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 | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | __ | 0.5 | 1 | 0000000 | 00000 | |
Steel Body and Nylon Plastic Nose | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | -20° to 180° | 0.5 | 1 | 00000000 | 0000 | |
316 Stainless Steel Body and 316 Stainless Steel Nose | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | __ | 0.5 | 1 | 0000000 | 00000 | |
18-8 Stainless Steel Body and 440C Stainless Steel Nose | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | __ | 0.5 | 1 | 000000 | 0000 | |
18-8 Stainless Steel Body and Nylon Plastic Nose | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | -20° to 180° | 0.5 | 1 | 00000000 | 0000 | |
Brass Body and Brass Nose | |||||||||
| 6-40 | 0.312" | 0.023" | 0.078" | __ | 0.5 | 1 | 0000000 | 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.
Go/No-Go Threaded Plug Gauges with Handle
Speed up thread tolerance checks—the handle on these gauges gives you a good grip to quickly thread and unthread go or no-go gauges. Use these gauges to make sure nuts, tapped holes, and other parts fall within tolerance. All are precisely manufactured to confirm thread fit. If the plug gauges wear down, you can insert new ones (not included) onto the taperlock handle.
A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Go gauges check the minimum internal thread size. No-go gauges check the maximum internal thread size. Go/no-go gauges have both a go gauge on one end of the handle and a no-go gauge on the other to speed up tests.
Gauges with a calibration certificate traceable to NIST were calibrated in a lab. The certificate, sometimes called a test report or long-form certificate, details the tested measurements.
Thread fit designates the tightness or looseness of mating threads. For inch threads, the higher the class number, the tighter the fit. 2B is standard for most imperial threads. These metric-threaded gauges are class 6H, which is comparable to the fit of those with class 2B.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Type | Pitch Dia. Tolerance | Hardness | Material | Features | Choose a For Thread Fit | Each | |
Go/No-Go Gauges | ||||||||
|---|---|---|---|---|---|---|---|---|
| 6-40 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Double-Ended Taperlock Handle | 00000000 | 0000000 | |
Go/No-Go Gauges with Calibration Certificate Traceable to NIST | ||||||||
| 6-40 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | Double-Ended Taperlock Handle | 0000000 | 000000 | |
Threaded Hole Location Gauges
Find the true center of threaded holes to precisely align and measure parts. Once you thread these gauges into a hole, their cylinder sticks out as a reliable reference point. They’re often used with a coordinate measuring machine (CMM) to pinpoint the coordinates of the cylinder’s exact center. You can then use those coordinates to measure distances between points or reference them for error-free assembly. Even without a CMM, you can use these gauges with a micrometer to measure accurate center-to-center distances.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Type | Hardness | Material | Each | |
| 6-40 | UNF | Rockwell C60 | Tool Steel | 0000000 | 0000000 |