Hypodermic tubing is welded and drawn to tight OD and ID tolerances, and is sold and stocked in gauge sizes.
MicroGroup maintains both 304 stainless steel and 316 stainless steel tubing in stock, typically in full-hard temper condition. 304 stainless steel hypodermic tubing is stocked in all sizes and wall thicknesses. 316 stainless steel hypodermic tubing is stocked in all gauges but primarily stocked in Regular Wall (RW) and Thin Wall (TW).

MicroGroup hypodermic tubing is ideal for medical and industrial components applications that require strength, uniformity, and corrosion resistance. Not manufactured for pressure service. Wide selection, economical and quick delivery.

Please Specify Hypodermic Tubing By:

Hypodermic Tubing Info
For sizes or alloys not listed below, or to place an order,
call 800-All-Tube

To purchase standard stock tubing please visit our       Online Store 

MicroGroup Complete Hypodermic Tubing Listing and Specifications

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Gauge Size Nominal Inches OD ID 304 SS  Item # 316 SS  Item #
OD Wall ID Min Max Min Max
3 RW .259 .02 .219 .257 .261 .216 .222 304H03RW
3 TW .259 .015 .229 .257 .261 .227 .231 304H03TW
3 X .259 .01 .239 .257 .261 .237 .241 304H03X
4 RW .238 .02 .198 .236 .24 .195 .201 304H04RW 316H04RW
4 TW .238 .015 .208 .236 .24 .206 .21 304H04TW
4 TW .238 .01 .218 .236 .24 .216 .22 304H04TW
5 RW .219 .015 .189 .217 .221 .186 .192 304H05RW
5 X .219 .007 .205 .217 .221 .203 .207 304H05X
6 RW .2030 .015 .173 .2020 .2040 .1700 .1760 304H06RW 316H06RW
6 TW .2030 .010 .183 .2020 .2040 .1810 .1850 304H06TW 316H06TW
6 X .2030 .007 .189 .2020 .2040 .1870 .1910 304H06X
6.5 .1880 .010 .168 .1870 .1890 .1650 .1710 304H06.5
7 RW .1800 .015 .150 .1790 .1810 .1470 .1530 304H07RW 316H07RW
7 TW .1800 .010 .160 .1790 .1810 .1580 .1620 304H07TW
7 X .1800 .007 .166 .1790 .1810 .1640 .1680 304H07X
7 XX .1800 .004 .173 .1790 .1810 .1720 .1740 304H07XX
7.5 .1720 .011 .150 .1710 .1730 .1470 .1530 304H07.5
8 RW .1650 .015 .135 .1640 .1660 .1320 .1380 304H08RW 316H08RW
8 TW .1650 .010 .145 .1640 .1660 .1430 .1470 304H08TW
8 XX .1650 .007 .150 .1640 .1660 .1475 .1530 304H08XX
8.5 .1560 .010 .136 .1550 .1570 .1330 .1390 304H08.5
9 RW .1480 .015 .118 .1470 .1490 .1150 .1210 304H09RW 316H09RW
9 TW .1480 .010 .128 .1470 .1490 .1260 .1300 304H09TW 316H09TW
9 XX .1480 .007 .135 .1470 .1490 .1330 .1370 304H09XX
9 UX .1480 .005 .138 .1470 .1490 .1360 .1400 304H09UX
9.5 .1410 .011 .119 .1400 .1420 .1170 .1210 304H09.5
10 RW .1340 .014 .106 .1330 .1350 .1040 .1080 304H10RW 316H10RW
10 TW .1340 .010 .114 .1330 .1350 .1120 .1160 304H10TW 316H10TW
10 X .1340 .008 .118 .1330 .1350 .1165 .1200 304H10X
10 XX .1340 .006 .122 .1330 .1350 .1200 .1240 304H10XX
10.5 .1260 .010 .106 .1250 .1270 .1040 .1080 304H10.5
11 RW .1200 .013 .094 .1190 .1210 .0920 .0960 304H11RW 316H11RW
11 TW .1200 .010 .100 .1190 .1210 .0980 .1020 304H11TW 316H11TW
11 X .1200 .007 .106 .1190 .1210 .1040 .1080 304H11X
11 XX .1200 .004 .112 .1190 .1210 .1100 .1140 304H11XX
11.5 .1150 .010 .095 .1140 .1160 .0930 .0960 304H11.5
12 H .1090 .016 .077 .1080 .1100 .0750 .0790 304H12H
12 RW .1090 .012 .085 .1080 .1100 .0830 .0870 304H12RW 316H12RW
12 TW .1090 .009 .091 .1080 .1100 .0890 .0930 304H12TW 316H12TW
12 X .1090 .006 .097 .1080 .1100 .0950 .0990 304H12X
12 XX .1090 .005 .100 .1080 .1100 .0990 .1010 304H12XX
12.5 .1000 .009 .082 .0990 .1010 .0800 .0840 304H12.5
13 RW .0950 .012 .071 .0940 .0960 .0690 .0730 304H13RW 316H13RW
13 TW .0950 .009 .077 .0940 .0960 .7500 .0790 304H13TW 316H13TW
Gauge Size Nominal Inches OD ID 304 SS  Item # 316 SS  Item #
OD Wall ID Min Max Min Max
13 X .0950 .005 .085 .0940 .0960 .0840 .0860 304H13X
13 XX .0950 .003 .090 .0940 .0960 .0890 .0910 304H13XX
13.5 .0890 .009 .071 .0880 .0900 .0690 .0730 304H13.5
14 XH .0830 .022 .039 .0820 .0840 .0370 .0410 304H14XH
14 H .0830 .017 .049 .0820 .0840 .0470 .0510 304H14H
14 RW .0830 .010 .063 .0820 .0840 .0610 .0650 304H14RW 316H14RW
14 M .0830 .008 .068 .0820 .0840 .0660 .0690 304H14M
14 TW .0830 .006 .072 .0820 .0840 .0700 .0730 304H14TW 316H14TW
14 XX .0830 .003 .077 .0820 .0840 .0760 .0780 304H14XX
14.5 .0780 .008 .063 .0770 .0790 .0620 .0640 304H14.5
15 RW .0720 .009 .054 .0715 .0725 .0525 .0555 304H15RW 316H15RW
15 TW .0720 .006 .060 .0715 .0725 .0585 .0615 304H15TW 316H15TW
15 X .0720 .005 .063 .0715 .0725 .0620 .0640 304H15X
15 S .0720 .009 .054 .0715 .0725 .0548 .0532 316H15S
15.5 .0680 .007 .054 .0675 .0685 .0525 .0555 304H15.5
16 RW .0650 .009 .047 .0645 .0655 .0455 .0485 304H16RW 316H16RW
16 TW .0650 .006 .053 .0645 .0655 .0525 .0545 304H16TW 316H16TW
16 X .0650 .004 .057 .0645 .0655 .0550 .0580 304H16X
16 XX .0650 .003 .060 .0645 .0655 .0585 .0610 304H16XX
16 H .0650 .016 .033 .0645 .0655 .0310 .0350 304H16H 316H16H
16.5 .0620 .005 .052 .0615 .0625 .0505 .0535 304H16.5 316H16.5
17 RW .0590 .009 .041 .0585 .0595 .0395 .0425 304H17RW 316H17RW
17TW .0590 .007 .046 .0585 .0595 .0445 .0475 304H17TW 316H17TW
17 X .0590 .004 .052 .0585 .0595 .0510 .0530 304H17X
17 XX .0590 .002 .054 .0585 .0595 .0535 .0550 304H17XX
17 S .0580 .008 .042 .0575 .0585 .0405 .0435 304H17S 316H17S
17 SX .0580 .004 .050 .0575 .0585 .0490 .0510 304H17SX
17 H .0590 .010 .039 .0585 .0595 .0370 .0410 304H17H
17.5 .0560 .005 .046 .0555 .0565 .0445 .0475 304H17.5
18 RW .0500 .009 .033 .0495 .0505 .0315 .0345 304H18RW 316H18RW
18 S .0500 .006 .038 .0495 .0505 .0365 .0395 304H18S 316H18S
18 TW .0500 .004 .042 .0495 .0505 .0410 .0430 304H18TW 316H18TW
18 XX .0500 .003 .045 .0495 .0505 .0440 .0460 304H18XX 316H18XX
18 H .0500 .010 .030 .0495 .0505 .0280 .0320 304H18H
18.5 .0460 .006 .034 .0455 .0465 .0325 .0355 304H18.5
19 RW .0425 .008 .028 .0420 .0430 .0260 .0290 304H19RW 316H19RW
Gauge Size Nominal Inches OD ID 304 SS  Item # 316 SS  Item #
OD Wall ID Min Max Min Max
19 TW .0425 .005 .033 .0420 .0430 .0315 .0335 304H19TW 316H19TW
19 X .0425 .004 .035 .0420 .0430 .0340 .0360 304H19X
19 XX .0425 .003 .038 .0420 .0430 .0365 .0385 304H19XX
19 H .0425 .010 .023 .0420 .0430 .0210 .0240 304H19H
19.5 .0390 .006 .027 .0385 .0395 .0255 .0285 304H19.5
20 RW .0355 .006 .024 .0355 .0360 .0230 .0245 304H20RW 316H20RW
20TW .0355 .005 .026 .0355 .0360 .0250 .0265 304H20TW 316H20TW
20 X .0355 .004 .028 .0355 .0360 .0270 .0285 304H20X
20 XX .0355 .003 .031 .0355 .0360 .0295 .0315 304H20XX 316H20XX
20.5 .0340 .004 .027 .0340 .0345 .0255 .0275 304H20.5
21 H .0320 .008 .017 .0320 .0325 .0150 .0180 304H21H
21 RW .0320 .006 .020 .0320 .0325 .0195 .0210 304H21RW 316H21RW
21TW .0320 .005 .023 .0320 .0325 .0220 .0240 304H21TW 316H21TW
21 XX .0320 .002 .029 .0320 .0325 .0280 .0295 304H21XX
21.5 .0300 .003 .024 .0300 .0305 .0230 .0245 304H21.5
22 RW .0280 .006 .016 .0280 .0285 .0155 .0170 304H22RW 316H22RW
22 TW .0280 .004 .020 .0280 .0285 .0190 .0205 304H22TW 316H22TW
22 XX .0280 .002 .024 .0280 .0285 .0230 .0240 304H22XX
22 X .0280 .003 .022 .0280 .0285 .0210 .0225 304H22X
22 XH .0280 .011 .007 .0280 .0285 .0050 .0090 304H22XH
22.5 .0260 .003 .020 .0260 .0265 .0195 .0210 304H22.5
23 RW .0250 .006 .013 .0250 .0255 .0125 .0140 304H23RW 316H23RW
23 TW .0250 .004 .017 .0250 .0255 .0165 .0180 304H23TW 316H23TW
23 XX .0250 .002 .020 .0250 .0255 .0195 .0210 304H23XX
23.5 .0230 .003 .017 .0230 .0235 .0165 .0180 304H23.5
24 RW .0220 .005 .012 .0220 .0225 .0115 .0130 304H24RW 316H24RW
24TW .0220 .004 .014 .0220 .0225 .0135 .0150 304H24TW 316H24TW
24 XX .0220 .003 .016 .0220 .0225 .0155 .0170 304H24XX
24.5 .0210 .002 .016 .0210 .0215 .0155 .0170 304H24.5
25 RW .0200 .005 .010 .0200 .0205 .0095 .0110 304H25RW 316H25RW
25TW .0200 .004 .012 .0200 .0205 .0115 .0130 304H25TW 316H25TW
25 XX .0200 .002 .016 .0200 .0205 .0155 .0170 304H25XX
25.5 .0190 .002 .014 .0190 .0195 .0135 .0150 304H25.5
26 RW .0180 .004 .010 .0180 .0185 .0095 .0110 304H26RW 316H26RW
26 TW .0183 .003 .0123 .0180 .0185 .0115 .0130 304H26TW
26 X .0183 .002 .0138 .0180 .0185 .0130 .0145 304H26X
27 RW .0160 .004 .0080 .0160 .0165 .0075 .0090 304H27RW 316H27RW
27 TW .0163 .003 .0103 .0160 .0165 .0095 .0110 304H27TW
27 X .0163 .0021 .012 .0160 .0165 .0115 .0125 304H27X
28 RW .0140 .003 .007 .0140 .0145 .0065 .0080 304H28RW 316H28RW
28 TW .0143 .0025 .0093 .014 .0145 .0085 .0100 304H28TW
29 RW .0130 .003 .007 .0130 .0135 .0065 .0080 304H29RW 316H29RW
30 XH .0120 .004 .003 .0115 .0125 .0020 .0040 316H30XH
30 H .0120 .004 .004 .0120 .0125 .0035 .0050 304H30H
30 RW .0120 .003 .006 .0120 .0125 .0055 .0070 304H30RW 316H30RW
30 XX .0120 .002 .008 .012 .0125 .0075 .0085 304H30XX
31 RW .0100 .002 .005 .0100 .0105 .0045 .0060 304H31RW 316H31RW
32 RW .0090 .002 .004 .0090 .0095 .0035 .0050 304H32RW
33 RW .0080 .002 .004 .0080 .0085 .0035 .0050 304H33RW
33 X .0080 .001 .006 .0080 .0085 .0060 .0070 304H33X
34 RW .0060 .002 .002 .0060 .0065 .0015 .0030 304H34RW

All dimensions are measured in inches
Please contact our sales office regarding availability.

The Hypodermic Tubing tables on this page have been revised to address the inconsistency of past “standards” which vary by vendor. MicroGroup has attempted to meet as many of these old varied standards as possible in these new tables. Please verify your older prints. Although every effort has been made to ensure accuracy, no guarantee is granted or implied. Unlike other tubing and pipe sizes, hypodermic tubing is specified by a gauge number that determines OD and ID of the tube, not the wall thickness.