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.
18-8 stainless steel is chemical resistant.
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Body | Nose | Nose Force, lbs. | Drivers | ||||||||
Size | Lg. | Extended Lg. | Dia. | Min. Temp., °F | Max. Temp., °F | Extended | Compressed | Choose a Locking Type | Each | Each | ||
Black-Oxide Steel Body and Steel Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 1 | 4 | 0000000 | 00000 | 0000000 | 00000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 3 | 13 | 0000000 | 0000 | 0000000 | 0000 | |
Black-Oxide Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 1 | 4 | 0000000 | 0000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 3 | 13 | 0000000 | 0000 | 0000000 | 0000 | |
Black-Oxide Steel Body and Acetal Plastic Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | -40 | 190 | 1 | 4 | 0000000 | 0000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | -40 | 190 | 3 | 13 | 0000000 | 0000 | 0000000 | 0000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 1 | 4 | 00000000 | 0000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 3 | 13 | 00000000 | 0000 | 0000000 | 0000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | -40 | 190 | 1 | 4 | 00000000 | 0000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | -40 | 190 | 3 | 13 | 00000000 | 0000 | 0000000 | 0000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 1 | 4 | 0000000 | 00000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 3 | 13 | 0000000 | 00000 | 0000000 | 0000 | |
Brass Body and Brass Nose | ||||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 1 | 4 | 0000000 | 00000 | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | __ | 3 | 13 | 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 | ||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | 1 | 4 | 5/64" | 0000000 | 00000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | 3 | 13 | 5/64" | 0000000 | 0000 | |
Black-Oxide Steel Body and Acetal Plastic Nose | ||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | Not Rated | 1 | 4 | 1/8" | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | Not Rated | 3 | 13 | 1/8" | 0000000 | 0000 | |
18-8 Stainless Steel Body and 18-8 Stainless Steel Nose | ||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | 1 | 4 | 5/64" | 0000000 | 0000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | __ | 3 | 13 | 5/64" | 0000000 | 0000 | |
18-8 Stainless Steel Body and Acetal Plastic Nose | ||||||||||
| 1/4"-28 | 1" | 0.188" | 0.118" | Not Rated | 1 | 4 | 1/8" | 0000000 | 00000 | |
| 1/4"-28 | 1" | 0.188" | 0.118" | Not Rated | 3 | 13 | 1/8" | 0000000 | 00000 | |
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 | |||
|---|---|---|---|
| 1/4"-20, 1/4"-28, M6 | Ball Nose, Long Nose | 0000000 | 00000 |