Stainless-Steel Rotary Latch

Oct. 10, 2018
Southco's rotary latch delivers increased corrosion resistance for durable, long-lasting performance.

A medium-duty stainless-steel rotary latch offers a more durable option for highly corrosive environments. The R4-20 provides a robust, long-lasting solution for demanding applications such as access panels and doors on Off-Highway and Marine equipment.


The latch features a compact, space-saving design that facilitates inside door mounting and is available in through-hole, metric and imperial mounting styles. This versatile R4-20 Rotary Latch is available with single or two-stage latching, ensuring secure latching at low closing forces. Southco’s R4-20 series offers superior latch to striker mating tolerances, making it suitable for flexible panel applications with inherent misalignment concerns.

  • Compact latch envelope and cross-section fits thin-profile doors, minimizes protrusion within the enclosure
  • Forgiving mating tolerance accommodates misalignment and flexing of long door panels or hoods
  • In the closed position, latch fully envelopes striker bolt for secure grip and protection
  • All-metal construction for durable, long-lasting performance
  • Hardened steel cams and triggers provide durable latching engagement
  • Stainless steel styles for use in marine and off-highway applications
  • Corrosion-resistant finish minimizes danger of rust interfering with latch operation or staining door panel
  • Many styles compatible with single and multi-point remote actuation using cables or mechanical linkage


Available Options

  • Separate models available for right-hand and left-hand opening styles
  • Available in choice of threaded and through-hole mounting styles
  • Electronically actuated rotary latch models also available
  • Two-stage cam version prevents false latching condition
  • Single and two-stage cam versions with integrated bumper option to eliminate noise and vibration
  • Dual point option allows the rotary latch to be actuated from different points
  • Compact and micro styles minimize protrusion within the enclosure
  • Integrated cable mounting bracket option eliminates the need for secondary
  • installation components
  • Paddle actuator option combines rotary latch and actuator into one solution for simplified rotary system installation


Standards and Specifications

  • Heavy-duty style latch meets Federal Motor Vehicle Safety Standard 206 for crash test performance when installed with optional supplemental bracket
  • Stainless steel styles (304 SS) meet marine salt spray requirement
  • Maximum dynamic working load for R4-20 Series is 200 N (45 lb.)


Industry Applications

  • Bus, Coach & RV
  • Enclosures
  • Industrial Machinery
  • Med & Heavy Truck
  • Off-Highway – Construction, Farm Vehicles