The 73 series is a 2 watt precision 10-turn potentiometer. The 73JB is the economical version of the 73JA, offering all the electrical features of the 73JA, but employing a long life nylon shaft construction. The 73JB has a metal bushing with glass filled black nylon shaft. The 73JA has a stainless steel shaft and metal bushing. Both shafts are 1⁄4" dia, 13⁄16" long FMS and have 5⁄16" plain threaded bushing, screwdriver slots, and 50,000 cycles rotational life. End resistance is 0.3% of total resistance or 1 Ω, whichever is greater. 5% tolerance. 500 WV max.
The 73 Series is a 2 watt precision 10-turn potentiometer. The 73JB is the economical version of the 73JA, offering all the electrical features of the 73JA, but employing a long life nylon shaft construction. The 73JB has a metal bushing with glass filled black nylon shaft. The 73JA has a stainless steel shaft and metal bushing. Both shafts are 1⁄4" dia, 13⁄16" long FMS and have 5⁄16" plain threaded bushing, screwdriver slots, and 50,000 cycles rotational life. End resistance is 0.3% of total resistance or 1 Ω, whichever is greater. 5% tolerance. 500 WV max. Stop Torque: 75 oz.-in. Power Rating: 2 watts @ 70°C.

0.312 in. bushing length, slotted shaft ending, 500 V working voltage.