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This standard is not equivalent to the international standards ISO 7738: 2001, Assembly tools for screws and nuts - Combination wrenches - Lengths of wrenches and maximum thickness of heads, ISO 10102: 2001, Assembly tools for screws and nuts - Double-headed open-ended engineer's wrenches - Length of wrenches and thickness of the heads, ISO 10103: 2001, Assembly tools for screws and nuts - Double-headed, flat and offset, box wrenches - Length of wrenches and thickness of the heads, ISO 10104: 2001, Assembly tools for screws and nuts - Double-headed, deep offset and modified offset, box wrenches - Length of wrenches and thickness of the heads.
This standard replaces GB/T 4388-1995 Types of open-end wrenches, box wrenches and combination wrenches.
The main differences between this standard and GB/T 4388-1995 are as follows:
——The specifications (s1×s2) of 19×24, 24×26, 27×29 and 30×36 and their corresponding dimensions for double open-end wrenches and double box wrenches are added (Table 1 of 1995 Edition; Table 1 hereof);
The end thickness of short-type double open-ended wrench in the previous standard is deleted, so that the thickness of long-type and short-type wrenches is consistent (Table 1 in 1995 Edition; Table 1 hereof);
——The specifications (s) of 3.2, 4 and 5 for combination wrenches and their corresponding dimensions are added (Table 2 of 1995 Edition; Table 2 hereof);
——The length and end thickness of the dual-purpose wrench are adjusted (Table 2 of 1995 Edition; Table 2 hereof);
——The values for basic dimensions are adjusted (Tables 1 and 2 of 1995 Edition, Tables 1 and 2 hereof).
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of Subcommittee on Tool Hardware of National Technical Committee on Hardware Products of Standardization Administration of China.
The previous editions of the standard are as follows:
——GB 4388-1984 and GB/T 4388-1995.
Types of open-end wrenches, box wrenches and combination wrenches
1 Scope
This standard specifies the types of open-end wrenches, box wrenches and combination wrenches for screwing bolts and nuts or other fasteners. The illustration of this standard is only an example and does not affect the design of products.
This standard is applicable to open-end wrenches, box wrenches and combination wrenches specified in GB/T 4625.
2 Normative references
The following standard contains provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 4625 Assembly tools for screws and nuts - Nomenclature
3 Product classification
3.1 Types and basic dimensions of open-end wrenches
3.1.1 The open-end wrenches are divided into two types: double open-ended wrenches and single open-ended wrenches (see Figures 1 and 2). Where, the double open-ended wrenches can be further divided into short and long types.
Figure 1 Double open-ended wrench
Figure 2 Single open-ended wrench
3.1.2 The specifications and basic dimensions of double open-ended wrenches shall be as specified in Table 1, and that of single open-ended wrenches shall be as specified in Table 2.
Table 1 Dimension combinations and basic dimensions of double open-ended wrenches and double box-ended wrenches
Dimensions in millimeters
Foreword i
1 Scope
2 Normative references
3 Product classification
ICS 25.140.30
J 47
GB
中華人民共和國國家標準
GB/T 4388—2008
代替GB/T 4388-1995
呆扳手、梅花扳手、兩用扳手的型式
Types of open-end wrenches，box wrenches and combination wrenches
(ISO 7738：2001，Assembly tools for screws and nuts—
Combination wrenches—Lengths of wrenches and
maximum thickness of heads，ISO 10102：2001，Assembly tools for
screws and nuts—Double-headed open-ended engineer's wrenches—Length of
wrenches and thickness of the heads，ISO 10103：2001，Assembly tools for
screws and nuts—Double-headed，flat and offset，box wrenches—
Length of wrenches and thickness of the heads，
ISO 10104：2001，Assembly tools for screws and nuts—
Double-headed，deep offset and modified offset，box wrenches—Length of
wrenches and thickness of the heads，NEQ)
2008-12-30發布 2009-09-01實施
中華人民共和國國家質量監督檢驗檢疫總局
中國國家標準化管理委員會 發布
前言
本標準與國際標準ISO 7738：2001《螺釘和螺母的裝配工具 兩用扳手 扳手長度和頭部最大厚度》、ISO 10102：2001《螺釘和螺母的裝配工具 雙頭呆扳手 扳手長度和頭部厚度》、ISO 10103：2001《螺釘和螺母的裝配工具 雙頭直頸和彎頸梅花扳手扳手 長度和頭部厚度》、ISO 10104：2001《螺釘和螺母的裝配工具 雙頭高頸和矮頸梅花扳手 扳手長度和頭部厚度》的一致性程度為非等效。
本標準代替GB/T 4388—1995《呆扳手、梅花扳手、兩用扳手的型式》。
本標準與GB/T 4388—1995相比主要變化如下：
——增加了雙頭呆扳手和雙頭梅花扳手的規格(s1×s2)為19×24、24×26、27×29和30×36及其相應的尺寸(1995版的表1，本版的表1)；
——取消了原標準中短型雙頭呆扳手的頭部厚度，使長型和短型厚度一致(1995版的表1，本版的表1)；
——增加了兩用扳手的規格s為3.2、4和5及其相應的尺寸(1995版的表2，本版的表2)；
——調整了兩用扳手長度和頭部厚度的數值(1995版的表2，本版的表2)；
——對基本尺寸的數值作了調整(1995版的表1和表2，本版的表1和表2)。
本標準由中國輕工業聯合會提出。
本標準由全國五金制品標準化技術委員會工具五金分技術委員會歸口。
本標準所代替標準的歷次版本發布情況為：
——GB 4388—1984；GB/T 4388—1995。
呆扳手、梅花扳手、兩用扳手的型式
1 范圍
本標準規定了扳擰螺栓和螺母或其他緊固件的呆扳手、梅花扳手、兩用扳手的型式。本標準的圖示僅是示例，并不影響對產品的設計。
本標準適用于GB/T 4625中規定的呆扳手、梅花扳手和兩用扳手。
2 規范性引用文件
下列文件中的條款通過本標準的引用而成為本標準的條款。凡是注日期的引用文件，其隨后所有的修改單(不包括勘誤的內容)或修訂版均不適用于本標準，然而，鼓勵根據本標準達成協議的各方研究是否可使用這些文件的最新版本。凡是不注日期的引用文件，其最新版本適用于本標準。
GB/T 4625 螺釘和螺母的裝配工具術語
3 產品分類
3.1 呆扳手的型式和基本尺寸
3.1.1 呆扳手分為雙頭呆扳手和單頭呆扳手兩種型式(見圖1和圖2)，雙頭呆扳手可分為短型和長型兩種長度。
圖1 雙頭呆扳手
圖2 單頭呆扳手
3.1.2 雙頭呆扳手的規格和基本尺寸按表1的規定，單頭呆扳手的規格和基本尺寸按表2的規定。
表1 雙頭呆扳手和雙頭梅花扳手的對邊尺寸組配及基本尺寸 單位為毫米
雙頭呆扳手
雙頭梅花扳手
規格a(對邊尺寸組配)s1×s2
厚度e max
短型
長型
直頸、彎頸
矮頸、高頸
全長l min
厚度e max
a 括號內的對邊尺寸組配為非優先組配。
表2 單頭呆扳手、呆頭梅花扳手、兩用扳手的規格及其基本尺寸 單位為毫米
單頭呆扳手
單頭梅花扳手
兩用扳手
規格s
厚度e max
全長l min
厚度e1 max
厚度e2 max
3.2 梅花扳手的型式和基本尺寸
3.2.1 梅花扳手分為雙頭梅花扳手(如圖3～圖4所示)和單頭梅花扳手(如圖5所示)兩種型式，并按頸部形狀分為矮頸型和高頸型(如圖3、圖5所示)，以及直頸型和彎領型(如圖4所示)。
高頸型(G型)
矮頸型(A型)
圖3 矮頸型和高頸型雙頭梅花扳手
直頸型(Z型)
彎頸型(W型)
圖4 直頸型和彎頸型雙頭梅花板手
矮頸型(A型)
高頸型(G型)
圖5 矮頸型和高頸型單頭梅花扳手
3.2.2 梅花扳手的規格和基本尺寸按表1和表2的規定。
3.3 兩用扳手的型式和基本尺寸
3.3.1 兩用扳手的型式如圖6所示。
A型
B型
圖6 兩用扳手的型式
3.3.2 兩用扳手的規格和基本尺寸按表2的規定。
