotted Ball-Nose Spring Plungers


Install these spring plungers with a screwdriver—they're slotted on one or both ends. The ball nose rolls to minimize wear and allow parts to move in and out of position.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Spring plungers without thread locker are for use in soft material such as aluminum, in extreme temperatures, and on parts requiring frequent assembly and removal.
Spring plungers with thread locker have a locking element that adds friction to resist loosening.
Extended nose force is the force required to begin to depress the nose. Compressed nose force is the force required to depress the nose flush with the body. When using a plunger as a detent or stop, a lighter nose force with a shallower hole releases more easily, while a heavier force with a deeper hole holds more securely.
For technical drawings and 3-D models, click on a part number.

Nose | Nose Force, lbs. | |||||||
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Thread Size | Body Lg. | Extended Lg. | Dia. | Extended | Compressed | Choose a Locking Type | Each | |
Brass Body and Brass Nose | ||||||||
4-48 | 0.187" | 0.02" | 0.062" | 0.1 | 0.5 | 0000000 | 00000 | |
5-40 | 0.25" | 0.02" | 0.062" | 0.3 | 0.8 | 0000000 | 0000 | |
6-40 | 0.312" | 0.023" | 0.078" | 0.5 | 1 | 0000000 | 0000 | |
8-32 | 0.344" | 0.025" | 0.094" | 0.5 | 1.3 | 0000000 | 0000 | |
8-36 | 0.344" | 0.025" | 0.094" | 0.5 | 1.3 | 0000000 | 0000 | |
10-32 | 0.513" | 0.025" | 0.094" | 1.5 | 3 | 0000000 | 0000 | |
10-32 | 0.513" | 0.025" | 0.094" | 2 | 5 | 0000000 | 0000 | |
1/4"-20 | 0.531" | 0.035" | 1/8" | 2 | 4 | 0000000 | 0000 | |
1/4"-20 | 0.531" | 0.035" | 1/8" | 4 | 12 | 0000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | 6 | 17 | 0000000 | 00000 | |
3/8"-16 | 0.625" | 0.048" | 0.188" | 5 | 10 | 0000000 | 00000 | |
1/2"-13 | 0.75" | 0.072" | 0.281" | 6 | 30 | 0000000 | 00000 | |
5/8"-11 | 0.984" | 0.096" | 3/8" | 7 | 50 | 0000000 | 00000 |
Press-Fit Ball-Nose Spring Plungers


Designed with a flange to keep the plunger from being pushed through a hole when the ball is depressed. These spring plungers have a tapered end and smooth body to make them easy to press into unthreaded holes in soft material such as wood, plastic, and aluminum. Drill a slightly smaller hole for a snug fit.
Stainless steel is chemical resistant and may be mildly magnetic.
Brass is corrosion resistant in wet environments.
Extended nose force is the force required to begin to depress the nose. Compressed nose force is the force required to depress the nose flush with the body. When using a plunger as a detent or stop, a lighter nose force with a shallower hole releases more easily, while a heavier force with a deeper hole holds more securely.
For technical drawings and 3-D models, click on a part number.

Body | Nose | Flange | Nose Force, lbs. | Brass Body | |||||||
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Dia., mm | Lg., mm | Extended Lg., mm | Dia., mm | Temp. Range Min. | Temp. Range Max., °F | Dia., mm | Thick., mm | Extended | Compressed | Each | |
400 Series Stainless Steel Nose | |||||||||||
3 | 3.4 | 0.6 | 2.4 | Not Rated | 480° | 3.6 | 0.6 | 0.4 | 0.8 | 0000000 | 00000 |
4 | 4 | 0.8 | 3 | Not Rated | 480° | 4.5 | 1 | 0.7 | 1.3 | 0000000 | 0000 |
5 | 5 | 1 | 4 | Not Rated | 480° | 5.5 | 1 | 0.9 | 1.5 | 0000000 | 0000 |
6 | 6 | 1.6 | 5 | Not Rated | 480° | 6.5 | 1 | 1.3 | 2.6 | 0000000 | 0000 |
8 | 8 | 1.9 | 6.5 | Not Rated | 480° | 8.5 | 1 | 1.8 | 2.8 | 0000000 | 0000 |