knob locking devices operation & installation knob locks are positive friction locking devices for holding precise or critical control settings under conditions of shock and vibration. they are also useful where there is danger of accidental jarring or manual contact. special splash-proof versions feature molded rubber inserts which prevent water leakage down into the control and also serve as dust seals. positive friction locking system resists shock, vibration, or accidental movement tested under salt spray, humidity, and temperature conditions occupies minimum panel space used with standard off-the-shelf control knobs, .700, .900 and 1.250 diameter knobs no special mounting hardware or tools required special water and dust-tight models available made of highest quality materials available in three sizes in either mirror or matte ?ish standard splash proof unlocked locked an eighth turn of the ?ted skirt locks the control knob by forcing a rubber bushing against its lower surface. a critical control setting is not affected. an eighth turn to the left frees the knob to rotate freely. used primarily with potentiometers and similar variable controls, knob locks mount directly to threaded control bushings replacing the nuts and lock washers usually supplied. part number overall overall ms91528 type finish diam. a diam. b thread .700 diam. knob kl701 standard mirror 1 .721 3/8-32 kl701g 1cc2b standard matte 1 .721 3/8-32 kl702 standard mirror 1 .721 1/4-32 kl702g 1cc2g standard matte 1 .721 1/4-32 kl703 splash proof mirror 1 .721 3/8-32 kl703g 1dd2b splash proof matte 1 .721 3/8-32 .900 diam. knob kl901 standard mirror 1-5/16 .928 3/8-32 KL901G 2cc2b standard matte 1-5/16 .928 3/8-32 kl902 splash proof mirror 1-5/16 .928 3/8-32 kl902g 2dd2b splash proof matte 1-5/16 .928 3/8-32 1.250 diam. knob kl1251 standard mirror 1-5/8 1.269 3/8-32 kl1251g 3cc2b standard matte 1-5/8 1.269 3/8-32 kl1252 splash proof mirror 1-5/8 1.269 3/8-32 kl1252g 3dd2b splash proof matte 1-5/8 1.269 3/8-32 knob knob lock knob locks the above ms91528 designations are for reference only. series of knobs used in conjunction with knob lock are ms91528, eh71 and contemporary. style kl701 .70 diam. knob style kl901 .90 diam. knob style kl1251 1.25 diam.knob b 3 8 5 16 a thread 1 2 l o c k l o c k knob area electronic hardware corporation 320 broad hollow road, farmingdale, ny 11735 phone: 631.752.1950 fa x : 631.752.1971 www .ehcknobs.com e mail: sales@ehcknobs.com 1-800-752-1680 24
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