2820AT,KNOB 4 ARM 1/4"-20 PHENOLIC
2820AU,KNOB 4 ARM 5/16"-18 PHENOLIC
2820-B,KNOB 4 ARM 3/8"-16 PHENOLIC
2820BA,KNOB 4 ARM 1/4"-20 PHENOLIC
2820BM,KNOB 4 ARM M6 X 1 PHENOLIC
2820BP,KNOB 4 ARM #8-32 PHENOLIC
2820BQ,KNOB 4 ARM #8-32 PHENOLIC
2820BS,KNOB 4 ARM #10-32 PHENOLIC
