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GB/T 32.2-2025 English PDF

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GB/T 32.2-2025: Fasteners - Hexagon head bolts with split pin hole on head - Part 2: Reduced shank - Product grade B
Status: Valid

GB/T 32.2: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 32.2-2025	English	209	Add to Cart	3 days [Need to translate]	Fasteners - Hexagon head bolts with split pin hole on head - Part 2: Reduced shank - Product grade B	Valid	GB/T 32.2-2025
GB/T 32.2-1988	English	119	Add to Cart	2 days [Need to translate]	Hexagon bolts with wire holes on head. Reduced shank. Product grade B		GB/T 32.2-1988

Standard similar to GB/T 32.2-2025

GB/T 32.1 GB/T 32.3 GBZ 32

Basic data

Standard ID	GB/T 32.2-2025 (GB/T32.2-2025)
Description (Translated English)	Fasteners - Hexagon head bolts with split pin hole on head - Part 2: Reduced shank - Product grade B
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J13
Classification of International Standard	21.060.10
Word Count Estimation	10,173
Date of Issue	2025-10-05
Date of Implementation	2026-02-01
Older Standard (superseded by this standard)	GB/T 32.2-1988
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China

GB/T 32.2-2025: Fasteners - Hexagon head bolts with split pin hole on head - Part 2: Reduced shank - Product grade B

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 21.060.10 CCSJ13 National Standards of the People's Republic of China Replaces GB/T 32.2-1988 Fastener hexagonal head bolt with hole Part 2.Thin Rods, Grade B Part 2.Reducedshank-ProductgradeB Published on 2025-10-05 Implemented on February 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Preface III Introduction IV 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Type and Dimensions 1 5.Technical Requirements 2 6.Signs and Labels 3 7 Mark 3 Reference 4

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document is Part 2 of the GB/T 32 series of national standards "Hexagonal Head Bolts with Holes". GB/T 32 has already published the following... part. ---GB/T 32.1 Hexagonal head bolts with holes; ---GB/T 32.2 Fasteners - Hexagonal Head Bolts with Holes - Part 2.Fine Rods, Class B; ---GB/T 32.3 Hexagonal head bolts with holes, fine thread. This document replaces GB/T 32.2-1988 "Hexagonal Head Bolts with Holes, Fine Rods, Grade B". Compared with GB/T 32.2-1988, except for... Aside from structural adjustments and editorial changes, the main technical changes are as follows. a) In accordance with GB/T 5784, specifications M7 and M18 have been added (see Table 1); b) A table of technical requirements and referenced standards has been added (see Table 2); c) Added signs and labels (see Chapter 6). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Fastener Standardization Technical Committee (SAC/TC85). This document was drafted by. Ningbo Jiulong Chuangzhan Fasteners Co., Ltd., China Machinery Productivity Promotion Center Co., Ltd., and CGN Wind Power. Limited Liability Company, Shandong Jiujia Fasteners Co., Ltd. This document is subject to interpretation by the National Fastener Standardization Technical Committee. The release history of this document and the document it replaces is as follows. ---First published in 1958 as GB/T 32-1958, and first revised in 1976; ---In the second revision in 1988, it was incorporated into GB/T 25-1976 "Small Hexagonal Head Bolts with Holes" (GB/T 25-1976). The previous versions were released as follows. GB/T 25-1958, GB/T 25-1966, and GB/T 26-1976 "Small Hexagonal Headband". The previous versions of the standard GB/T 26-1976 (Guide Neck Bolt) are. GB/T 26-1958, GB/T 26-1966. Some content has been revised to GB/T 32.2-1988; ---This is the third revision.

Introduction

The GB/T 32 series of national standards, "Hexagonal head bolts with holes," aims to standardize the types, dimensions, and technical requirements of hexagonal head bolts with holes. The requirement consists of the following three parts. ---GB/T 32.1 Hex head bolts with holes. The purpose is to standardize hex head bolts with holes for product grades A and B. The type, size, technical requirements, markings, labels and markings of the bolt. ---GB/T 32.2 Fasteners - Hexagonal Head Bolts with Holes - Part 2.Fine Rods, Class B. The purpose is to standardize product grades. Type, dimensions, technical requirements, markings, labels and markings for Class B thin-bar hexagonal head bolts with holes. ---GB/T 32.3 Fine thread hexagonal head bolts with holes. The purpose is to standardize fine thread hexagonal head bolts of grades A and B. Types, dimensions, technical requirements, markings, labels, and markings of bolts with holes in the head. Hexagonal head bolts with holes are commonly used to prevent loosening of mechanical fasteners; that is, they are used to secure bolts together to prevent loosening. Loose. During installation, insert a low-carbon metal wire into the head hole of the hexagonal head bolt to connect several bolts together and lock them in place, providing a good anti-loosening effect. For densely packed bolted connections that are not frequently disassembled. Fastener hexagonal head bolt with hole Part 2.Thin Rods, Grade B

1 Scope

This document specifies the type, dimensions, technical requirements, markings, labels, and markings for hexagonal head bolts with holes. This document applies to thread sizes from M6 to M20, performance grades of 5.8, 6.8, 8.8, A2-50, and A2-70, with a shank diameter approximately equal to the thread diameter. Medium diameter, grade B coarse thread hexagonal head bolt with hole (hereinafter referred to as bolt). The bolts specified in this document have wire holes drilled in their heads, conforming to GB/T 5784 standards.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 90.1 Acceptance Inspection of Fasteners GB/T 90.2 Fastener marking and packaging GB/T 197 Tolerances for Standard Threads GB/T 1237 Fastener Marking Method 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 3099.4 Fastener Terminology - Control, Inspection, Delivery, Acceptance and Quality GB/T 3103.1 Fastener Tolerances - Bolts, Screws and Nuts GB/T 5267.1 Electroplating coatings for fasteners GB/T 5267.2 Non-electrolytic zinc sheet coating for fasteners GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Size Designations and Markings GB/T 5278 Cotter pin holes and wire holes for fasteners GB/T 5779.1 Surface defects in fasteners - General requirements for bolts, screws and studs GB/T 5784 Fasteners - Hexagonal Head Bolts - Fine Rods - Class B GB/T 16938 General technical conditions for fasteners, bolts, screws, studs and nuts

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Type and Dimensions The type of bolt shall be as shown in Figure 1, the dimensions shall be as shown in Table 1, and the other types and dimensions shall be as specified in GB/T 5784. Dimension codes and markings shall conform to GB/T 5276.

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