PTFE, FEP, PFA and ETFE fluoropolymer tubing: fractional sizes by ID, wall (standard, thin, lightweight) and industrial-spec ID × OD, 1/16 to 1/2 in — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/ptfe-fep-pfa-tubing-fractional-sizes/ (sheet CC BY 4.0) Basis: Zeus Industrial Products' extruded tubing datasheet (fractional sizes, one maker); numbers only Catalog version: 2026-10-20 Sizes: see table below - Zeus' datasheet gives the fluoropolymer tubing family (ETFE, FEP, PFA, PTFE) one set of fractional sizes; the page does not break out PTFE alone, so these are sizes in which PTFE tube is made, not a PTFE-only table. Standard-wall and thin-wall tubing are sized by nominal ID: 1/8 in 0.125 (range 0.120–0.130), 3/16 in 0.192 (0.188–0.198), 1/4 in 0.255 (0.250–0.260), 5/16 in 0.321 (0.313–0.332), 3/8 in 0.387 (0.375–0.394), 1/2 in 0.515 (0.500–0.520 in). The ID-by-size table prints a 1/8 row twice (0.120 / 0.125 / 0.130 and 0.125 / 0.130 / 0.135) and the wall table also has two 1/8 rows, but the datasheet does not label which is which; both are shown, in the datasheet's order, without pairing them. - Wall (nominal ± tolerance, in), per size: 1/8 in standard 0.020 ±0.004, thin 0.015 ±0.003 (and a lightweight 0.008 ±0.002 row); 3/16 in 0.020 / 0.015 / lightweight 0.010; 1/4 in 0.020 / 0.015 / lightweight 0.010; 5/16 in 0.020 / 0.015 / lightweight 0.012; 3/8 in 0.025 / 0.015 / lightweight 0.015; 1/2 in 0.025 / 0.018 / lightweight 0.018. The datasheet does not print the OD for these; adding 2 × wall to the ID is arithmetic left to the reader, and the nominal ID is not a design dimension within its range. - 'Industrial specification tubing' is sized differently and the datasheet prints ID and OD together: 1/16 in 0.063 × 0.125, 1/8 in 0.125 × 0.188, 3/16 in 0.188 × 0.250, 1/4 in 0.250 × 0.313, 5/16 in 0.313 × 0.375, 3/8 in 0.375 × 0.438, 1/2 in 0.500 × 0.563 in (tolerance ±0.005 in, ±0.006 in for 1/2 in; in mm 1.60 × 3.18 up to 12.70 × 14.30). The wall is printed as 0.30 in in the inch column but 0.76 mm in the mm column, and (OD − ID) ÷ 2 is 0.031 in, so 0.76 mm (about 0.030 in) is the number used; the inch printing '0.30' is a typo in the datasheet. - AWG-sized fluoropolymer tubing (catalog sizes by wire gauge) exists in the same catalog but its table was not read cleanly and is not on this page. Pressure, temperature and chemical data are not copied. Related tubing: nylon-tubing-inch-metric-sizes, tygon-vinyl-tubing-e-3603-sizes, polyethylene-tubing-lldpe-sizes. No files: tubing is not drawn as a fixed shape. table nominal size ID, in (min / nominal / max or ID ± tol.) ID, mm wall or OD wall mm / note Fractional size by ID (min / nominal / max) 1/8 0.120 / 0.125 / 0.130 3.05 / 3.18 / 3.30 — — Fractional size by ID (min / nominal / max) 1/8 0.125 / 0.130 / 0.135 3.18 / 3.30 / 3.43 — — Fractional size by ID (min / nominal / max) 3/16 0.188 / 0.192 / 0.198 4.78 / 4.88 / 5.03 — — Fractional size by ID (min / nominal / max) 1/4 0.250 / 0.255 / 0.260 6.35 / 6.48 / 6.60 — — Fractional size by ID (min / nominal / max) 5/16 0.313 / 0.321 / 0.332 7.95 / 8.15 / 8.43 — — Fractional size by ID (min / nominal / max) 3/8 0.375 / 0.387 / 0.394 9.53 / 9.83 / 10.01 — — Fractional size by ID (min / nominal / max) 1/2 0.500 / 0.515 / 0.520 12.70 / 13.08 / 13.21 — — Wall, nominal ± tolerance (in) 1/8 — — standard 0.020 ±0.004 (0.51 mm); thin 0.015 ±0.003 (0.38 mm) — Wall, nominal ± tolerance (in) 1/8 — — lightweight 0.008 ±0.002 (0.20 mm) — Wall, nominal ± tolerance (in) 3/16 — — standard 0.020 ±0.004 (0.51 mm); thin 0.015 ±0.003 (0.38 mm); lightweight 0.010 ±0.003 (0.25 mm) — Wall, nominal ± tolerance (in) 1/4 — — standard 0.020 ±0.004 (0.51 mm); thin 0.015 ±0.003 (0.38 mm); lightweight 0.010 ±0.003 (0.25 mm) — Wall, nominal ± tolerance (in) 5/16 — — standard 0.020 ±0.004 (0.51 mm); thin 0.015 ±0.003 (0.38 mm); lightweight 0.012 ±0.003 (0.30 mm) — Wall, nominal ± tolerance (in) 3/8 — — standard 0.025 ±0.005 (0.64 mm); thin 0.015 ±0.003 (0.38 mm); lightweight 0.015 ±0.005 (0.38 mm) — Wall, nominal ± tolerance (in) 1/2 — — standard 0.025 ±0.005 (0.64 mm); thin 0.018 ±0.004 (0.46 mm); lightweight 0.018 ±0.005 (0.46 mm) — Industrial specification tubing 1/16 0.063 ±0.005 1.60 ±0.13 OD 0.125 ±0.005 in (3.18 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 1/8 0.125 ±0.005 3.18 ±0.13 OD 0.188 ±0.005 in (4.78 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 3/16 0.188 ±0.005 4.78 ±0.13 OD 0.250 ±0.005 in (6.35 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 1/4 0.250 ±0.005 6.35 ±0.13 OD 0.313 ±0.005 in (7.95 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 5/16 0.313 ±0.005 7.95 ±0.13 OD 0.375 ±0.005 in (9.53 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 3/8 0.375 ±0.005 9.53 ±0.13 OD 0.438 ±0.005 in (11.13 ±0.13 mm) 0.76 mm (printed; the inch column prints '0.30') Industrial specification tubing 1/2 0.500 ±0.006 12.70 ±0.15 OD 0.563 ±0.006 in (14.30 ±0.15 mm) 0.76 mm (printed; the inch column prints '0.30') Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Zeus Industrial Products: Extruded tubing (V2R4): fractional sizes by ID, wall dimensions (standard, thin, lightweight) and industrial-specification tubing ID x OD — web — Maker datasheet; numbers only — https://www.zeusinc.com/wp-content/uploads/2021/11/Extruded-Tubing-Extrusions-V2R4.pdf 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=ptfe-fep-pfa-tubing-fractional-sizes