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The Type KN series of fluted knobs are designed to replace the Type [[637]] series. The black KN knobs are made of phenolic | The Type KN series of fluted knobs are designed to replace the Type [[637]] series. The black KN knobs are made of phenolic | ||
resin with a molded-in brass inserts, later gray knobs are manufactured using thermo-setting plastic. This is a change from the molded bakelite composition of the [[637]] series. Many in the series are adaptable from 3/8" to 1/4" with the included reducing bushing. The series includes the special [[ZKNU-3]] knob with an attached spinner for quick rotation of slow-motion controls. | resin with a molded-in brass inserts, later gray knobs are manufactured using thermo-setting plastic. This is a change from the molded bakelite composition of the [[637]] series. Many in the series are adaptable from 3/8" to 1/4" with the included reducing bushing. The series includes the special [[ZKNU-3]] knob with an attached spinner for quick rotation of slow-motion controls. Larger KNSP knobs are designed to accept dial plates, [[970-P1]] and [[970-P2]]. | ||
Gray knobs were only offered in {{Catalog S}}, the last catalog knobs of any kind were available. | |||
See the table for all members in the series. | See the table below for all members in the series. | ||
==Specifications== | ==Specifications== | ||
* '''Shaft Size:''' 3/8" and 1/4" see table below | * '''Shaft Size:''' 3/8" and 1/4" except [[KNU-14GY]] 1/8" see table below | ||
* '''Composition:''' thermo-setting plastic, phenolic resin | * '''Composition:''' thermo-setting plastic, phenolic resin | ||