FIELD: textile industry. SUBSTANCE: apparatus has composite casing provided with single helical connection. Casing has one or two parallel thread paths. Helical connection has one or two miniaturized locating pins with parallel axes for positioning and axial mounting or dismantling of connection. Locating pins are positioned and retained in first part of casing made from high wear-resistance material, in particular, ceramics, by means of mechanical clamping devices and directed through calibrated openings into second part of casing. Connecting devices are arranged in single line extending in parallel with thread path, with both halves of double spinneret for two parallel thread paths being arranged symmetrically in both halves of casing for processing. Mechanical clamps prevent locating pins from displacement either by thermal effect or by chemical processing. Locating pins allows the whole casing of spinneret to be substantially miniaturized and thread path pitch to be regulated up to minimal value. Thread processing apparatus of such construction may be used in vortex-type spinnerets and in steam processing casings. EFFECT: enhanced reliability in operation of thread processing spinneret and casing under pressure, heat, steam conditions, provision for regulating thread path spacing to minimal values, minimal sensitivity to chemical substances used for processing, and prolonged service life. 10 cl, 11 dwg
