Printable tri-clamp (45°): NPT male, NPT female and hose-barb adapters — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/printable-tri-clamp-adapters/ (CC BY 4.0) Basis: Xem Studio design: lengths A per the standard 21MP / 22MP / 14MPHR tables used on the standard adapter pages, 45° rims; threads not modelled (male: major Ø over L2; female: tap-drill bore) Catalog version: 2026-10-20 Sizes: see table below - Print face down; the thread or barb end prints up. - Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6. - Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside. - Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40. clamp end A_in ½ ¼ MNPT 2.0 ½ ½ MNPT 1.63 ¾ ¾ MNPT 1.79 1 ½ MNPT 2.19 1 1 MNPT 2.25 2 2 MNPT 2.64 2½ 2½ MNPT 2.88 3 3 MNPT 3.07 4 4 MNPT 3.16 ½ ⅛ FNPT 1.25 ½ ¼ FNPT 1.5 ¾ ¼ FNPT 1.5 1½ 1½ FNPT 2.25 2 2 FNPT 2.34 3 3 FNPT 2.19 4 4 FNPT 2.63 ½–¾ 0.25 in barb 1.5 ½–¾ 0.375 in barb 1.5 ½–¾ 0.5 in barb 1.5 1–1½ 0.25 in barb 1.5 1–1½ 0.375 in barb 1.5 1–1½ 0.5 in barb 1.5 1–1½ 0.75 in barb 1.5 1–1½ 1 in barb 1.687 2 0.5 in barb 1.812 2 1.5 in barb 2.312 3 3 in barb 3.094 4 4 in barb 3.406 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Dixon: Clamp × male NPT (T21MP) and clamp × female NPT (T22MP) adapters: A per size — PDF — publisher's catalogue; dimensions cited — https://api.dixonvalve.com/en/media/1490003 - Steel & O'Brien: 14MPHR rubber hose adapter: A per clamp × barb size — web — publisher's table; dimensions cited — https://www.steelobrien.com/products/sanitary-fittings/clamp-fittings/adapters/14mphr-rubber-hose-adapter/ - Dixon: 14MPHR brewery hose barb: A and barb OD B (hose ID + 0.040 in) per size, ½ to 6 in — PDF — publisher's catalogue; dimensions cited — https://www.cooneybrothers.com/userfiles/ad/documents/Dixon_Sanitary_14MPHRG600_Catalog.pdf - ASME: B1.20.1 Pipe threads, general purpose (NPT): major diameter, L2, tap drill; B16.11 forged fittings (Class 3000 couplings); B36.10 Sch 40 bore — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/b1-20-1-pipe-threads-general-purpose-inch - Rubber Fab: Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf Free files (CC BY 4.0, Xem Studio; STEP + STL, 28 parts): https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/index.json API: https://xemstudio.com/api/geometry?object=printable-tri-clamp-adapters