Luer connectors (ISO 594 / ISO 80369-7): 6% taper dimensions, male and female Luer slip and Luer lock, + true-size taper gauges — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/luer-connectors-iso-594-80369-7/ (sheet CC BY 4.0) Basis: ISO 594-1:1986 Table 1 (copy), the iTeh sample pages and Thread Check's table for ISO 594-2 lock fittings, and a gauge maker's summary of ISO 80369-7:2016 vs 2021; three taper gauges as files Catalog version: 2026-10-20 Overall (mm): length 16.0, width 16.0, height 9.5 - A Luer taper is a 6 % conical fitting: the diameter grows by 0.06 mm for every mm of length (0.06:1; a 6 % taper, not a six-degree cone). ISO 594-1:1986 gives, for a male fitting, the reference diameter d min 3.925 mm at the end (d max 3.990 mm rigid, 4.027 mm semi-rigid) and a length E of at least 7.5 mm; for a female fitting, the opening diameter D 4.270 to 4.315 mm and a depth F of at least 7.5 mm. ISO 594-1 has been replaced for new designs by ISO 80369-7 (small-bore connectors for intravascular or hypodermic use) which restates the male and female limits at other measuring planes; the limits are in the table as a gauge maker lists them. The copy of ISO 594-1 read is garbled in the tolerance row of the table (the letter M for the female engagement tolerance is inferred from a footnote), so the engagement tolerance rows M and N are left out. - The 80369-7 limits are not directly comparable with the 594-1 ones, because they sit at other measuring planes: its male d is 3.970 – 4.072 mm (semi-rigid) and its female D 4.198 – 4.298 mm. The 80369-7 table is a third-party summary, not the standard; check the standard before using it for a compliance decision. The summary does not state the planes themselves. - Luer lock (ISO 594-2): the same cone, plus a double-start right-hand thread with 2.5 mm pitch (5 mm lead) on the female (lugs or external thread) and a collar on the male. The lock dimensions in the table are the ones that agree between the iTeh sample pages (OCR) and Thread Check's table. The male thread root and crest diameters (H, J) and the outside diameter across lugs (2X) differ between the two copies (for example 2X 7.83 in one and 7.33 in the other) or are unreadable, so they are not shown. The lock thread and lug are not drawn: no profile is published as numbers in a source read. - Files are three gauges, not syringes: (1) a male cone, Ø3.925 at the tip end growing at 6 % over 7.5 mm to Ø4.375, on a Ø10 handle; (2) a female socket with the opening at Ø4.270 (D min) closing at 6 % over 7.5 mm to Ø3.820; (3) the same socket at the opening Ø4.315 (D max, bottom Ø3.865). The cone numbers are ISO 594-1's; handle, hub, flange and the straight relief bore behind the cone are Xem's choices. A real Luer part also has a bore, a collar or a hub that this page does not define; for a syringe with its Luer tip see plastic-syringes and glass-syringes. - Barb adapters, tube sizes: luer-to-barb-adapters. Silicone, PU and push-fit tube: silicone-tube-and-fittings. Maker CAD: Qosina publishes models of its Luer parts for registered users; linked, not copied. standard symbol what it is value unit ISO 594-1:1986 (6 % taper) d min min diameter at the end of the male fitting (reference diameter) 3.925 (rigid and semi-rigid) mm ISO 594-1:1986 d max max diameter at the end of the male fitting 3.990 rigid; 4.027 semi-rigid mm ISO 594-1:1986 D min / max diameter at the opening of the female fitting 4.270 / 4.315 mm ISO 594-1:1986 E min length of the male fitting 7.500 mm ISO 594-1:1986 F min depth of the female fitting 7.500 mm ISO 594-1:1986 L min length of engagement (derived from the basic dimensions per the standard's footnote) 4.665 rigid; 4.050 semi-rigid mm ISO 594-1:1986 R max radius of curvature at the end (or an equivalent entry chamfer, no sharp corners) 0.5 mm ISO 594-1:1986 taper gauges drawn at 0.06:1 6 % (0.06 mm of diameter per mm of length; not a 6-degree cone) — ISO 80369-7 (2016 and 2021) male d, semi-rigid limits as listed by a gauge maker 3.970 – 4.072 mm ISO 80369-7 (2021) male d, rigid limits (new in the 2021 edition) 3.970 – 4.035 mm ISO 80369-7 (2021) male g, semi-rigid / rigid limits (2016 semi-rigid: 4.376 – 4.476) 4.375 – 4.477 / 4.375 – 4.440 mm ISO 80369-7 (2021) female D, semi-rigid limits (recommended 4.225 – 4.298; 2016: 4.198 – 4.298) 4.198 – 4.298 mm ISO 80369-7 (2021) female D, rigid limits (same as the ISO 594 range) 4.225 – 4.270 mm ISO 80369-7 (2021) female G, semi-rigid / rigid limits (recommended semi-rigid 3.820 – 3.893; 2016: 3.793 – 3.893) 3.793 – 3.893 / 3.820 – 3.865 mm ISO 80369-7 reference connectors (2021) male cone SE diameter, angle reference connector cone, at 0.75 mm 4.021 +0.001/−0.004; 3.437° mm ISO 80369-7 reference connectors (2021) female cone LE diameter, angle reference connector cone, at 0.75 mm 4.247 +0.001/−0.004; 3.436° mm ISO 594-2 (lock) thread female lock thread: double-start, right-hand, nominal pitch 2.5 mm lead 5 mm ISO 594-2 (lock) E min length of male lock fitting 7.5 mm ISO 594-2 (lock) G max female outside diameter at the lug base / internal thread diameter 6.73 mm ISO 594-2 (lock) K max male thread width at root 1.0 mm ISO 594-2 (lock) P min projection of the nozzle from the collar 2.1 mm ISO 594-2 (lock) Q min male thread crest width 0.3 mm ISO 594-2 (lock) S min female lug / thread crest width 0.3 mm ISO 594-2 (lock) T max male tip to bottom of the first complete internal thread form (the 80369-7 reference connector also shows 3.2) 3.2 mm ISO 594-2 (lock) V max female lug chord at the base, on a circle of Ø7.0 min 3.5 mm ISO 594-2 (lock) W min female lug chord at the extremity 2.71 mm ISO 594-2 (lock) Y max lug / thread base width, at G max 1.2 mm ISO 594-2 (lock) α thread / lug bearing surface angle to the plane at right angles to the axis 25° +5′/0 (one copy: +5°/−0) — ISO 594-2 (lock) H, J, 2X male thread root diameter, crest diameter, outside diameter across lugs sources disagree or unreadable: not shown — Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - ISO 594-1:1986 (copy hosted by mdcpp.com): ISO 594-1: Conical fittings with a 6% (Luer) taper for syringes, needles and certain other medical equipment, Part 1: General requirements; Table 1 dimensions d, D, E, F, L, R — web — Copy of the standard; numbers only — https://mdcpp.com/doc/standard/ISO594-1-1986(E).pdf - iTeh Standards (ISO 594-2:1991 sample pages): ISO 594-2: Lock fittings, Part 2: dimensions of rigid conical lock fittings (table 1 symbols), sample pages (OCR text, partly garbled) — web — Sample pages; numbers only — https://cdn.standards.iteh.ai/samples/4694/bf4ef10b987d42e18fa32a6099c9e15d/ISO-594-2-1991.pdf - Thread Check: ISO 594-2 technical info: lock-fitting dimension table (text is partly garbled) — web — Gauge maker's page; numbers only — https://www.threadcheck.com/iso-594-2/technicalinfo/ - Ring & Plug Thread Gages: ISO 80369-7 changes 2016 to 2021: male d, g and female D, G limits (rigid and semi-rigid), reference connector dimensions (third-party summary) — web — Gauge maker's summary; numbers only, check the standard — https://ring-plug-thread-gages.com/ti-spec-ISO-80369-7-Changes-2016-to-2021.html - Wikipedia: Luer taper — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Luer_taper - Qosina: Luer connectors and fittings (maker's own CAD models after free log-in) — web — Maker's page; CAD behind a free log-in, not copied — https://www.qosina.com/pc-luer-lock-to-barb-connector-sample-kit-q3000-pc Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/luer-connectors-iso-594-80369-7/index.json API: https://xemstudio.com/api/geometry?object=luer-connectors-iso-594-80369-7