The 42M36-01-1-03N is a multi-deck rotary switch from Grayhill's Series 42, featuring a 1-inch diameter and 1 amp continuous current rating with rugged construction designed for long-term equipment operation. This switch incorporates adjustable stop washers with optional knurled nut securing mechanism, providing flexible positioning control without a bushing keyway. The unit is available in standard and military-qualified versions (MIL-S-3786/04), with solder lug termination and UL recognition. Key dimensional specifications include a 0.375-inch diameter shaft with 3/8-32 UNEF-2A thread, non-turn tab dimensions of 0.125 ± 0.003 inches wide by 0.031 ± 0.003 inches thick, and bushing keyway of 0.066 ± 0.002 inches wide by 0.036 ± 0.003 inches deep. The switch is commonly used in military equipment prototypes and applications requiring multiple circuitry options with adjustable positioning capabilities.