Continental engines may require a 'brass' oil probe adapter. These come in: 1/4" OD tapered, 3/8" OD tapered, and 5/8" OD straight not tapered with 1/8" ID NPT. JPI has only one Oil probe collar adapter. This comes in: 5/8" OD straight not tapered with 1/8" ID NPT.
NPT - National Pipe Thread Taper
Note! Pipe thread sizes do not refer to any physical dimensions. The outside diameter of a pipe or fitting must be measured and referenced to a table for size identification.
Note! Inserting a NPT tapered fitting into a port tapped for a straight thread fitting and tightening it can break or severely damage the item the fitting is being installed in.
Pipe Size (inch)
Thread Pitch TPI
Fitting O.D. (inch)
Tapered thread 1° 47'
Flat truncation of thread roots and crests
Thread angle 60°
Thread Pitch measured in threads per inch
The best service and prices, with the largest inventory & fastest shipping. Serving aircaft owners, pilots & RC modellers for 30 years.
Grants Pass Airport 1301 Brookside Blvd. - Grants Pass, OR 97526 West Coast Store: Mon-Fri 7am-5pm Pacific Standard Time
Deland Airport 813A Flightline Blvd. Ste. 1 - Deland, FL 32724 East Coast Store: Mon-Fri 8:30am-5:30pm, Eastern Standard Time