Taper pins: ISO 2339 / DIN 1 (1:50) and ANSI / ASME No. 7/0 to No. 14 (1/4 in per foot): diameters, taper, lengths + example taper pin models — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/taper-pins-iso-2339-ansi-b18-8-2/ (sheet CC BY 4.0) Basis: fasten.it's ISO 2339 table and iTeh's ISO 2339:1986 sample pages (taper, length list), Lawson Products' listings for the 1:50 and 1/4 in per foot tapers, McMaster-Carr's taper-pin tables for the inch No. 7/0 to 14 (which McMaster files under ASME B18.8.2) and a metric cross-check; 24 example pins as files Catalog version: 2026-10-20 Overall (mm): length 17.9, width 17.9, height 50.8 - ISO 2339 (DIN 1) taper pins, unhardened, 0.6 to 50 mm: the nominal d is the small end diameter (d max = nominal, d min per the table; the h10 class column is in iTeh's sample page) and the taper is 1:50, i.e. 1 mm on diameter for every 50 mm of length (Lawson's M3 x 50 mm listing: 4 mm large end; McMaster's metric table: 4 mm small end, 20 to 60 mm long, 4.4 to 5.2 mm large end). a approx. is the table's value (the sources read do not define it). Type A pins are ground (Ra 0.8 µm), type B turned (Ra 3.2 µm), designation example 'Taper pin ISO 2339 - A - 6 x 30 - St' (iTeh OCR). Nominal lengths are the same list as the parallel pins: 2 to 100 in steps (2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 35, 40, 45, 50, 55 ... 100), then 120 to 200 (iTeh). The large end of any ISO pin is d + l / 50, computed on the models; it is not a table column. - Inch rows: pin No. 7/0 to No. 14 with the large end diameter and length range McMaster prints, and the small end range it prints for those lengths; the pin number is the standard's size designation (the large end for No. 5, for example, is 0.289 in, for No. 9 it is 0.591 in, Lawson's ANSI B18.8.2 listing agrees on No. 9: taper 1/4 in per foot, large end 0.591 in). McMaster describes inch pins as 1:48 (about 1/4 in per foot). Small end = large end − length / 48 reproduces McMaster's small-end ranges at both ends of the length range for No. 7/0 (0.063 − 0.75 / 48 = 0.0474; printed 0.047) and No. 5 (0.289 − 1.5 / 48 = 0.2578; printed 0.258). The B18.8.2 standard itself was not read; the dimensions are McMaster's tables, labelled as such. - McMaster also lists tapped and threaded taper pins (internal thread for pulling, or an external thread for a nut), the threaded types at metric sizes 5 to 30 mm small end and inch No. 1 to 14; those are not tabulated here. - Hole: a taper pin goes in a hole reamed to the same taper (1:50 or 1/4 in per foot); the taper reamer's own geometry is not in the sources read. Pin ends: the metric table prints a approx., but the sources read do not say what it measures; no end form is modelled. - Files: true-size cones, small end at z = 0. Metric: small end Ø3, 4, 5, 6, 8, 10, 12 mm at the example lengths 30, 30, 40, 40, 50, 60, 60 mm (all inside McMaster's listed ranges). Inch: No. 7/0 to 2/0 at 0.75 in and No. 0 to 10 at 2 in (all inside McMaster's listed length ranges). Lengths are Xem's choices. No chamfer or crown on the ends. McMaster-Carr sells taper pins with per-part STEP; its category is linked, not copied. system size ISO: d min (mm) | inch: large end ISO: a approx. (mm) | inch: length range inch: small end range (McMaster) ISO 2339 metric (1:50) 0.6 (small end, nominal = max) 0.56 0.08 — ISO 2339 metric (1:50) 0.8 (small end, nominal = max) 0.76 0.1 — ISO 2339 metric (1:50) 1 (small end, nominal = max) 0.96 0.12 — ISO 2339 metric (1:50) 1.2 (small end, nominal = max) 1.16 0.16 — ISO 2339 metric (1:50) 1.5 (small end, nominal = max) 1.46 0.2 — ISO 2339 metric (1:50) 2 (small end, nominal = max) 1.96 0.25 — ISO 2339 metric (1:50) 2.5 (small end, nominal = max) 2.46 0.3 — ISO 2339 metric (1:50) 3 (small end, nominal = max) 2.96 0.4 — ISO 2339 metric (1:50) 4 (small end, nominal = max) 3.952 0.5 — ISO 2339 metric (1:50) 5 (small end, nominal = max) 4.952 0.63 — ISO 2339 metric (1:50) 6 (small end, nominal = max) 5.952 0.8 — ISO 2339 metric (1:50) 8 (small end, nominal = max) 7.942 1 — ISO 2339 metric (1:50) 10 (small end, nominal = max) 9.942 1.2 — ISO 2339 metric (1:50) 12 (small end, nominal = max) 11.93 1.6 — ISO 2339 metric (1:50) 16 (small end, nominal = max) 15.93 2 — ISO 2339 metric (1:50) 20 (small end, nominal = max) 19.916 2.5 — ISO 2339 metric (1:50) 25 (small end, nominal = max) 24.916 3 — ISO 2339 metric (1:50) 30 (small end, nominal = max) 29.916 4 — ISO 2339 metric (1:50) 40 (small end, nominal = max) 39.9 5 — ISO 2339 metric (1:50) 50 (small end, nominal = max) 49.9 6.3 — ANSI / ASME inch (1/4 in per ft) No. 7/0 0.063 in (1.60 mm, computed) large end length 1/2" to 3/4" small end 0.047" to 0.052" ANSI / ASME inch (1/4 in per ft) No. 6/0 0.078 in (1.98 mm, computed) large end length 1/2" to 1" small end 0.057" to 0.068" ANSI / ASME inch (1/4 in per ft) No. 5/0 0.094 in (2.39 mm, computed) large end length 1/2" to 1 1/2" small end 0.063" to 0.084" ANSI / ASME inch (1/4 in per ft) No. 4/0 0.109 in (2.77 mm, computed) large end length 1/2" to 1 1/2" small end 0.078" to 0.099" ANSI / ASME inch (1/4 in per ft) No. 3/0 0.125 in (3.17 mm, computed) large end length 1/2" to 1 1/2" small end 0.094" to 0.115" ANSI / ASME inch (1/4 in per ft) No. 2/0 0.141 in (3.58 mm, computed) large end length 3/4" to 2 1/2" small end 0.089" to 0.125" ANSI / ASME inch (1/4 in per ft) No. 0 0.156 in (3.96 mm, computed) large end length 3/4" to 3" small end 0.094" to 0.14" ANSI / ASME inch (1/4 in per ft) No. 1 0.172 in (4.37 mm, computed) large end length 3/4" to 4" small end 0.089" to 0.156" ANSI / ASME inch (1/4 in per ft) No. 2 0.193 in (4.90 mm, computed) large end length 3/4" to 4" small end 0.11" to 0.177" ANSI / ASME inch (1/4 in per ft) No. 3 0.219 in (5.56 mm, computed) large end length 3/4" to 4" small end 0.136" to 0.203" ANSI / ASME inch (1/4 in per ft) No. 4 0.250 in (6.35 mm, computed) large end length 3/4" to 4 1/2" small end 0.156" to 0.234" ANSI / ASME inch (1/4 in per ft) No. 5 0.289 in (7.34 mm, computed) large end length 1 1/2" to 7" small end 0.143" to 0.258" ANSI / ASME inch (1/4 in per ft) No. 6 0.341 in (8.66 mm, computed) large end length 1 1/2" to 6" small end 0.216" to 0.31" ANSI / ASME inch (1/4 in per ft) No. 7 0.409 in (10.39 mm, computed) large end length 1 3/4" to 6" small end 0.284" to 0.373" ANSI / ASME inch (1/4 in per ft) No. 8 0.492 in (12.50 mm, computed) large end length 1 1/2" to 7" small end 0.346" to 0.461" ANSI / ASME inch (1/4 in per ft) No. 9 0.591 in (15.01 mm, computed) large end length 2" to 7" small end 0.445" to 0.549" ANSI / ASME inch (1/4 in per ft) No. 10 0.706 in (17.93 mm, computed) large end length 2" to 8" small end 0.539" to 0.664" ANSI / ASME inch (1/4 in per ft) No. 11 0.860 in (21.84 mm, computed) large end length 5" to 12" small end 0.61" to 0.756" ANSI / ASME inch (1/4 in per ft) No. 12 1.032 in (26.21 mm, computed) large end length 5" to 12" small end 0.782" to 0.928" ANSI / ASME inch (1/4 in per ft) No. 13 1.241 in (31.52 mm, computed) large end length 12" small end 0.991" ANSI / ASME inch (1/4 in per ft) No. 14 1.523 in (38.68 mm, computed) large end length 12" small end 1.273" Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - fasten.it: ISO 2339 taper pins, unhardened, d 0.6 to 50: d max = nominal, d min, a approx. (11/1986) — web — Reference page; numbers only — https://fasten.it/norms/norm/iso_2339 - iTeh Standards: ISO 2339:1986 sample pages: Table 1 (d, a approx., h10 column), nominal lengths with min / max (2 to 200), type A ground Ra 0.8 µm / type B turned Ra 3.2 µm, designation (OCR) — web — Standards-body sample pages; numbers only — https://cdn.standards.iteh.ai/samples/7174/6d3e6dec32224d188b9d378f45e19cf7/ISO-2339-1986.pdf - Lawson Products: DIN 1 / ISO 2339 taper pin M3 x 50 mm: 1 mm taper for every 50 mm length, 4 mm large end diameter (listing) — web — Distributor listing; numbers only — https://www.lawsonproducts.com/products/din-1-iso-2339-taper-pin-m3-x-50mm-56279 - Lawson Products: ANSI B18.8.2 taper pin No. 9 x 7 in: 1/4 in taper per foot, large end 0.591 in (19/32 in) (listing) — web — Distributor listing; numbers only — https://www.lawsonproducts.com/en-ca/products/ansi-b18-8-2-taper-pin-steel-9-x-7-55012 - ISO: ISO 2339:1986: Taper pins, unhardened (standard body catalogue page; the standard itself is paid) — web — Standard body catalogue page — https://www.iso.org/standard/7174.html - McMaster-Carr: Steel taper drive pins (inch No. 7/0 to 14 and metric) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/steel-taper-drive-pins Free files (CC BY 4.0, Xem Studio; STEP + STL, 24 parts): https://xemstudio.com/files/hardware/taper-pins-iso-2339-ansi-b18-8-2/index.json API: https://xemstudio.com/api/geometry?object=taper-pins-iso-2339-ansi-b18-8-2