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STW External Circlip (S-Type | JIS B 2804)

The STW external circlip is an S-type retaining ring manufactured according to the JIS B 2804 standard. It is designed to be installed into a groove on a shaft, preventing components from sliding or coming loose.

This circlip features a twin-hole design on the outer diameter, allowing for quick and secure installation or removal using circlip pliers.

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JIS 規範 C 型扣環｜STW 為通用代號｜安裝於軸心溝槽｜碳鋼材質｜適用自動化設備與軸向止動用途
JIS Standard C-Type Retaining Ring ｜ STW as Common Code ｜ Installed in Shaft Grooves ｜ Stainless Steel Material ｜ Used in Semiconductor and Medical Equipment

Product Features

  • Standard compliance: JIS B 2804 (DIN 471 also available upon request)

  • Mounting type: External fit onto shaft groove for axial component retention

  • Machining accuracy: Tight dimensional tolerances ensure secure groove fit

  • Material options:
     • S50C (Carbon Steel) – Black oxide finish for rust prevention
     • SUS420 (Stainless Steel) – Suitable for high-corrosion environments

  • Size range: For shaft diameters Ø3mm to Ø300mm (custom sizes available)

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 Applications

  • Shaft positioning in industrial machinery

  • Thrust ring retention in motors and electric drives

  • Clamping components in automated assembly systems

  • Anti-loosening features in automotive parts

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Customization & Notes

  • Low-volume supply, part number matching, and custom mold production available

  • Note: DIN 471 and JIS B 2804 differ in dimensions. Please verify compatibility before ordering.

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Reference Standards

  • JIS B 2804 (Japan)

  • DIN 471 (Germany)

  • CNS 9074 (Taiwan)

  • GB 894.1 (China)

  • ANSI B18.27 (United States)

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