Dowel pins, inch (ASME B18.8.2 hardened ground machine dowel pins), 1/16 to 1 in: standard and oversize diameter limits, point diameter, crown — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/dowel-pins-asme-b18-8-2-inch/ (sheet CC BY 4.0) Basis: Engineers Edge's ASME B18.8.2 table, checked against the Machinery's Handbook pocket companion table (1/16 to 1/2 in agree on every value read; its 5/8 in row is cut off); numbers only Catalog version: 2026-10-20 Sizes: see table below - Hardened ground machine dowel pins, ASME B18.8.2, inch, nominal 1/16 to 1 in. Each size has two diameter series: the standard series (for initial installation) and the oversize series (0.0008 in larger, for replacement pins in worn holes), each with a 0.0002 in limit band. Columns: pin diameter max / min for each series in inches (as printed) and in mm (computed, x 25.4), point diameter B max / min and the crown value C max / min, all in inches. Engineers Edge's heading for the last pair is 'crown height C / crown radius R' without saying which the printed column is, so the column is labelled C (crown) and not read further; the Machinery's Handbook text prints the same numbers. The 5/32 in nominal is missing in Engineers Edge's size column and was read from the diameters (0.1565 / 0.1563 in) in both sources. - Length tolerance is ±0.010 in (Engineers Edge's footnote; Amesweb's ASME B18.8.2-2000 page prints the same). Nominal lengths run in 1/16 in steps up to 3/8 in, then 1/8 in, 1/4 in and 1/2 in steps per Engineers Edge's footnote b; the per-size length table was not on the page. The Machinery's Handbook text also prints a double-shear column and a suggested hole range; the column labels did not survive the text extraction, so those values are left out. - Oversize series diameters are exactly 0.0008 in above the standard series (max and min) on every row read. For a nominal 1/4 in pin that is Ø6.358 / 6.353 mm standard against Ø6.378 / 6.373 mm oversize (computed). - Not on this page: unhardened dowel pins, pull-out (tapped) dowels and the metric ISO series (dowel-pins-iso-2338-8734). No file: a dowel is a cylinder with a chamfer or crown, a plain primitive, and the crown height and radius are not separated in the source read. - The existing page dowel-pins-metric covers 2 to 6 mm metric dowels at press and slip hole sizes. nominal size standard series max / min (in) standard series max / min (mm, computed) oversize series max / min (in) oversize series max / min (mm, computed) point diameter B max / min (in) crown C max / min (in) 1/16 in 0.0628 / 0.0626 1.595 / 1.590 0.0636 / 0.0634 1.615 / 1.610 0.058 / 0.048 0.020 / 0.008 5/64 in 0.0784 / 0.0782 1.991 / 1.986 0.0792 / 0.0790 2.012 / 2.007 0.074 / 0.064 0.026 / 0.010 3/32 in 0.0941 / 0.0939 2.390 / 2.385 0.0949 / 0.0947 2.410 / 2.405 0.089 / 0.079 0.031 / 0.012 1/8 in 0.1253 / 0.1251 3.183 / 3.178 0.1261 / 0.1259 3.203 / 3.198 0.120 / 0.110 0.041 / 0.016 5/32 in 0.1565 / 0.1563 3.975 / 3.970 0.1573 / 0.1571 3.995 / 3.990 0.150 / 0.140 0.052 / 0.020 3/16 in 0.1878 / 0.1876 4.770 / 4.765 0.1886 / 0.1884 4.790 / 4.785 0.180 / 0.170 0.062 / 0.023 1/4 in 0.2503 / 0.2501 6.358 / 6.353 0.2511 / 0.2509 6.378 / 6.373 0.240 / 0.230 0.083 / 0.031 5/16 in 0.3128 / 0.3126 7.945 / 7.940 0.3136 / 0.3134 7.965 / 7.960 0.302 / 0.290 0.104 / 0.039 3/8 in 0.3753 / 0.3751 9.533 / 9.528 0.3761 / 0.3759 9.553 / 9.548 0.365 / 0.350 0.125 / 0.047 7/16 in 0.4378 / 0.4376 11.120 / 11.115 0.4386 / 0.4384 11.140 / 11.135 0.424 / 0.409 0.146 / 0.055 1/2 in 0.5003 / 0.5001 12.708 / 12.703 0.5011 / 0.5009 12.728 / 12.723 0.486 / 0.471 0.167 / 0.063 5/8 in 0.6253 / 0.6251 15.883 / 15.878 0.6261 / 0.6259 15.903 / 15.898 0.611 / 0.595 0.208 / 0.078 3/4 in 0.7503 / 0.7501 19.058 / 19.053 0.7511 / 0.7509 19.078 / 19.073 0.735 / 0.715 0.250 / 0.094 7/8 in 0.8753 / 0.8751 22.233 / 22.228 0.8761 / 0.8759 22.253 / 22.248 0.860 / 0.840 0.293 / 0.109 1 in 1.0003 / 1.0001 25.408 / 25.403 1.0011 / 1.0009 25.428 / 25.423 0.980 / 0.960 0.333 / 0.125 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Engineers Edge: ANSI / ASME B18.8.2 hardened ground machine dowel pins: standard and oversize series diameter max / min, point diameter B, crown, length footnote, 1/16 to 1 in — web — Reference page; numbers only — https://engineersedge.com/hardware/machine_dowel_pins_chart_ansi_asme__13076.htm - Machinery's Handbook pocket companion (GlobalSpec reference): Dowel pins: nominal size, standard and oversize limits, point B, crown, 1/16 to 5/8 in (cross-check; OCR) — web — Reference text; numbers only — https://www.globalspec.com/reference/68241/203279/dowel-pins - Amesweb: Dowel pins dimensions (inch): ASME B18.8.2-2000 calculator; length tolerance ±0.01 in (values are interactive and were not readable) — web — Reference page; numbers only — https://Amesweb.info/Fasteners/Pins/Dowel_Pins_Dimensions_Inch.aspx - MISUMI: Dowel pins, spring pins, stepped pins (configure a part and download 3D CAD from MISUMI) — web, CAD — Maker site terms; CAD per part from the maker [verify license at link] — https://us.misumi-ec.com/vona2/A0000000001/M1800000000/M1807000000 No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=dowel-pins-asme-b18-8-2-inch