Drain plug definitions
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Guide Point
An unthreaded
cylindrical tip that is smaller than the plug diameter.
Used to help speed alignment and reduce the chance of cross threading. Also
called a dog point or pilot point.
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Oversize
Oversize plugs are used when the
existing threads are striped. They
are tapered, hardened and form new threads.
These plugs can permanently repair an oil pan, saving the cost of a
replacement.
SOS= single oversize DOS=double
TOS=triple oversize
Oversize plugs are
just slightly larger than the original plug.
Double and triple oversize plugs
are available only in the common ½”-20 size.
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Piggy Back
Piggy back plugs are also
oversize, but they have a main plug that is installed once into the old
threads.
Then the oil is drained thru the smaller secondary plug.
Piggy Back plugs
are used when you do not want to re-use the original threads.
Magnetic
plugs remove abrasive, ferrous metal particles preventing their circulation
through lubrication or hydraulic systems.
Magnetic
plugs have been used since the 1930’s typical
applications include:
| Automotive |
Aircraft |
| Agricultural Machinery |
Oil Drain Pans |
| Transmissions |
Differentials |
| Transfer Cases |
Motorcycles |
| Outboard Engines |
Earth Moving Equipment |
| Combines |
Bailers |
| Lift Trucks |
Mining Equipment |
| Military Vehicles |
Turbine Engines |
| Truck Axles |
Diesel Engines |
| Lawn Mowers |
Garden Tractors |
| Hydraulic Systems |
Oil Well Equipment |
| Speed Reducers & Gear Boxes |
Pumps |
| Hoists & Cranes |
Printing Presses |
| Drilling Equipment |
Farm Tractors |
Air
Conditioning and Refrigeration Compressors
Recreational
Vehicles – Snowmobiles – All Terrain Vehicles
