GB/T 798-2021Eye bolts (English PDF)

Foreword

This document was drafted in accordance with the rules in GB/T 1.1-2020 Directives for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This document serves as a replacement of GB/T 798-1988 Eye Bolts. In comparison with GB/T 798-1988, apart from structural adjustments and editorial modifications, the main technical changes are as follows.

a) "NOTE. the variety of commodity fasteners shall be preferred" is deleted (see Chapter 1 of Version 1988);

b) The specification range and Grade-C product dimensions are modified; Grade-A and Grade-B products are added (see Chapter 1 and Chapter 4; Chapter 1 and Chapter 3 of Version 1988);

c) The quoted standards on bolts are unified as GB/T 193, GB/T 9145 and GB/T 9146 (see Table 3; Table 2 of Version 1988);

d) The requirements for perpendicularity tolerance and symmetry tolerance are added (see Chapter 5);

e) It is added that the universal technical conditions shall comply with GB/T 16983 (see Table 3);

f) It is added that the technical requirements for the surface treatment of hot-dip galvanized layer shall comply with GB/T 5267.3 (see Table 3);

g) It is added that the surface defects shall comply with GB/T 5779.1 (see Table 3).

1 Scope

This document specifies the types, dimensions, technical conditions and designation of eye bolts.

This document is applicable to eye bolts with the thread specification of M5 ~ M39 and the product grade of Grade-A, Grade-B and Grade-C.

2 Normative References

The contents of the following documents constitute indispensable clauses of this document through the normative references in this text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 3 Run-outs, Undercuts and Chamfers for General Purpose Metric Screw Threads

GB/T 90.1 Fasteners - Acceptance Inspection

GB/T 90.2 Fasteners - Marking and Packaging

GB/T 193 General Purpose Metric Screw Threads - General Plan

GB/T 1237 Designation System for Fasteners

GB/T 1800.1 Geometrical Product Specifications (GPS) - ISO Code System for Tolerances on Linear Sizes - Part 1: Basis of Tolerances, Deviations and Fits

GB/T 3098.1 Mechanical Properties of Fasteners - Bolts, Screws and Studs

GB/T 3098.6 Mechanical Properties of Fasteners - Stainless Steel Bolts, Screws and Studs

GB/T 3103.1 Tolerances for Fasteners - Bolts, Screws, Studs and Nuts

GB/T 5267.1 Fasteners - Electroplated Coatings

GB/T 5267.2 Fasteners - Non-electrolytically Applied Zinc Flake Coatings

GB/T 5267.3 Fasteners - Hot Dip Galvanized Coatings

GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Descriptions of Dimensions

GB/T 5779.1 Fasteners - Surface Discontinuities - Bolts, Screws and Studs for General Requirements

GB/T 9145 General Purpose Metric Screw Threads - Limits of Sizes for the Screw Threads of Medium Quality and Preferable Plan

GB/T 9146 General Purpose Metric Screw Threads - Limits of Sizes for the Screw Threads of Coarse Quality and Preferable Plan

GB/T 12362 Steel Die Forgings - Tolerance and Machining Allowance

GB/T 16938 Fasteners - General Requirements for Bolts, Screws, Studs and Nuts

3 Terms and Definitions

This document does not have terms or definitions that need to be defined.

4 Types and Dimensions

The types and dimensions of the bolts are shown in Figure 1, Table 1 and Table 2.

The symbols and descriptions of dimensions shall comply with GB/T 5276. […]