Use this article to identify the relevant standard, dimensions and purchasing fields before preparing an RFQ or order.
The Direct Difference Is the Section Type
GB/T 852-1988 is for I-sections; GB/T 853-1988 is for channels/U-sections. Both standards are current.
Do Not Specify Only “Square Taper Washer”
The standard number is part of the product identity and must appear in the purchase description.
They Are Not Interchangeable by Appearance
Both dimension tables cover M6–M36, but the thick-end h1 values differ. Select by the steel section and design requirement.
Reference Material
These references support further review of the standard name, edition, dimensions and related technical conditions.
- China National Standards Open System: GB/T 852-1988Used to verify the standard title, status, publication date and implementation date. The official platform does not currently provide the full text.
- China National Standards Open System: GB/T 853-1988Used to verify the standard title, status, publication date and implementation date. The official platform does not currently provide the full text.