Click Specification

(Non-preferred) dimensions in parentheses.

Two-Head Box Wrenches

GB /T 4388 - 2008

Display drawing:

Size

(6)
×7

7
×8

(8)
×9

8
×10

(9)
×11

10
×11

(10)
×12

10
×13

11
×13

(12)
×13

(12)
×14

(13)
×14

13
×15

s₁
s₂
e	max
L	min

6	7	8	8	9	10	10	10	11	12	12	13	13
7	8	9	10	11	11	12	13	13	13	14	14	15
6.5	7	7.5	8	8.5	8.5	9	9.5	9.5	9.5	9.5	9.5	10
73	81	89	89	97	105	105	105	113	121	121	129	129

Size

13
×16

(13)
×17

(14)
×15

(14)
×16

(14)
×17

15
×16

(15)
×18

(16)
×17

16
×18

(17)
×19

(18)
×19

18
×21

(19)
×22

s₁
s₂
e	max
L	min

13	13	14	14	14	15	15	16	16	17	18	18	19
16	17	15	16	17	16	18	17	18	19	19	21	22
10.5	11	10	10.5	11	10.5	11.5	11	11.5	11.5	11.5	12.5	13
129	129	137	137	137	145	145	153	153	166	174	174	182

Size

(19)
×24

(20)
×22

(21)
×22

(21)
×23

21
×24

(22)
×24

(24)
×26

24
×27

(24)
×30

(25)
×28

(27)
×29

27
×30

(27)
×32

s₁
s₂
e	max
L	min

19	20	21	21	21	22	24	24	24	25	27	27	27
24	22	22	23	24	24	26	27	30	28	29	30	32
13.5	13	13	13	13.5	13.5	15.5	14.5	15.5	15	15	15.5	16
182	190	198	198	198	206	222	222	222	230	246	246	246

Size

(30)
×32

30
×34

(30)
×36

(32)
×34

(32)
×36

34
×36

36
×41

41
×46

46
×50

50
×55

55
×60

s₁
s₂
e	max
L	min

30	30	30	32	32	34	36	41	46	50	55
32	34	36	34	36	36	41	46	50	55	60
16	16.5	17	16.5	17	17	18.5	20	21	22	23.5
275	275	275	291	291	307	323	363	403	435	475

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