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Small Diameter Stainless Steel Tubing > Hypodermic Tube gauge chart

Full Hard Temper, Type 304, TIG welded & drawn
All RW, TW, XT, XX, X & 1/2 gauges stocked in Type 316
(Average Wall is reference dimension)
NOMINAL (IN) TOLERANCES
GAUGE OD ID WALL OD ID
3XT .259 .239 .010 ±.002 ±.002
3TW .259 .229 .015 ±.002 ±.002
3RW .259 .219 .020 ±.002 ±.003
3 ½ .249 .219 .015 ±.001 ±.003
4XT .238 .218 .010 ±.002 ±.002
4TW .238 .208 .015 ±.002 ±.002
4RW .238 .198 .020 ±.002 ±.003
4½ .228 .198 .015 ±.001 ±.003
5XT .219 .205 .007 ±.002 ±.002
5TW .219 .199 .010 ±.002 ±.002
5RW .219 .189 .015 ±.002 ±.003
5½ .211 .189 .011 ±.001 ±.003
6X .203 .189 .007 ±.001 ±.002
6TW .203 .183 .010 ±.001 ±.002
6RW .203 .173 .015 ±.001 ±.003
6½ .188 .168 .010 ±.001 ±.003
GAUGE OD ID WALL OD ID
7XX .180 .173 .0035 ±.001 ±.001
7X .180 .166 .007 ±.001 ±.002
7TW .180 .160 .010 ±.001 ±.002
7RW .180 .150 .015 ±.001 ±.003
7HV .180 .131 .0245 ±.001 ±.003
7½ .172 .150 .011 ±.001 ±.003
8XXX .165 .156 .0045 ±.001 ±.002
8XX .165 .150 .0075 ±.001 ±.0025
8TW .165 .145 .010 ±.001 ±.002
8RW .165 .135 .015 ±.001 ±.003
8HV .165 .117 .024 ±.001 ±.003
8½ .156 .136 .010 ±.001 ±.003
9XXX .148 .137 .0055 ±.001 ±.002
9XX .148 .135 .0065 ±.001 ±.002
9TW .148 .128 .010 ±.001 ±.002
9RW .148 .118 .015 ±.001 ±.003
GAUGE OD ID WALL OD ID
9HV .148 .098 .025 ±.001 ±.003
9½ .141 .119 .011 ±.001 ±.002
10UT .134 .122 .006 ±.001 ±.002
10XT .134 .118 .008 ±.001 ±.002
10TW .134 .114 .010 ±.001 ±.002
10RW .134 .106 .014 ±.001 ±.002
10HV .134 .100 .017 ±.001 ±.002
10½ .126 .106 .010 ±.001 ±.002
11XX .120 .112 .004 ±.001 ±.002
11X .120 .106 .007 ±.001 ±.002
11TW .120 .100 .010 ±.001 ±.002
11RW .120 .094 .013 ±.001 ±.002
11HV .120 .090 .015 ±.001 ±.002
11½ .115 .0945 .0103 ±.001 ±.0015
12XX .109 .100 .0045 ±.001 ±.001
12XT .109 .095 .007 ±.001 ±.002
GAUGE OD ID WALL OD ID
12TW .109 .091 .009 ±.001 ±.002
12RW .109 .085 .012 ±.001 ±.002
12H .109 .077 .016 ±.001 ±.002
12½ .100 .082 .009 ±.001 ±.002
13XX .095 .090 .0025 ±.001 ±.001
13X .095 .085 .005 ±.001 ±.001
13TW .095 .077 .009 ±.001 ±.002
13RW .095 .071 .012 ±.001 ±.002
13HV .095 .064 .0155 ±.001 ±.002
13½ .089 .071 .009 ±.001 ±.002
14XX .083 .077 .003 ±.001 ±.001
14UT .083 .0745 .0043 ±.001 ±.0015
14XT .083 .072 .0055 ±.001 ±.001
14TW .083 .067 .008 ±.001 +.0015/-.001
14RW .083 .063 .010 ±.001 ±.002
14H .083 .049 .017 ±.001 ±.002
GAUGE OD ID WALL OD ID
14XH .083 .039 .022 ±.001 ±.002
14½ .078 .063 .0075 ±.001 ±.001
15XXX .072 .0695 .0012 ±.0005 ±.0005
15UT .072 .0645 .0038 ±.0005 ±.001
15XTS .072 .063 .0045 ±.0005 ±.001
15TW .072 .060 .006 ±.0005 +.0015/-.0005
15RW .072 .054 .009 ±.0005 ±.0015
15H .072 .050 .011 ±.0005 ±.002
15½ .068 .054 .007 ±.0005 ±.0015
16XX .065 .060 .0025 ±.0005 +.001/-.0015
16UT .065 .0575 .0038 ±.0005 ±.001
16XT .065 .055 .005 ±.0005 +.0015/-.0005
16TW .065 .053 .006 ±.0005 +.0015/-.0005
16RW .065 .047 .009 ±.0005 ±.0015
16H .065 .033 .016 ±.0005 ±.002
16½ .062 .052 .005 ±.0005 ±.0015
GAUGE OD ID WALL OD ID
17XX .059 .054 .0025 ±.0005 +.001/-.0005
17SP .059 .041 .009 ±.0005 ±.0015
17H .059 .039 .010 ±.0005 ±.002
17UTS .0585 .052 .0033 +.0005/-.001 ±.001
17XT .058 .050 .004 ±.0005 ±.001
17TW .058 .048 .005 ±.0005 +.0005/-.0015
17RW .058 .042 .008 ±.0005 ±.0015
17½ .056 .046 .005 ±.0005 ±.0015
18XX .050 .045 .0025 ±.0005 ±.001
18UTS .050 .044 .003 +.001/-.0005 +.0015/-.001
18XT .050 .042 .004 ±.0005 ±.001
18TW .050 .038 .006 ±.0005 +.0015/-.0005
18RW .050 .033 .0085 ±.0005 ±.0015
18H .050 .030 .010 ±.0005 ±.002
18½ .046 .034 .006 ±.0005 ±.0015
19XX .0425 .0375 .0025 ±.0005 ±.001
GAUGE OD ID WALL OD ID
19H .0425 .0225 .010 ±.0005 ±.0015
19XT .042 .035 .0035 ±.0005 ±.001
19TW .042 .032 .005 ±.0005 +.0015/-.0005
19RW .042 .027 .0075 ±.0005 ±.0015
19½ .039 .027 .006 ±.0005 ±.0015
20XX .0355 .0305 .0025 +.0005/-0 ±.001
20XT .0355 .0275 .004 +.0005/-0 +.001/-.0005
20TW .0355 .0255 .005 +.0005/-0 +.0015/-0
20RW .0355 .0235 .006 +.0005/-0 +.001/-.0005
20HV .0355 .0195 .008 +.0005/-0 ±.0015
20½ .034 .0265 .0038 +.0005/-0 ±.001
21XX .032 .029 .0015 +.0005/-0 +.0005/-.001
21XT .032 .025 .0035 +.0005/-0 +.001/-.0005
21TW .032 .023 .0045 +.0005/-0 +.001/-.0005
21RW .032 .020 .006 +.0005/-0 +.001/-.0005
21H .032 .0165 .0078 +.0005/-0 ±.0015
GAUGE OD ID WALL OD ID
21½ .030 .024 .003 +.0005/-0 +.0005/-.001
22S .0285 .006 .0113 ±.0005 +.001/-.0005
22XX .028 .0235 .0023 +.0005/-0 ±.0005
22XTS .028 .021 .0035 +.0005/-0 +.001/-.0005
22TW .028 .020 .004 +.0005/-0 +.0005/-.001
22RW .028 .016 .006 +.0005/-0 +.001/-.0005
22½ .026 .0205 .0028 +.0005/-0 +.0005/-.001
23HV .0255 .005 .0103 ±.0005 ±.001
23XX .025 .020 .0025 +.0005/-0 +.001/-.0005
23TW .025 .017 .004 +.0005/-0 +.001/-.0005
23RW .025 .013 .006 +.0005/-0 +.001/-.0005
23½ .023 .0175 .0028 +.0005/-0 +.0005/-.001
24HV .0225 .005 .0088 ±.0005 +.001/-.0005
24XX .022 .016 .003 +.0005/-0 +.001/-.0005
24TW .022 .014 .004 +.0005/-0 +.001/-.0005
24RW .022 .012 .005 +.0005/-0 +.001/-.0005
GAUGE OD ID WALL OD ID
24½ .021 .0165 .0023 +.0005/-0 +.0005/-.001
25S .0205 .006 .0073 ±.0005 ±.001
25XX .020 .016 .002 +.0005/-0 +.001/-.0005
25TW .020 .012 .004 +.0005/-0 +.001/-.0005
25RW .020 .010 .005 +.0005/-0 +.001/-.0005
25½ .019 .0145 .0023 +.0005/-0 +.0005/-.001
26S .0185 .0045 .007 ±.0005 +.001/-.0005
26XV .018 .0135 .0023 +.0005/-0 +.001/-.0005
26TW .018 .012 .003 +.0005/-0 +.001/-.0005
26RW .018 .010 .004 +.0005/-0 +.001/-.0005
27XV .016 .0115 .0023 +.0005/-0 +.001/-.0005
27TW .016 .010 .003 +.0005/-0 +.001/-.0005
27RW .016 .008 .004 +.0005/-0 +.001/-.0005
28XV .014 .0105 .0018 +.0005/-0 +.001/-.0005
28TW .014 .009 .0025 +.0005/-0 +.001/-.0005
28RW .014 .007 .0035 +.0005/-0 +.001/-.0005
GAUGE OD ID WALL OD ID
29RW .013 .007 .003 +.0005/-0 +.001/-.0005
30RW .012 .006 .003 +.0005/-0 +.001/-.0005
31RW .010 .005 .0025 +.0005/-0 +.001/-.0005
32RW .009 .004 .0025 +.0005/-0 +.001/-.0005
33RW .008 .004 .002 +.0005/-0 +.001/-.0005
34RW .007 .003 .002 +.0005/-0 +.001/-.0005
35RW .005 .002 .0015 +.0005/-0 +.001/-.0005
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