DOM / seamless mechanical round steel tube (ASTM A513): common OD × wall sizes, 3/8 to 12 in OD, + 100 mm sections for the sizes distributors agree on — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/dom-mechanical-steel-round-tube-astm-a513/ (sheet CC BY 4.0) Basis: Metals Depot's 117-size DOM (A513 Type 5) table, Alcobra Metals' 1020 DOM list (1-1/4 and 1-1/2 in OD) and Online Metals' A513 list (first 24 sizes read) cross-checked; weights left out Catalog version: 2026-10-20 Overall (mm): length 38.1, width 38.1, height 100.0 - DOM (drawn over mandrel) round steel tube is sold by outside diameter and wall in inches; Metals Depot's listing is headed DOM (A513-T5) and Online Metals' list A513. The table is the union of three distributors' lists: 130 OD × wall sizes (117 from Metals Depot, 12 from Alcobra Metals, 24 from Online Metals, which overlap). The last column shows which distributors list each size (MD Metals Depot, AL Alcobra, OM Online Metals). Alcobra and Online Metals print only the first page of their lists in the text read (Alcobra 12 of 62, Online Metals 25 of 139), so a size missing from them is not evidence that it is not made. - ID is OD − 2 × wall. Metals Depot prints an ID for every row and Online Metals for its rows; every Metals Depot ID equals OD − 2 × wall to within 0.002 in (checked here; for example 1-1/2 × 0.120 prints 1.260, 2 × 0.250 prints 1.50), and the Online Metals IDs to within 0.005 in (it rounds some to 0.01 in, for example 0.28 for 3/8 × 0.049, which is 0.277). Alcobra's list has no ID. Two Online Metals rows have a conflict between their title and detail (5/8 × 0.065 ID 0.5 vs 0.495, 3/4 × 0.049 wall 0.049 vs 0.154); the first is kept at the wall (0.065, ID derived 0.495), the second is dropped. - Weights are not given: Metals Depot's weight column repeats values that cannot both be right (for example 1 in × 0.065 and 1 in × 0.083 both print 0.65 lb/ft, and 5/8 in × 0.156 and × 0.188 both print 0.90), so none of its weights is used. - Not on this page: the standard's OD and wall tolerances (ASTM A513 was not read), steel grade (Alcobra's list is 1020; the others do not state the grade here). The Metals Depot page also lists J525 hydraulic and A519 seamless tube, which are not DOM and are left out. Related tables: structural round HSS (aisc-hss-round), steel pipe by NPS (steel-pipe-asme-b36-10m-nps-1-8-to-24). - Files: 100 mm hollow sections of the 23 OD × wall sizes that at least two distributors list; the length is Xem's example length. OD as listed, in OD, in OD, mm wall, in wall, mm ID, in (OD − 2 × wall) ID, mm distributors 1/4 0.25 6.35 0.035 0.89 0.180 4.57 OM 3/8 0.375 9.53 0.035 0.89 0.305 7.75 MD 3/8 0.375 9.53 0.049 1.24 0.277 7.04 OM 3/8 0.375 9.53 0.065 1.65 0.245 6.22 MD+OM 1/2 0.5 12.70 0.035 0.89 0.430 10.92 OM 1/2 0.5 12.70 0.049 1.24 0.402 10.21 MD+OM 1/2 0.5 12.70 0.065 1.65 0.370 9.40 MD+OM 1/2 0.5 12.70 0.083 2.11 0.334 8.48 MD 1/2 0.5 12.70 0.095 2.41 0.310 7.87 OM 1/2 0.5 12.70 0.120 3.05 0.260 6.60 MD+OM 1/2 0.5 12.70 0.156 3.96 0.188 4.78 MD 9/16 0.5625 14.29 0.120 3.05 0.323 8.19 MD 5/8 0.625 15.88 0.035 0.89 0.555 14.10 OM 5/8 0.625 15.88 0.049 1.24 0.527 13.39 MD 5/8 0.625 15.88 0.058 1.47 0.509 12.93 MD+OM 5/8 0.625 15.88 0.065 1.65 0.495 12.57 MD+OM 5/8 0.625 15.88 0.083 2.11 0.459 11.66 OM 5/8 0.625 15.88 0.095 2.41 0.435 11.05 OM 5/8 0.625 15.88 0.120 3.05 0.385 9.78 MD+OM 5/8 0.625 15.88 0.156 3.96 0.313 7.95 MD+OM 5/8 0.625 15.88 0.188 4.78 0.249 6.32 MD 11/16 0.6875 17.46 0.032 0.81 0.623 15.84 OM 11/16 0.6875 17.46 0.120 3.05 0.448 11.37 OM 3/4 0.75 19.05 0.035 0.89 0.680 17.27 OM 3/4 0.75 19.05 0.049 1.24 0.652 16.56 MD 3/4 0.75 19.05 0.065 1.65 0.620 15.75 MD+OM 3/4 0.75 19.05 0.083 2.11 0.584 14.83 OM 3/4 0.75 19.05 0.095 2.41 0.560 14.22 MD+OM 3/4 0.75 19.05 0.109 2.77 0.532 13.51 MD+OM 3/4 0.75 19.05 0.120 3.05 0.510 12.95 MD+OM 3/4 0.75 19.05 0.156 3.96 0.438 11.13 MD 3/4 0.75 19.05 0.188 4.78 0.374 9.50 OM 7/8 0.875 22.23 0.058 1.47 0.759 19.28 MD 7/8 0.875 22.23 0.065 1.65 0.745 18.92 MD 7/8 0.875 22.23 0.120 3.05 0.635 16.13 MD 7/8 0.875 22.23 0.156 3.96 0.563 14.30 MD 1 1 25.40 0.058 1.47 0.884 22.45 MD 1 1 25.40 0.065 1.65 0.870 22.10 MD 1 1 25.40 0.083 2.11 0.834 21.18 MD 1 1 25.40 0.109 2.77 0.782 19.86 MD 1 1 25.40 0.120 3.05 0.760 19.30 MD 1 1 25.40 0.156 3.96 0.688 17.48 MD 1 1 25.40 0.188 4.78 0.624 15.85 MD 1 1 25.40 0.250 6.35 0.500 12.70 MD 1-1/8 1.125 28.58 0.065 1.65 0.995 25.27 MD 1-1/8 1.125 28.58 0.120 3.05 0.885 22.48 MD 1-1/8 1.125 28.58 0.156 3.96 0.813 20.65 MD 1-1/8 1.125 28.58 0.250 6.35 0.625 15.88 MD 1-1/4 1.25 31.75 0.065 1.65 1.120 28.45 AL+MD 1-1/4 1.25 31.75 0.095 2.41 1.060 26.92 AL+MD 1-1/4 1.25 31.75 0.109 2.77 1.032 26.21 MD 1-1/4 1.25 31.75 0.120 3.05 1.010 25.65 AL+MD 1-1/4 1.25 31.75 0.134 3.40 0.982 24.94 AL 1-1/4 1.25 31.75 0.188 4.78 0.874 22.20 AL+MD 1-1/4 1.25 31.75 0.250 6.35 0.750 19.05 MD 1-5/16 1.3125 33.34 0.120 3.05 1.073 27.24 MD 1-3/8 1.375 34.93 0.065 1.65 1.245 31.62 MD 1-3/8 1.375 34.93 0.095 2.41 1.185 30.10 MD 1-3/8 1.375 34.93 0.125 3.18 1.125 28.58 MD 1-3/8 1.375 34.93 0.250 6.35 0.875 22.23 MD 1-1/2 1.5 38.10 0.065 1.65 1.370 34.80 AL+MD 1-1/2 1.5 38.10 0.083 2.11 1.334 33.88 AL+MD 1-1/2 1.5 38.10 0.095 2.41 1.310 33.27 AL+MD 1-1/2 1.5 38.10 0.109 2.77 1.282 32.56 MD 1-1/2 1.5 38.10 0.120 3.05 1.260 32.00 AL+MD 1-1/2 1.5 38.10 0.188 4.78 1.124 28.55 AL+MD 1-1/2 1.5 38.10 0.250 6.35 1.000 25.40 AL+MD 1-1/2 1.5 38.10 0.375 9.53 0.750 19.05 AL+MD 1-9/16 1.5625 39.69 0.120 3.05 1.323 33.59 MD 1-5/8 1.625 41.28 0.065 1.65 1.495 37.97 MD 1-5/8 1.625 41.28 0.120 3.05 1.385 35.18 MD 1-5/8 1.625 41.28 0.134 3.40 1.357 34.47 MD 1-5/8 1.625 41.28 0.156 3.96 1.313 33.35 MD 1-3/4 1.75 44.45 0.065 1.65 1.620 41.15 MD 1-3/4 1.75 44.45 0.095 2.41 1.560 39.62 MD 1-3/4 1.75 44.45 0.109 2.77 1.532 38.91 MD 1-3/4 1.75 44.45 0.120 3.05 1.510 38.35 MD 1-3/4 1.75 44.45 0.188 4.78 1.374 34.90 MD 1-3/4 1.75 44.45 0.250 6.35 1.250 31.75 MD 1-7/8 1.875 47.63 0.120 3.05 1.635 41.53 MD 1-7/8 1.875 47.63 0.250 6.35 1.375 34.93 MD 2 2 50.80 0.065 1.65 1.870 47.50 MD 2 2 50.80 0.095 2.41 1.810 45.97 MD 2 2 50.80 0.120 3.05 1.760 44.70 MD 2 2 50.80 0.188 4.78 1.624 41.25 MD 2 2 50.80 0.250 6.35 1.500 38.10 MD 2 2 50.80 0.375 9.53 1.250 31.75 MD 2 2 50.80 0.500 12.70 1.000 25.40 MD 2-1/4 2.25 57.15 0.120 3.05 2.010 51.05 MD 2-1/4 2.25 57.15 0.250 6.35 1.750 44.45 MD 2-1/4 2.25 57.15 0.500 12.70 1.250 31.75 MD 2-3/8 2.375 60.33 0.188 4.78 1.999 50.77 MD 2-1/2 2.5 63.50 0.120 3.05 2.260 57.40 MD 2-1/2 2.5 63.50 0.250 6.35 2.000 50.80 MD 2-1/2 2.5 63.50 0.375 9.53 1.750 44.45 MD 2-1/2 2.5 63.50 0.500 12.70 1.500 38.10 MD 2-5/8 2.625 66.68 0.120 3.05 2.385 60.58 MD 2-3/4 2.75 69.85 0.120 3.05 2.510 63.75 MD 2-3/4 2.75 69.85 0.375 9.53 2.000 50.80 MD 3 3 76.20 0.065 1.65 2.870 72.90 MD 3 3 76.20 0.120 3.05 2.760 70.10 MD 3 3 76.20 0.188 4.78 2.624 66.65 MD 3 3 76.20 0.250 6.35 2.500 63.50 MD 3 3 76.20 0.375 9.53 2.250 57.15 MD 3 3 76.20 0.500 12.70 2.000 50.80 MD 3-1/2 3.5 88.90 0.120 3.05 3.260 82.80 MD 3-1/2 3.5 88.90 0.188 4.78 3.124 79.35 MD 3-1/2 3.5 88.90 0.250 6.35 3.000 76.20 MD 4 4 101.60 0.065 1.65 3.870 98.30 MD 4 4 101.60 0.125 3.18 3.750 95.25 MD 4 4 101.60 0.188 4.78 3.624 92.05 MD 4 4 101.60 0.250 6.35 3.500 88.90 MD 4 4 101.60 0.375 9.53 3.250 82.55 MD 4 4 101.60 0.500 12.70 3.000 76.20 MD 5 5 127.00 0.125 3.18 4.750 120.65 MD 5 5 127.00 0.188 4.78 4.624 117.45 MD 5 5 127.00 0.250 6.35 4.500 114.30 MD 6 6 152.40 0.125 3.18 5.750 146.05 MD 6 6 152.40 0.250 6.35 5.500 139.70 MD 6 6 152.40 0.375 9.53 5.250 133.35 MD 6 6 152.40 0.500 12.70 5.000 127.00 MD 8 8 203.20 0.250 6.35 7.500 190.50 MD 8 8 203.20 0.375 9.53 7.250 184.15 MD 8 8 203.20 0.500 12.70 7.000 177.80 MD 10 10 254.00 0.250 6.35 9.500 241.30 MD 10 10 254.00 0.375 9.53 9.250 234.95 MD 10 10 254.00 0.500 12.70 9.000 228.60 MD 12 12 304.80 0.250 6.35 11.500 292.10 MD 12 12 304.80 0.375 9.53 11.250 285.75 MD 12 12 304.80 0.500 12.70 11.000 279.40 MD Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Metals Depot: Steel round tube DOM (A513 Type 5): 117 sizes, OD, wall, ID (3/8 to 12 in OD) — web — Distributor listing; numbers only. Its weight column is not used — https://www.metalsdepot.com/steel-products/steel-round-tube-dom - Alcobra Metals: 1020 DOM carbon steel tubing ASTM A513: OD x wall (first page of 62, 1-1/4 and 1-1/2 in OD) — web — Distributor listing; numbers only — https://alcobrametals.com/product-category/carbon-steel/round-tube_134/1020-dom-carbon-steel-tubing-astm-a-513/ - Online Metals: Carbon steel round tube A513: OD, wall, ID (first page of 139 results) — web — Distributor listing; numbers only — https://www.onlinemetals.com/en/buy/carbon-steel-round-tube-a513 Free files (CC BY 4.0, Xem Studio; STEP + STL, 23 parts): https://xemstudio.com/files/hardware/dom-mechanical-steel-round-tube-astm-a513/index.json API: https://xemstudio.com/api/geometry?object=dom-mechanical-steel-round-tube-astm-a513