Specifications:
The document provides detailed specifications for the HS-820 series and HS-820-mini series of straight running plastic chains. Key dimensions are given in both millimeters and inches, including width, working load, and various other measurements.

Materials:
The plate materials used are POM-DP and POM-F, while the pin material is cold rolled austenitic stainless steel.

Dimensions and Measurements:
- HS-820 Series: Widths range from 63.5 mm (2.50 inches) to 190.5 mm (7.50 inches).
- HS-820-mini Series: Widths are 30.0 mm (1.18 inches) and 32.0 mm (1.26 inches).
- Radius and reverse radius are consistently 50 mm (1.97 inches) across the series.

Working Load:
The working load for both series is specified as 1230 N at 21℃, with a corresponding weight in kg/m provided.

Applications:
The document suggests various applications for these chains, although specific applications are not detailed in the provided text.

Additional Notes:
The document includes various dimensions and measurements critical for the application and installation of these chains, emphasizing the importance of precise specifications in their use.