Needle gauge comparison chart: Difference between revisions

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| colspan="3" | '''Nominal Outer Diameter'''
| colspan="3" | '''Nominal Outer Diameter'''
| colspan="3" | '''Nominal Inner Diameter'''
| colspan="3" | '''Nominal Inner Diameter'''
| colspan="3" | '''Nominal Wall Thickness'''
|-  
|-  
| align=center | ''Gauge''
| align=center | ''Gauge''
| align=center | ''inches''
| align=center | ''mm''
| align=center | ''mm''
| align=center | ''tol. inches (mm)''
| align=center | ''inches''
| align=center | ''inches''
| align=center | ''tol. (in.)''
| align=center | ''mm''
| align=center | ''mm''
| align=center | ''tol. inches (mm)''
| align=center | ''inches''
| align=center | ''inches''
| align=center | ''tol. (in.)''
| align=center | ''mm''
| align=center | ''tol. inches (mm)''
|- align="center"
| 7
| 0.180
| 4.572
| ±0.001 (±0.025)
| 0.150
| 3.810
| ±0.003 (±0.076)
| 0.015
| 0.381
| ±0.001 (±0.025)
|- align="center"
| 8
| 0.165
| 4.191
| "
| 0.135
| 3.429
| "
| "
| "
| "
|- align="center"
| 9
| 0.148
| 3.759
| "
| 0.118
| 2.997
| "
| "
| "
| "
|- align="center"
|- align="center"
| 10
| 10
| 0.134
| 3.404
| 3.404
| 0.1340
| "
| ±0.0010
| 0.106
| 2.692
| 2.692
| 0.1060
| "
| ±0.0020
| 0.014
| 0.356
| "
|- align="center"
|- align="center"
| 11
| 11
| 0.120
| 3.048
| 3.048
| 0.1200
| "
| "
| 0.094
| 2.388
| 2.388
| 0.0940
| "
| 0.013
| 0.330
| "
| "
|- align="center"
|- align="center"
| 12
| 12
| 0.109
| 2.769
| 2.769
| 0.1090
| "
| "
| 0.085
| 2.159
| 2.159
| 0.0850
| "
| 0.012
| 0.305
| "
| "
|- align="center"
|- align="center"
| 13
| 13
| 0.095
| 2.413
| 2.413
| 0.0950
| "
| "
| 0.071
| 1.803
| 1.803
| 0.0710
| "
| "
| "
| "
| "
|- align="center"
|- align="center"
| 14
| 14
| 0.083
| 2.108
| 2.108
| 0.0830
| "
| "
| 0.063
| 1.600
| 1.600
| 0.0630
| "
| 0.01
| 0.254
| "
| "
|- align="center"
|- align="center"
| 15
| 15
| 0.072
| 1.829
| 1.829
| 0.0720
| ±0.0005 (±0.013)
| ±0.0005
| 0.054
| 1.372
| 1.372
| 0.0540
| ±0.0015 (±0.038)
| ±0.0015
| 0.009
| 0.229
| ±0.0005 (±0.013)
|- align="center"
|- align="center"
| 16
| 16
| 0.065
| 1.651
| 1.651
| 0.0650
| "
| "
| 0.047
| 1.194
| 1.194
| 0.0470
| "
| "
| "
| "
| "
|- align="center"
|- align="center"
| 17
| 17
| 0.058
| 1.473
| 1.473
| 0.0580
| "
| "
| 0.042
| 1.067
| 1.067
| 0.0420
| "
| 0.008
| 0.203
| "
| "
|- align="center"
|- align="center"
| 18
| 18
| 0.050
| 1.270
| 1.270
| 0.0500
| "
| "
| 0.033
| 0.838
| 0.838
| 0.0330
| "
| 0.0085
| 0.216
| "
| "
|- align="center"
|- align="center"
| 19
| 19
| 0.042
| 1.067
| 1.067
| 0.0420
| "
| "
| 0.027
| 0.686
| 0.686
| 0.0270
| "
| 0.0075
| 0.191
| "
| "
|- align="center"
|- align="center"
| valign=TOP | 20
| 20
| valign=TOP | 0.902
| 0.03575
| valign=TOP | 0.0355
| 0.9081
| valign=TOP | +0.0005<br>
| ±0.00025 (±0.0064)
-0.0000
| 0.02375
| valign=TOP | 0.584
| 0.603
| valign=TOP | 0.0230
| ±0.00075 (±0.019)
| valign=TOP | +0.0015<br>
| 0.006
-0.0000
| 0.1524
| ±0.00025 (±0.0064)
|- align="center"
|- align="center"
| 21
| 21
| 0.813
| 0.03225
| 0.0320
| 0.8192
| "
| 0.02025
| 0.514
| "
| "
| "
| "
| 0.495
| 0.0195
| "
| "
|- align="center"
|- align="center"
| 22
| 22
| 0.711
| 0.02825
| 0.0280
| 0.7176
| "
| 0.01625
| 0.413
| "
| "
| "
| "
| 0.394
| 0.0155
| "
| "
|- align="center"
|- align="center"
| 22s
| 22s
| 0.711
| 0.0280
| "
| "
| 0.140
| "
| 0.0055
| "
| 0.006
| 0.152
| "
| 0.0111
| 0.2826
| "
| "
|- align="center"
|- align="center"
| 23
| 23
| 0.635
| 0.02525
| 0.0250
| 0.6414
| "
| 0.01325
| 0.337
| "
| "
| 0.318
| 0.006
| 0.0125
| 0.1524
| "
| "
|- align="center"
|- align="center"
| 24
| 24
| 0.559
| 0.02225
| 0.0220
| 0.5652
| "
| "
| 0.292
| 0.01225
| 0.0115
| 0.311
| "
| 0.005
| 0.1270
| "
| "
|- align="center"
|- align="center"
| 25
| 25
| 0.508
| 0.02025
| 0.0200
| 0.5144
| "
| 0.01025
| 0.260
| "
| "
| 0.241
| 0.0095
| "
| "
|- align="center"
| 25s
| 0.508
| 0.0200
| "
| "
| 0.140
| 0.0055
| "
| "
|- align="center"
|- align="center"
| 26
| 26
| 0.457
| 0.01825
| 0.0180
| 0.4636
| "
| "
| 0.241
| "
| 0.0095
| "
| "
| 0.004
| 0.1016
| "
| "
|- align="center"
|- align="center"
| 26s
| 26s
| 0.467
| 0.01865
| 0.0184
| 0.4737
| "
| "
| 0.114
| 0.005
| 0.0045
| 0.127
| "
| "
| 0.0068
| 0.1734
|- align="center"
|- align="center"
| 27
| 27
| 0.406
| 0.01625
| 0.0160
| 0.4128
| "
| 0.00825
| 0.210
| "
| "
| 0.191
| 0.004
| 0.0075
| 0.1016
| "
| "
|- align="center"
|- align="center"
| 28
| 28
| 0.356
| 0.01425
| 0.0140
| 0.3620
|  "
|  "
| 0.165
| 0.00725
| 0.0065
| 0.184
| "
| 0.0035
| 0.0889
| "
| "
|- align="center"
|- align="center"
| 29
| 29
| 0.330
| 0.01325
| 0.0130
| 0.3366
| "
| "
| "
| "
| "
| 0.165
| 0.003
| 0.0065
| 0.0762
| "
| "
|- align="center"
|- align="center"
| 30
| 30
| 0.305
| 0.01225
| 0.0120
| 0.3112
| "
| 0.00625
| 0.159
| "
| "
| "
| "
| 0.140
| 0.0055
| "
| "
|- align="center"
|- align="center"
| 31
| 31
| 0.254
| 0.01025
| 0.0100
| 0.2604
| "
| 0.00525
| 0.133
| "
| "
| 0.114
| 0.0025
| 0.0045
| 0.0635
| "
| "
|- align="center"
|- align="center"
| 32
| 32
| 0.229
| 0.00925
| 0.0090
| 0.2350
| "
| 0.00425
| 0.108
| "
| "
| "
| "
| 0.089
| 0.0035
| "
| "
|- align="center"
|- align="center"
| 33
| 33
| 0.203
| 0.00825
| 0.0080
| 0.2096
| "
| "
| "
| "
| 0.002
| 0.0508
| "
|- align="center"
| 34
| 0.00725
| 0.1842
| "
| 0.00325
| 0.0826
| "
| "
| "
| "
| 0.089
| 0.0035
| "
| "
|}  
|}  

Revision as of 01:07, 12 March 2009

Hypodermic needles are available in a wide variety of outer diameters described by gauge numbers. Smaller gauge numbers indicate larger outer diameters. Inner diameter depends on both gauge and wall thickness. The following chart shows nominal inner diameter and wall thickness for regular-wall needles. Thin-wall needles (not shown) have identical outer diameters but larger inner diameters for a given gauge.

Needle Nominal Outer Diameter Nominal Inner Diameter Nominal Wall Thickness
Gauge inches mm tol. inches (mm) inches mm tol. inches (mm) inches mm tol. inches (mm)
7 0.180 4.572 ±0.001 (±0.025) 0.150 3.810 ±0.003 (±0.076) 0.015 0.381 ±0.001 (±0.025)
8 0.165 4.191 " 0.135 3.429 " " " "
9 0.148 3.759 " 0.118 2.997 " " " "
10 0.134 3.404 " 0.106 2.692 " 0.014 0.356 "
11 0.120 3.048 " 0.094 2.388 " 0.013 0.330 "
12 0.109 2.769 " 0.085 2.159 " 0.012 0.305 "
13 0.095 2.413 " 0.071 1.803 " " " "
14 0.083 2.108 " 0.063 1.600 " 0.01 0.254 "
15 0.072 1.829 ±0.0005 (±0.013) 0.054 1.372 ±0.0015 (±0.038) 0.009 0.229 ±0.0005 (±0.013)
16 0.065 1.651 " 0.047 1.194 " " " "
17 0.058 1.473 " 0.042 1.067 " 0.008 0.203 "
18 0.050 1.270 " 0.033 0.838 " 0.0085 0.216 "
19 0.042 1.067 " 0.027 0.686 " 0.0075 0.191 "
20 0.03575 0.9081 ±0.00025 (±0.0064) 0.02375 0.603 ±0.00075 (±0.019) 0.006 0.1524 ±0.00025 (±0.0064)
21 0.03225 0.8192 " 0.02025 0.514 " " " "
22 0.02825 0.7176 " 0.01625 0.413 " " " "
22s " " " 0.006 0.152 " 0.0111 0.2826 "
23 0.02525 0.6414 " 0.01325 0.337 " 0.006 0.1524 "
24 0.02225 0.5652 " 0.01225 0.311 " 0.005 0.1270 "
25 0.02025 0.5144 " 0.01025 0.260 " " " "
26 0.01825 0.4636 " " " " 0.004 0.1016 "
26s 0.01865 0.4737 " 0.005 0.127 " 0.0068 0.1734
27 0.01625 0.4128 " 0.00825 0.210 " 0.004 0.1016 "
28 0.01425 0.3620 " 0.00725 0.184 " 0.0035 0.0889 "
29 0.01325 0.3366 " " " " 0.003 0.0762 "
30 0.01225 0.3112 " 0.00625 0.159 " " " "
31 0.01025 0.2604 " 0.00525 0.133 " 0.0025 0.0635 "
32 0.00925 0.2350 " 0.00425 0.108 " " " "
33 0.00825 0.2096 " " " " 0.002 0.0508 "
34 0.00725 0.1842 " 0.00325 0.0826 " " " "

See also

External links

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