Products

Product Information

Standard Product Specifications

M&M provides a significant number of standard tubing options to meet various application requirements. Produced using the highest quality materials and precise manufacturing processes, our standard stainless steel tubing solutions provide a ready to ship resource for our customers.

Materials & Specs / Tubing Charts

Material Specs Gauge 0-5 Material Specs Gauge 6-10 Material Specs Gauge 11-15 Material Specs Gauge 16-20 Material Specs Gauge 21-25 Material Specs Gauge 26-30 Material Specs Gauge 31-35

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Tube Chart 1-2025 Download

Technical Information

Stainless steel is the generic term given to a family of corrosion-resistant and high-temperature steels. Their remarkable corrosion resistance is due to a chromium-rich oxide film that forms on the surface. When enough chromium (more than about 10%) is added to ordinary steel, the oxide on the surface is transformed – it is very thin, virtually invisible, and protective in a wide range of corrosive media. This is what we call stainless steel and there are several different types and many different grades.

The majority of stainless steels contain nickel (Ni), which is added for several reasons particularly to change the crystal structure from ferrite to austenite. Austenitic stainless steels are ductile, tough, and, most importantly, easy to form and weld. These steels are not magnetic in the annealed condition. The most common example is Type 304 (S30400) or “18/8” – the most widely used stainless steel in the world. The lower carbon version, Type 304L (S30403) is always preferred in more corrosive environments where welding is involved. There are numerous applications for this grade of stainless steel.

Molybdenum (Mo) is added to some stainless steels to increase their corrosion resistance. It increases an alloy’s pitting and crevice corrosion resistance. When 2-3% molybdenum is added to Type 304 or 304L, we create Type 316 (S31600) or 316L (S31603) stainless steel. They are sometimes referred to as the medical grades of stainless steel but their range of applications is very wide.

Chemical Composition

Type	C	Si	Mn	P	S	Cr	Ni	Mo
304	0.08	0.75	2	0.04	0.03	18-20	8-11	–
304L	0.03	0.75	2	0.04	0.03	18-20	8-12	–
316	0.08	0.75	2	0.04	0.03	16-18	10-14	2-3
316L	0.03	0.75	2	0.04	0.03	16-18	10-14	2-3

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
3G-RW	0.2570 – 0.2610	0	0.2160 – 0.2220	0.22	0.02
3G-TW	0.2570 – 0.2610	0	0.2270 – 0.2310	0.23	0.015
3G-XTW	0.2570 – 0.2610	0	0.2370 – 0.2410	0.24	0.01
4G-RW	0.2360 – 0.2400	0	0.1950 – 0.2010	0.20	0.02
4G-TW	0.2360 – 0.2400	0	0.2060 – 0.2100	0.21	0.015
4G-XTW	0.2360 – 0.2400	0.238	0.2160 – 0.2200	0.218	0.01
5G-RW	0.2170 – 0.2210	0.219	0.1860 – 0.1920	0.189	0.015
5G-TW	0.2170 – 0.2210	0.219	0.1970 – 0.2010	0.199	0.01
5G-XTW	0.2170 – 0.2210	0.219	0.2030 – 0.2070	0.205	0.007

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
6G-RW	0.2020 – 0.2040	0.203	0.1700 – 0.1760	0.173	0.015
6G-TW	0.2020 – 0.2040	0.203	0.1810 – 0.1850	0.183	0.01
6G-XTW	0.2020 – 0.2040	0.203	0.1870 – 0.1910	0.189	0.007
7G-RW	0.1790 – 0.1810	0.18	0.1470 – 0.1530	0.15	0.015
7G-TW	0.1790 – 0.1810	0.18	0.1580 – 0.1620	0.16	0.01
7G-XTW	0.1790 – 0.1810	0.18	0.1640 – 0.1680	0.166	0.007
8G-RW	0.1640 – 0.1660	0.165	0.1320 – 0.1380	0.135	0.015
8G-TW	0.1640 – 0.1660	0.165	0.1430 – 0.1470	0.145	0.01
8G-XTW	0.1640 – 0.1660	0.165	0.1490 – 0.1530	0.151	0.007
9G-RW	0.1470 – 0.1490	0.148	0.1150 – 0.1210	0.118	0.015
9G-TW	0.1470 – 0.1490	0.148	0.1260 – 0.1300	0.128	0.01
9G-XTW	0.1470 – 0.1490	0.148	0.1330 – 0.1370	0.135	0.0065
9G-UTW	0.1470 – 0.1490	0.148	0.1360 – 0.1400	0.138	0.005
10G-RW	0.1330 – 0.1350	0.134	0.1040 – 0.1080	0.106	0.014
10G-TW	0.1330 – 0.1350	0.134	0.1120 – 0.1160	0.114	0.01
10G-XTW	0.1330 – 0.1350	0.134	0.1160 – 0.1200	0.118	0.008
10G-UTW	0.1330 – 0.1350	0.134	0.1200 – 0.1240	0.122	0.006

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
11G-RW	0.1190 – 0.1210	0.12	0.0920 – 0.0960	0.094	0.013
11G-TW	0.1190 – 0.1210	0.12	0.0980 – 0.1020	0.1	0.01
11G-XTW	0.1190 – 0.1210	0.12	0.1020 – 0.1060	0.104	0.008
11G-UTW	0.1190 – 0.1210	0.12	0.1060 – 0.1100	0.108	0.006
11G-XXTW	0.1190 – 0.1210	0.12	0.1100 – 0.1140	0.112	0.004
12G-RW	0.1080 – 0.1100	0.109	0.0830 – 0.0870	0.085	0.012
12G-TW	0.1080 – 0.1100	0.109	0.0890 – 0.0930	0.091	0.009
12G-XTW	0.1080 – 0.1100	0.109	0.0950 – 0.0990	0.097	0.006
12G-UTW	0.1080 – 0.1100	0.109	0.0970 – 0.1010	0.099	0.005
13G-RW	0.0940 – 0.0960	0.095	0.0690 – 0.0730	0.071	0.012
13G-TW	0.0940 – 0.0960	0.095	0.0750 – 0.0790	0.077	0.009
13G-XTW	0.0940 – 0.0960	0.095	0.0790 – 0.0830	0.081	0.007
13G-UTW	0.0940 – 0.0960	0.095	0.0830 – 0.0870	0.085	0.005
13G-XXTW	0.0940 – 0.0960	0.095	0.0880 – 0.0920	0.09	0.0025
14G-HW	0.0820 – 0.0840	0.083	0.0500 – 0.0540	0.052	0.0155
14G-RW	0.0820 – 0.0840	0.083	0.0610 – 0.0650	0.063	0.01
14G-TW	0.0820 – 0.0840	0.083	0.0660 – 0.0685	0.0673	0.0079
14G-XTW	0.0820 – 0.0840	0.083	0.0710 – 0.0730	0.072	0.0055
14G-UTW	0.0820 – 0.0840	0.083	0.0730 – 0.0760	0.0745	0.0043
14G-XXTW	0.0820 – 0.0840	0.083	0.0750 – 0.0790	0.077	0.003
15G-HW	0.0715 – 0.0725	0.072	0.0480 – 0.0520	0.05	0.011
15G-RW	0.0715 – 0.0725	0.072	0.0525 – 0.0555	0.054	0.009
15G-TW	0.0715 – 0.0725	0.072	0.0595 – 0.0615	0.0605	0.0058
15G-XTW	0.0715 – 0.0725	0.072	0.0620 – 0.0635	0.0628	0.0046
15G-UTW	0.0715 – 0.0725	0.072	0.0635 – 0.0655	0.0645	0.0038
15G-XXTW	0.0715 – 0.0725	0.072	0.0655 – 0.0675	0.0665	0.0028

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
16G-HW	0.0645 – 0.0655	0.065	0.0410 – 0.0430	0.042	0.0115
16G-RW	0.0645 – 0.0655	0.065	0.0455 – 0.0485	0.047	0.009
16G-TW	0.0645 – 0.0655	0.065	0.0525 – 0.0545	0.0535	0.0058
16G-XTW	0.0645 – 0.0655	0.065	0.0550 – 0.0570	0.056	0.0045
16G-UTW	0.0645 – 0.0655	0.0653	0.0565 – 0.0590	0.0578	0.0038
16G-XXTW	0.0645 – 0.0655	0.0653	0.0585 – 0.0605	0.0595	0.0029
17G-HW	0.0585 – 0.0595	0.059	0.0370 – 0.0410	0.039	0.01
17G-RW	0.0575 – 0.0585	0.058	0.0405 – 0.0435	0.042	0.008
17G-TW	0.0575 – 0.0585	0.058	0.0465 – 0.0485	0.0475	0.0053
17G-XTW	0.0575 – 0.0585	0.058	0.0490 – 0.0510	0.05	0.004
17G-UTW	0.0575 – 0.0585	0.058	0.0510 – 0.0530	0.052	0.003
17G-XXTW	0.0585 – 0.0595	0.059	0.0525 – 0.0545	0.0535	0.0028
18G-HW	0.0495 – 0.0505	0.05	0.0285 – 0.0315	0.03	0.01
18G-RW	0.0495 – 0.0505	0.05	0.0315 – 0.0345	0.033	0.0085
18G-TW	0.0495 – 0.0505	0.05	0.0375 – 0.0395	0.0385	0.0058
18G-XTW	0.0495 – 0.0505	0.05	0.0410 – 0.0430	0.042	0.004
18G-UTW	0.0495 – 0.0505	0.05	0.0430 – 0.0455	0.0443	0.0029
18G-XXTW	0.0495 – 0.0505	0.05	0.0450 – 0.0470	0.046	0.002
19G-HW	0.0420 – 0.0430	0.0425	0.0215 – 0.0245	0.023	0.0098
19G-RW	0.0415 – 0.0425	0.042	0.0255 – 0.0285	0.027	0.0075
19G-TW	0.0415 – 0.0425	0.042	0.0315 – 0.0335	0.0325	0.0048
19G-XTW	0.0415 – 0.0425	0.042	0.0340 – 0.0360	0.035	0.0035
19G-UTW	0.0425 – 0.0435	0.043	0.0365 – 0.0385	0.0375	0.0028
19G-XXTW	0.0415 – 0.0425	0.042	0.0360 – 0.0380	0.037	0.0025
20G-HW	0.0355 – 0.0360	0.0358	0.0180 – 0.0200	0.019	0.0084
20G-RW	0.0355 – 0.0360	0.0358	0.0230 – 0.0245	0.0238	0.006
20G-TW	0.0355 – 0.0360	0.0358	0.0255 – 0.0270	0.0263	0.0048
20G-XTW	0.0355 – 0.0360	0.0358	0.0270 – 0.0285	0.0278	0.004
20G-UTW	0.0355 – 0.0360	0.0358	0.0290 – 0.0305	0.0298	0.003
20G-XXTW	0.0355 – 0.0360	0.0358	0.0310 – 0.0325	0.0318	0.002

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
21G-HW	0.0320 – 0.0325	0.0323	0.0150 – 0.0170	0.016	0.0081
21G-RW	0.0320 – 0.0325	0.0323	0.0195 – 0.0210	0.0203	0.006
21G-TW	0.0320 – 0.0325	0.0323	0.0225 – 0.0240	0.0233	0.0045
21G-XTW	0.0320 – 0.0325	0.0323	0.0250 – 0.0270	0.026	0.0031
21G-UTW	0.0320 – 0.0325	0.0323	0.0260 – 0.0275	0.0268	0.0028
21G-XXTW	0.0320 – 0.0325	0.0323	0.0280 – 0.0295	0.0288	0.0018
22G-RW	0.0280 – 0.0285	0.0283	0.0155 – 0.0170	0.0163	0.006
22G-TW	0.0280 – 0.0285	0.0283	0.0190 – 0.0205	0.0198	0.0043
22G-XTW	0.0280 – 0.0285	0.0283	0.0205 – 0.0220	0.0213	0.0035
22G-UTW	0.0280 – 0.0285	0.0283	0.0225 – 0.0240	0.0233	0.0025
23G-RW	0.0250 – 0.0255	0.0253	0.0125 – 0.0140	0.0133	0.006
23G-TW	0.0250 – 0.0255	0.0253	0.0165 – 0.0180	0.0173	0.004
23G-XTW	0.0250 – 0.0255	0.0253	0.0185 – 0.0200	0.0193	0.003
23G-UTW	0.0250 – 0.0255	0.0253	0.0195 – 0.0210	0.0203	0.0025
23G-XXTW	0.0250 – 0.0255	0.025	0.0200 – 0.0220	0.021	0.002
24G-RW	0.0220 – 0.0225	0.0223	0.0115 – 0.0130	0.0123	0.005
24G-TW	0.0220 – 0.0225	0.0223	0.0135 – 0.0150	0.0143	0.004
24G-XTW	0.0220 – 0.0225	0.0223	0.0155 – 0.0170	0.0163	0.003
24G-UTW	0.0220 – 0.0225	0.0223	0.0165 – 0.0180	0.0173	0.0025
24G-XXTW	0.0220 – 0.0225	0.0223	0.0170 – 0.0190	0.018	0.002
25G-RW	0.0200 – 0.0205	0.0203	0.0095 – 0.0110	0.0103	0.005
25G-TW	0.0200 – 0.0205	0.0203	0.0115 – 0.0130	0.0123	0.004
25G-XTW	0.0200 – 0.0205	0.0203	0.0135 – 0.0150	0.0143	0.003
25G-UTW	0.0200 – 0.0205	0.0203	0.0155 – 0.0170	0.0163	0.002

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
26G-RW	0.0180 – 0.0185	0.0183	0.0095 – 0.0110	0.0103	0.004
26G-TW	0.0180 – 0.0185	0.0183	0.0115 – 0.0130	0.0123	0.003
26G-XTW	0.0180 – 0.0185	0.0183	0.0130 – 0.0145	0.0138	0.0023
27G-RW	0.0160 – 0.0165	0.0163	0.0075 – 0.0090	0.0083	0.004
27G-TW	0.0160 – 0.0165	0.0163	0.0095 – 0.0110	0.0103	0.003
27G-XTW	0.0160 – 0.0165	0.0163	0.0115 – 0.0125	0.012	0.0021
28G-RW	0.0140 – 0.0145	0.0143	0.0065 – 0.0080	0.0073	0.0035
28G-TW	0.0140 – 0.0145	0.0143	0.0085 – 0.0100	0.0093	0.0025
28G-XTW	0.0140 – 0.0145	0.0143	0.0100 – 0.0110	0.0105	0.0019
29G-RW	0.0130 – 0.0135	0.0133	0.0065 – 0.0080	0.0073	0.003
29G-TW	0.0130 – 0.0135	0.0133	0.0080 – 0.0090	0.0085	0.0024
29G-XTW	0.0130 – 0.0135	0.0133	0.0090 – 0.0100	0.0095	0.0019
30G-RW	0.0120 – 0.0125	0.0123	0.0055 – 0.0070	0.0063	0.003
30G-TW	0.0120 – 0.0125	0.0123	0.0065 – 0.0080	0.0073	0.0025
30G-XTW	0.0120 – 0.0125	0.0123	0.0075 – 0.0090	0.0083	0.002

Gauge	Outside Diameter	Nominal OD	Inside Diameter	Nominal ID	Nominal WT
31G-RW	0.0100 – 0.0105	0.0103	0.0040 – 0.0055	0.0048	0.0028
32G-RW	0.0090 – 0.0095	0.0093	0.0035 – 0.0050	0.0043	0.0025