Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Nose Material Nose Material |
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Locking Type Locking Type |
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Without Thread Locker | Thread Locker |
Body Type Body Type |
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Body Material Body Material |
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Handle Type Handle Type |
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Knob | Add a Knob |
Drive Style Drive Style |
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Slotted | Hex | Spring Plunger Wrench |
Extended Nose Force Extended Nose Force |
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Compressed Nose Force Compressed Nose Force |
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Thread Type Thread Type |
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Handle Locking Type Handle Locking Type |
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Handle Material Handle Material |
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Thread Spacing Thread Spacing |
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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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Handle Texture Handle Texture |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Knob-Style Retractable Spring Plungers
![]() Knurled Knob | ![]() With Thread Locker |
![]() Without Thread Locker |
Retract the nose by pulling the knob. These spring plungers have a long nose that provides a large bearing surface to handle side loads.
Knurled knob spring plungers provide a slip-resistant surface for controlled adjustment.
Steel is strong and wear resistant. Zinc-plated steel bodies resist corrosion in wet environments.
316 stainless steel is more corrosion resistant than 18-8 stainless steel and can be used in saltwater environments.
18-8 stainless steel is chemical resistant.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Plastic is chemical resistant and lightweight. Acetal plastic noses are extra soft to minimize scratching soft surfaces such as aluminum.
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 patch 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.
Thread | Nose | Handle | Nose Force, lbs. | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Body Lg. | Extended Lg. | Dia. | Dia. | Material | Texture | Extended | Compressed | Choose a Locking Type | Each | |
Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 0.625" | 1" | 0.19" | 0.155" | 5/8" | Steel | Knurled | 1 | 6 | 0000000 | 000000 | |
Zinc-Plated Steel Body and Steel Nose | ||||||||||||
5/16"-18 | 0.625" | 1" | 0.188" | 0.154" | 0.63" | Steel | Knurled | 1 | 6 | 00000000 | 00000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | ||||||||||||
5/16"-18 | 0.58" | 1" | 0.19" | 0.155" | 5/8" | 316 Stainless Steel | Knurled | 1 | 5 | 0000000 | 00000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
5/16"-18 | 0.625" | 1" | 0.188" | 0.154" | 0.63" | 18-8 Stainless Steel | Knurled | 1 | 6 | 00000000 | 00000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 0.625" | 1" | 0.19" | 0.155" | 5/8" | 18-8 Stainless Steel | Knurled | 1 | 6 | 00000000 | 00000 | |
Brass Body and Brass Nose | ||||||||||||
5/16"-18 | 0.58" | 1" | 0.19" | 0.155" | 5/8" | Brass | Knurled | 1 | 5 | 0000000 | 00000 |
Twist-to-Lock Knob-Style Retractable Spring Plungers
![]() Knurled Knob | ![]() Without Thread Locker |
![]() With Thread Locker |
Lock the nose into the retracted position by pulling the knob and rotating it 90°. These spring plungers have a long nose that provides a large bearing surface to handle side loads.
Knurled knob spring plungers provide a slip-resistant surface for controlled adjustment.
Steel is strong and wear resistant. Zinc-plated steel bodies resist corrosion in wet environments. Black-oxide steel bodies resist corrosion in dry environments.
316 stainless steel is more corrosion resistant than 18-8 stainless steel and can be used in saltwater environments.
18-8 stainless steel is chemical resistant.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Plastic is chemical resistant and lightweight; acetal noses are extra soft to minimize marring soft surfaces such as aluminum.
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 patch 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.
Thread | Nose | Nose Force, lbs. | Handle | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Body Lg. | Extended Lg. | Dia. | Temp. Range, °F | Extended | Compressed | Dia. | Texture | Choose a Locking Type | Each | |
Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 0.625" | 1.09" | 0.188" | 0.179" | -30° to 190° | 1.5 | 6 | 5/8" | Knurled | 0000000 | 000000 | |
Zinc-Plated Steel Body and Steel Nose | ||||||||||||
5/16"-18 | 0.625" | 1.094" | 0.187" | 0.155" | __ | 1.5 | 6 | 5/8" | Knurled | 00000000 | 00000 | |
Black-Oxide Steel Body and Steel Nose | ||||||||||||
5/16"-18 | 0.63" | 1" | 0.19" | 0.155" | __ | 1 | 5 | 5/8" | Knurled | 0000000 | 00000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | ||||||||||||
5/16"-18 | 0.63" | 1" | 0.19" | 0.155" | __ | 1 | 5 | 5/8" | Knurled | 0000000 | 00000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
5/16"-18 | 0.625" | 1.094" | 0.187" | 0.155" | __ | 1.5 | 6 | 5/8" | Knurled | 00000000 | 00000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 0.625" | 1.09" | 0.188" | 0.179" | -30° to 190° | 1.5 | 6 | 5/8" | Knurled | 0000000 | 00000 | |
Brass Body and Brass Nose | ||||||||||||
5/16"-18 | 0.63" | 1" | 0.19" | 0.155" | __ | 1 | 5 | 5/8" | Knurled | 0000000 | 00000 |
Add-a-Knob Retractable Spring Plungers



Thread onto machinery or attach a knob or handle to the threaded spindle. The nose is long to provide a large bearing surface to handle side loads.
Steel is strong and wear resistant.
18-8 stainless steel is chemical resistant and may be mildly magnetic.
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 nylon locking patch bonded to the threads 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.
Thread | Nose | Nose Force, lbs. | Knob End Thread | ||||||||
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Size | Lg. | Body Lg. | Extended Lg. | Dia. | Extended | Compressed | Size | Lg. | Choose a Locking Type | Each | |
Steel Body and Steel Nose | |||||||||||
5/16"-18 | 0.625" | 1.25" | 0.188" | 0.155" | 1.5 | 6 | 1/4"-20 | 11/32" | 0000000 | 000000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | |||||||||||
5/16"-18 | 0.625" | 1.25" | 0.188" | 0.155" | 1.5 | 6 | 1/4"-20 | 11/32" | 0000000 | 00000 |
Low-Profile Knob-Style Retractable Spring Plungers with Hex Drive
![]() | ![]() With Thread Locker |
![]() Without Thread Locker |
Install by hand or with a hex key in low-clearance applications. Retract the nose by pulling the knob. These spring plungers have a long nose that provides a large bearing surface to handle side loads.
Steel is strong and wear resistant.
Stainless steel is chemical resistant and may be mildly magnetic.
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 nylon locking patch bonded to the threads 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.
Thread | Nose | Handle | Nose Force, lbs. | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Lg. | Body Lg. | Extended Lg. | Dia. | Dia. | Material | Extended | Compressed | Drive Size | Choose a Locking Type | Each | |
Steel Body and Steel Nose | ||||||||||||
5/16"-18 | 0.8" | 1.07" | 0.187" | 0.154" | 0.875" | Zinc Yellow-Chromate-Plated Steel | 1 | 6 | 1/8" | 0000000 | 000000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
5/16"-18 | 0.8" | 1.07" | 0.187" | 0.154" | 0.875" | Stainless Steel | 1 | 6 | 1/8" | 0000000 | 00000 |
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.
Steel is strong and wear resistant.
440C stainless steel is hard, wear resistant, and mildly chemical resistant.
316 stainless steel is more corrosion resistant than 440C and 18-8 stainless steel and can be used in saltwater environments.
18-8 stainless steel is chemical resistant.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Plastic is chemical resistant and lightweight; nylon noses are extra soft to minimize marring soft surfaces such as aluminum.
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. | ||||||||
---|---|---|---|---|---|---|---|---|---|
Thread Size | Body Lg. | Extended Lg. | Dia. | Temp. Range, °F | Extended | Compressed | Choose a Locking Type | Each | |
Steel Body and 440C Stainless Steel Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 2 | 4.5 | 0000000 | 00000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 4 | 9 | 0000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 6 | 17 | 0000000 | 0000 | |
Steel Body and Nylon Plastic Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 2 | 4.5 | 00000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 4 | 9 | 00000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 6 | 17 | 00000000 | 0000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 6 | 17 | 0000000 | 00000 | |
18-8 Stainless Steel Body and 440C Stainless Steel Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 2 | 4.5 | 0000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 4 | 9 | 000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 6 | 17 | 000000 | 0000 | |
18-8 Stainless Steel Body and Nylon Plastic Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 2 | 4.5 | 00000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 4 | 9 | 00000000 | 0000 | |
5/16"-18 | 0.578" | 0.04" | 0.156" | -20° to 180° | 6 | 17 | 00000000 | 0000 | |
Brass Body and Brass Nose | |||||||||
5/16"-18 | 0.578" | 0.04" | 0.156" | __ | 6 | 17 | 0000000 | 00000 | |
Acetal Plastic Body and 440C Stainless Steel Nose | |||||||||
5/16"-18 | 0.578" | 0.039" | 0.156" | __ | 2 | 4.5 | Without Thread Locker | 00000000 | 0000 |
5/16"-18 | 0.578" | 0.039" | 0.156" | __ | 4 | 9 | Without Thread Locker | 00000000 | 0000 |
Acetal Plastic Body and Nylon Plastic Nose | |||||||||
5/16"-18 | 0.578" | 0.039" | 0.156" | -20° to 180° | 2 | 4.5 | Without Thread Locker | 00000000 | 0000 |
5/16"-18 | 0.578" | 0.039" | 0.156" | -20° to 180° | 4 | 9 | Without Thread Locker | 00000000 | 0000 |
Hex-Drive Ball-Nose Spring Plungers




Install with a hex key for more torque than slotted ball-nose spring plungers. They have a ball nose that rolls to minimize wear and allow parts to move in and out of position. Made from 440C stainless steel, the nose is hard, wear resistant, and mildly chemical resistant.
Steel bodies are strong and wear resistant. They have a black-oxide finish to resist corrosion in dry environments.
18-8 stainless steel bodies are chemical resistant and may be mildly magnetic.
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.
Long-Nose Spring Plungers


Install from the nose end without depressing the nose using a driver (sold separately). With a nose that is longer than a ball-nose, these provide a large bearing surface to handle side loads.
Steel is strong and wear resistant. Black-oxide steel bodies resist corrosion in dry environments.
316 stainless steel is more corrosion resistant than 18-8 stainless steel and can be used in saltwater environments.
18-8 stainless steel is chemical resistant.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Plastic is chemical resistant and lightweight; acetal noses are extra soft to minimize marring soft surfaces such as aluminum.
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.

Spring Plungers | ||||||||||||
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Thread | Body | Nose | Nose Force, lbs. | Drivers | ||||||||
Size | Length | Extended Lg. | Dia. | Min. Temp., °F | Max. Temp., °F | Extended | Compressed | Choose a Locking Type | Each | Each | ||
Black Oxide Steel Body and Steel Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 1.5 | 4.5 | 0000000 | 00000 | 0000000 | 00000 | |
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 3 | 15 | 0000000 | 0000 | 0000000 | 0000 | |
Black Oxide Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 1.5 | 4.5 | 0000000 | 0000 | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 3 | 15 | 0000000 | 0000 | 0000000 | 0000 | |
Black Oxide Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | -40 | 190 | 1.5 | 4.5 | 0000000 | 0000 | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | -40 | 190 | 3 | 15 | 0000000 | 0000 | 0000000 | 0000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 1.5 | 4.5 | 00000000 | 0000 | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 3 | 15 | 00000000 | 0000 | 0000000 | 0000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | -40 | 190 | 1.5 | 4.5 | 00000000 | 0000 | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | -40 | 190 | 3 | 15 | 00000000 | 0000 | 0000000 | 0000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 3 | 15 | 0000000 | 00000 | 0000000 | 0000 | |
Brass Body and Brass Nose | ||||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | __ | 3 | 15 | 0000000 | 00000 | 0000000 | 0000 |
Hex-Drive Long-Nose Spring Plungers


Install with a hex key for more torque than slotted long-nose spring plungers. These spring plungers have a nose that is longer than ball-nose spring plungers to provide a large bearing surface and handle side loads.
Steel is strong and wear resistant. Black-oxide steel bodies resist corrosion in dry environments.
18-8 stainless steel is chemical resistant and may be mildly magnetic.
Plastic is chemical resistant and lightweight; acetal noses are extra soft to minimize marring soft surfaces such as aluminum.
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 nylon 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. | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Body Lg. | Extended Lg. | Dia. | Temp. Range, °F | Extended | Compressed | Drive Size | Choose a Locking Type | Each | |
Black-Oxide Steel Body and Steel Nose | ||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | 1.5 | 4.5 | 3/32" | 0000000 | 00000 | |
5/16"-18 | 1" | 0.188" | 0.135" | __ | 3 | 15 | 3/32" | 0000000 | 0000 | |
Black-Oxide Steel Body and Acetal Plastic Nose | ||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | Not Rated | 1.5 | 4.5 | 5/32" | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | Not Rated | 3 | 15 | 5/32" | 0000000 | 0000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | __ | 1.5 | 4.5 | 3/32" | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | __ | 3 | 15 | 3/32" | 0000000 | 0000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||
5/16"-18 | 1" | 0.188" | 0.135" | Not Rated | 1.5 | 4.5 | 5/32" | 0000000 | 0000 | |
5/16"-18 | 1" | 0.188" | 0.135" | Not Rated | 3 | 15 | 5/32" | 0000000 | 0000 |
Slotted Long-Nose Spring Plungers


Slotted on both ends for installation with a screwdriver. With a nose that is longer than a ball-nose, these provide a large bearing surface to handle side loads.
Steel is strong and wear resistant. Zinc-plated steel bodies resist corrosion in wet environments. Black-oxide steel bodies resist corrosion in dry environments.
316 stainless steel is more corrosion resistant than 18-8 stainless steel and can be used in saltwater environments.
18-8 stainless steel is chemical resistant.
Brass is corrosion resistant in wet environments; brass noses are soft to minimize marring.
Plastic is chemical resistant and lightweight; acetal noses are extra soft to minimize marring soft surfaces such as aluminum.
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. | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Body Lg. | Extended Lg. | Dia. | Min. Temp., °F | Max. Temp., °F | Extended | Compressed | Choose a Locking Type | Each | |
Zinc-Plated Steel Body and Steel Nose | ||||||||||
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 1.3 | 4 | 0000000 | 00000 | |
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 3.8 | 15.5 | 0000000 | 0000 | |
Zinc-Plated Steel Body and 18-8 Stainless Steel Nose | ||||||||||
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 1.3 | 4 | 0000000 | 0000 | |
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 3.8 | 15.5 | 0000000 | 0000 | |
Zinc-Plated Steel Body and Acetal Plastic Nose | ||||||||||
5/16"-18 | 0.562" | 0.084" | 0.135" | -40° | 190° | 1.3 | 4 | 0000000 | 0000 | |
5/16"-18 | 0.562" | 0.084" | 0.135" | -40° | 190° | 3.8 | 15.5 | 0000000 | 0000 | |
Black-Oxide Steel Body and Steel Nose | ||||||||||
5/16"-18 | 0.563" | 0.084" | 0.135" | __ | __ | 1.5 | 4 | Thread Locker | 0000000 | 0000 |
5/16"-18 | 0.563" | 0.187" | 0.135" | __ | __ | 2 | 9 | 00000000 | 0000 | |
Black-Oxide Steel Body and Acetal Plastic Nose | ||||||||||
5/16"-18 | 0.563" | 0.084" | 0.135" | Not Rated | 200° | 1.5 | 4 | Thread Locker | 0000000 | 0000 |
5/16"-18 | 0.563" | 0.187" | 0.135" | -30° | 190° | 2 | 9 | 00000000 | 0000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | ||||||||||
5/16"-18 | 0.563" | 0.084" | 0.135" | __ | __ | 1.5 | 4 | 0000000 | 00000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 1.3 | 4 | 00000000 | 0000 | |
5/16"-18 | 0.562" | 0.084" | 0.135" | __ | __ | 3.8 | 15.5 | 00000000 | 0000 | |
5/16"-18 | 0.563" | 0.187" | 0.135" | __ | __ | 2 | 9 | 00000000 | 0000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||
5/16"-18 | 0.562" | 0.084" | 0.135" | -40° | 190° | 1.3 | 4 | 00000000 | 0000 | |
5/16"-18 | 0.562" | 0.084" | 0.135" | -40° | 190° | 3.8 | 15.5 | 000000000 | 0000 | |
5/16"-18 | 0.563" | 0.187" | 0.135" | -30° | 190° | 2 | 9 | 000000000 | 0000 | |
Brass Body and Brass Nose | ||||||||||
5/16"-18 | 0.563" | 0.084" | 0.135" | __ | __ | 1.5 | 4 | 0000000 | 00000 |
Long Hex-Nose Spring Plungers


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 nylon locking pellet 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.
Drivers for Spring Plungers

Install spring plungers from the nose end without depressing the nose.
For Thread Size | For Spring Plunger Nose Type | Each | |
Steel | |||
---|---|---|---|
5/16"-18, M8 | Ball Nose, Long Nose | 0000000 | 00000 |
Mounting Bases for Spring Plungers


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 mounting bases are strong and wear resistant.
18-8 stainless steel mounting bases are chemical resistant and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.