Allen-Bradley #EJA1N048F502M, 5K-Ohm, TYPE J Extra Life (100,000 cycles. These are the sealed composite high use Linear pots, these pots have a tiny wrist-pin through the shaft. Alternate part number is A-034117-01.
Type J hot-molded carbon composition potentiometers are used in industrial and military applications for reliable, dependable and exceptional service requirements. Meet MIL-R-94. JA1N Series has 3/8" bushing length with 1/4" dia., 7/8" long slotted shaft. JA1L Series has 1/2" bushing with 1/4" dia., 5/8" long slotted shaft. They are dust, corrosion and splash resistant. Made of non-magnetic material. Coated terminals. Tolerance: 10%. Linear taper. 2.25 watts. 100,000 rotations cycle life. Supplied with locating pin and hardware.