Switch, rotary enclosed, 10 amp, 125 VAC, double pole, single throw (DPST), submersible to 15 feet, non-magnetic. recessed mounting. Consists of a Type 1SR2A4 rotary switch per MIL-S-15291/3 mounted in a 3" round brass enclosure per MIL-E-24142/5 that is actuated by a sealed shaft penetrating the cover. The assembly mounts within a 3-13/32" diameter hole in the panel or bulkhead with (4) #8-32 flat head screws (not furnished). A gasket is provided to give a watertight seal between the flange of the enclosure and the panel or bulkhead to which it is mounted. Switch action is ON-OFF-ON-OFF. Symbol 801.1 per MIL-DTL-15743/1, part number M15743/1-001. NSN 5930-00-296-4527. Similar to Symbol 801.2 which is surface-mounted.