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Unit:inch

Hexagon Keys

ASME B 18.3 - 2012

Display drawing:

美标ASME B18.3 - 2012 ASME18.3 18.3ASME Hexagon Keys

Size

-

-

-

1/16

5/64

3/32

7/64

1/8

9/64

5/32

3/16

7/32

1/4

5/16

3/8

Nominal Key or Bit and Socket Size
s		max
		min
e		max
		min
L₂		max
		min
L₁		Short	max
			min
		Long	max
			min
Minimum Torsion load in.-lb

0.028	0.035	0.05	0.062	0.078	0.094	0.109	0.125	0.141	0.156	0.188	0.219	0.25	0.312	0.375
0.0280	0.0350	0.0500	0.0625	0.0781	0.0937	0.1094	0.1250	0.1406	0.1562	0.1875	0.2187	0.2500	0.3125	0.3750
0.0275	0.0345	0.0490	0.0615	0.0771	0.0927	0.1079	0.1235	0.1391	0.1547	0.1860	0.2172	0.2485	0.3110	0.3735
0.0314	0.0393	0.0560	0.0701	0.0880	0.1058	0.1238	0.1418	0.1593	0.1774	0.2135	0.2490	0.2845	0.3570	0.4285
0.0300	0.0378	0.0540	0.0680	0.0859	0.1035	0.1210	0.1390	0.1566	0.1745	0.2105	0.2460	0.2815	0.3531	0.4238
0.312	0.438	0.625	0.656	0.703	0.750	0.797	0.844	0.891	0.938	1.031	1.125	1.219	1.344	1.469
0.125	0.250	0.438	0.469	0.516	0.562	0.609	0.656	0.703	0.750	0.844	0.938	1.031	1.156	1.281
1.312	1.312	1.750	1.844	1.969	2.094	2.219	2.344	2.469	2.594	2.844	3.094	3.344	3.844	4.344
1.125	1.125	1.562	1.656	1.781	1.906	2.031	2.156	2.281	2.406	2.656	2.906	3.156	3.656	4.156
2.688	2.766	2.938	3.094	3.281	3.469	3.656	3.844	4.031	4.219	4.594	4.969	5.344	6.094	6.844
2.500	2.578	2.750	2.906	3.094	3.281	3.469	3.656	3.844	4.031	4.406	4.781	5.156	5.906	6.656
0.94	1.8	5.25	10.25	20	35	55	82	118	160	278	440	665	1275	2200

Size

7/16

1/2

9/16

5/8

3/4

7/8

1

1-1/4

1-1/2

1-3/4

2

2-1/4

2-3/4

3

Nominal Key or Bit and Socket Size
s		max
		min
e		max
		min
L₂		max
		min
L₁		Short	max
			min
		Long	max
			min
Minimum Torsion load in.-lb

0.438	0.5	0.562	0.625	0.75	0.875	1	1.25	1.5	1.75	2	2.25	2.75	3
0.4375	0.5000	0.5625	0.6250	0.7500	0.8750	1.0000	1.2500	1.5000	1.7500	2.0000	2.2500	2.7500	3.0000
0.4355	0.4975	0.5600	0.6225	0.7470	0.8720	0.9970	1.2430	1.4930	1.7430	1.9930	2.2430	2.7420	2.9920
0.5005	0.5715	0.6420	0.7146	0.8580	1.0020	1.1470	1.4337	1.7204	2.0072	2.2939	2.5807	3.1541	3.4409
0.4944	0.5650	0.6356	0.7080	0.8512	0.9931	1.1350	1.4138	1.6981	1.9825	2.2668	2.5511	3.1187	3.4030
1.594	1.719	1.844	1.969	2.219	2.469	2.719	3.250	3.750	4.250	4.750	5.250	6.250	6.750
1.406	1.531	1.656	1.781	2.031	2.281	2.531	2.750	3.250	3.750	4.250	4.750	5.750	6.250
4.844	5.344	5.844	6.344	7.344	8.344	9.344	11.500	13.500	15.500	17.500	19.500	23.500	25.500
4.656	5.156	5.656	6.156	7.156	8.156	9.156	11.000	13.000	15.000	17.000	19.000	23.000	25.000
7.594	8.344	9.094	9.844	11.344	12.844	14.344	-	-	-	-	-	-	-
7.406	8.156	8.906	9.656	11.156	12.656	14.156	-	-	-	-	-	-	-
3500	5200	6500	9000	15500	24600	28800	-	-	-	-	-	-	-

Alternative history

ASME B 18.3 - 2003(R2008) ASME B 18.3 - 2012

Similar Standards

1		[ISO] ISO 2936 - 2014	Assembly Tools For Screws And Nuts—Hexagon Socket Screw Keys
2		[ISO] ISO 2936 - 1995	Hex keys
3		[ANSI] ANSI B 18.3.2M - 1979 (R2003)	Metric Hexagon Keys
4		[DIN] DIN 911 - 1987	Hexagon Keys
5		[DIN ISO] DIN ISO 2936 - 2016	Hexagon Socket Screw Keys
6		[DIN] DIN 6911 - 2004	Hexagon socket screw keys with pilot
7		[ASME] ASME B 18.3 - 2003 (R2008)	Hexagon Keys
8		[DIN] DIN 6911 - 1986	Hexagon socket screw keys with pilot
9		[ISO] ISO 2936 - 2001	Assembly Tools For Screws And Nuts - Hexagon Socket Screw Keys
10		[GB] GB /T 5357 - 1998	Hexagon spline wrenches
11		[JIS] JIS B 4648 - 2008	Hexagon Scoket Screws Key
12		[GB] GB /T 5356 - 2021	Hexagon Socket Screw Keys
13		[GB] GB 5356 - 1985	Hexagon Socket Screw Keys
14		[BS] BS 2470 - 1973	Hexagon Keys
15		[UNI] UNI 6753	Hexagon Keys For Socket Hex Screws
16		[GB] GB /T 5356 - 2008	Hexagon Socket Screw Keys