GB/T 4388-1995 Types of open-end spanners, box spanners and combination spanners GB/T4388-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Types of open-end wrenches, box wrenches and combination wrenches GB/T 4388-1995
Replaces GB4388--84
This standard adopts the international standards ISO10102:1990 "Assembly tools for screws and nuts-IS010103:1990 "Assembly tools for screws and nuts-Double-head open-end wrenches"
-Double-head straight neck and bent neck box wrenches", ISO10104:1990 "Assembly tools for screws and nuts-Double-head high-necked and low-necked box wrenches" and ISO7738:1990 "Combination wrenches". 1 Subject content and scope of application
This standard specifies the types of open-end wrenches, box wrenches and combination wrenches. This standard applies to the fixed-end wrenches, box end wrenches and combination wrenches specified in GB/T4625 (numbered 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 and 14 respectively).
2 Reference standards
GB/T4625
Terms of assembly tools for screws and nuts
3 Product classification
3.1 Fixed-end wrenches are divided into two types: double-end fixed-end wrenches and single-end fixed-end wrenches (see Figures 1 and 2). Their overall length L and head thickness H are as specified in Tables 1 and 2.
Figure 1 Double-ended open-end wrench
Approved by the State Bureau of Technical Supervision on October 24, 1995 and implemented on July 1, 1996
10×11
10×12
10×13
11×13
12×13
12×14
13×14
13×15
13×16
13×17
14×15
14×16
14×17
Hicmn)
GB/T 4388—1995
Single-end wrench
Double-end wrench
Li(ain)
H t(mx)
Li(min)
Straight neck, bent neck
H 2(mx)
Double-end box wrench
La(mio)
Explosion neck, high neck
H (max)
La(min)
15×16
15×18
16×17
16×18
17×19
18×19
18×21
19×22
2 0 × 22 | | tt | | 21 × 22 | | tt |
30×34
32×34
32×36
34×36
36×41
41×46
46×50
50×55
55×60
60×65
65×70
70×75
75×80
Hi(n）
GB/T4388--1995
Table 1 continued
Double-ended open-end wrench
Lrmin)
Note: The dimensions in brackets are for reference only during design. Hi(amn)
Limin)
Double-ended box wrench
Straight neck, bent neck
H2(man)
Le(min)
Short neck, high neck
H (ma)wwW.bzxz.Net
L2(min）
Single-ended open end wrench
Hi(max)
Li(ain)
GB/T 4388-1995
Single-ended box wrench
H2 (mx)）
L2(min
Hi(max)
Combination wrench
H2(mx)
Single-ended open end wrench
La min)
GB/T4388-1995
Continued Table 2
Single-head box spanner
H2(max)
L(tain)
Hh(mx)
Combination spanner
H2(max)
3.2 Box spanners are divided into two types: double-head box spanners and single-head box spanners. They are also divided into short-necked and high-necked types (see Figures 3 to 6), as well as straight-necked and bent-necked types (see Figures 7 and 8) according to the shape of the neck. The overall length Lz and head thickness, H2, shall be in accordance with the provisions of Tables 1 and 2. The spanner hole below 6 mm may be made into a hexagonal or dodecagonal shape. 11
GB/T 4388--1995
Figure 3A-type single-head box spanner (short neck)
Figure 4A-type double-head box spanner (short neck)
Figure 5G-type single-head box spanner (high neck)
GB/T4388--1995
Figure 6G-type double-head box spanner (high neck)
Figure 7Z-type double-head box spanner (straight neck)
Figure 8W-type 15° double-head box spanner (bent neck) 13
GB/T4388-1995
3.3 The type of combination spanner is shown in Figure 9. Its overall length L and head thickness H, and H. shall be in accordance with the provisions of Table 2. Combination wrench
Note: ① The opening depth of the fixed wrench should not be less than 0.9S. ② There is no restriction on the shape of the fixed wrench.
Additional remarks:
This standard was proposed by the China Light Industry General Association and is under the jurisdiction of the National Tool Hardware Standardization Center. This standard was drafted by the First Working Group of the Tool Hardware Sub-Technical Committee of the National Hardware Products Standardization Technical Committee. The main drafters of this standard are: Lin Meide, Zhou Zhengmou, and Xue Guicen. This standard was first issued on May 14, 1984. This standard was second issued on October 24, 1995. 1
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