Luer lock and Luer slip to barb adapters: tubing ID sizes 1/16 to 1/4 in (Nordson Value Plastics, Qosina), male and female — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/luer-to-barb-adapters/ (sheet CC BY 4.0) Basis: Nordson Value Plastics' male Luer-to-barb catalog page (distributor copy), Qosina's Luer-lock-to-barb sample kit page, Darwin Microfluidics' listing as a cross-check; tube ID per part, numbers only Catalog version: 2026-10-20 Sizes: see table below - The sources print the tubing inside diameter each barb is made for, and nothing else about the barb: no barb outside diameter, no length. So this page is a tube-size table, not a barb drawing. Nordson Value Plastics sorts its barbs into series (200, 300, 400, 500, as printed; the numbers are series names, not dimensions) and lists male Luer lock (integral lock ring), male Luer slip, and fittings made to fit a separate rotating or stationary lock ring. Qosina's polycarbonate kit lists a female and a male Luer lock barbed connector for each of six tube IDs. Darwin Microfluidics' male Luer lock to barb adapters (1/16, 3/32, 1/8 in ID, polypropylene or nylon) agree with the matching Nordson sizes. - Tube size means the inside diameter of the soft tube that is stretched over the barb: 1/16 in (1.6 mm), 3/32 (2.4 mm), 1/8 (3.2 mm), 5/32 (4.0 mm), 3/16 (4.8 mm), 1/4 (6.4 mm). Nordson prints one oddity, .170 in (4.3 mm), for a 400-series part. Qosina prints the exact inch value too (for example 3/16 in = 0.188 in = 4.76 mm). mm values in the last column are the sources' own where printed and the inch value × 25.4 otherwise. - The Luer end is the 6 % cone of luer-connectors-iso-594-80369-7. A 4 × 6 mm silicone or airline tube (4 mm ID) is closest to the 5/32 in (4.0 mm) barb; 3/16 in ID airline tubing matches the 3/16 in (4.8 mm) barb: see aquarium-airline-tubing. Which barb is right for your tube is a matter of the maker's data; this page does not rate fits. - No file: barb OD, length and barb profile are not published as numbers in any source read. Qosina publishes CAD for its Luer parts for registered users and Nordson Medical publishes models on its site; linked, not copied. maker type part number(s) barb series tube ID (in) tube ID (mm) Nordson Value Plastics Male Luer integral lock ring MTLL210 / MTLL410 / MTLL004 200 / 400 / 500 1/16 in 1.59 mm Nordson Value Plastics Male Luer integral lock ring MTLL420 / MTLL007 / MTLL220 400 / 500 / 200 3/32 in 2.38 mm Nordson Value Plastics Male Luer integral lock ring MTLL230 / MTLL013 / MTLL430 200 / 500 / 400 1/8 in 3.17 mm Nordson Value Plastics Male Luer integral lock ring MTLL240 / MTLL025 200 / 500 5/32 in 3.97 mm Nordson Value Plastics Male Luer integral lock ring MTLL250 / MTLL450 / MTLL035 200 / 400 / 500 3/16 in 4.76 mm Nordson Value Plastics Male Luer integral lock ring MTLL445 400 .170 in 4.3 (as printed) mm Nordson Value Plastics Male Luer integral lock ring MTLL360 / MTLL055 300 / 500 1/4 in 6.35 mm Nordson Value Plastics Male Luer slip MTLS210 / MSL004 200 / 500 1/16 in 1.59 mm Nordson Value Plastics Male Luer slip MTLS220 / MSL007 200 / 500 3/32 in 2.38 mm Nordson Value Plastics Male Luer slip MTLS230 / MSL013 200 / 500 1/8 in 3.17 mm Nordson Value Plastics Male Luer slip MTLS240 / MSL025 200 / 500 5/32 in 3.97 mm Nordson Value Plastics Male Luer slip MSL035 500 3/16 in 4.76 mm Nordson Value Plastics Male Luer slip MSL055 500 1/4 in 6.35 mm Nordson Value Plastics Male Luer, rotating lock ring compatible MLRL004 / 007 / 013 / 025 / 035 / 055 500 1/16, 3/32, 1/8, 5/32, 3/16, 1/4 in 1.59, 2.38, 3.17, 3.97, 4.76, 6.35 mm Nordson Value Plastics Male Luer, stationary lock ring compatible MLSL004 / 007 / 013 / 025 / 035 / 055 500 1/16, 3/32, 1/8, 5/32, 3/16, 1/4 in 1.59, 2.38, 3.17, 3.97, 4.76, 6.35 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11544 / 11545 — 1/16 in (0.063 in) 1.59 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11546 / 11547 — 3/32 in (0.094 in) 2.38 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11548 / 11549 — 1/8 in (0.125 in) 3.18 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11550 / 11551 — 5/32 in (0.156 in) 3.97 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11552 / 11553 — 3/16 in (0.188 in) 4.76 mm Qosina (sample kit Q3000-PC) Female / male Luer lock, barbed (PC) 11554 / 11555 — 1/4 in (0.25 in) 6.35 mm Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Nordson Value Plastics (distributor copy of catalog page vp022): Male Luer to barb fittings: part numbers, barb series, tube ID (integral lock ring, slip, rotating / stationary lock ring compatible) — web — Maker catalog page; numbers only — https://pdf2.chromtech.net.au/vp022_Luers-Male_6-11.pdf - Qosina: Polycarbonate Luer locks to barb connectors sample kit Q3000-PC: male and female Luer lock, barbed, parts 11544-11555 and the tubing ID each fits — web — Maker page; numbers only. CAD behind a free log-in, not copied — https://www.qosina.com/pc-luer-lock-to-barb-connector-sample-kit-q3000-pc - Darwin Microfluidics: Male luer lock to barb adapters pack of 10: tubing ID 1/16, 3/32, 1/8 in (cross-check) — web — Distributor page; numbers only — https://darwin-microfluidics.com/products/male-luer-lock-to-barb-adapters-pack-of-10 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=luer-to-barb-adapters