Long Thread 6.35mm Round Shaft Solder Lug 16mm Linear Potentiometer B R63GL

This is one item of 16mm body, linear carbon track potentiometer made by Alpha Taiwan.

They have solder lug connections and a longer than usual threaded part on the shaft. There are various track values available on the different variations. The total shaft length is 15mm, of which the threaded part is 10mm long and the circular turning part is 5mm long and 6.3mm, 0.25" diameter.

The mounting hole required is 7mm diameter. The nut and washer are provided. I believe that these are used on some modern electric guitars where the longer thread enables them to reach through the body.

The "B" prefix before the track resistance value denotes a linear track taper. The max power rating is 0.2W. If you have a pot with a track label of B503, this is a B50K where 3 is the number of zeros after 50 in Ohms. A 502 would be 5K, a 472 would be 4.7K etc. Sometimes pots may also be labelled with the B as a suffix i.e. 50KB.