# Garden hose thread (GHT 3/4-11.5 NH) dimensions, hose sizes, BSP G3/4 and Gardena for comparison

> What thread is a garden hose?

- Category: Hardware › Pipe & fittings
- Kind: Standard part
- Basis: ASME B1.20.7 table (Machinery's Handbook), Dixon fitting guide; ISO 228 for BSP; Gardena product pages
- Page: https://xemstudio.com/objects/garden-hose-thread/ · JSON: https://xemstudio.com/api/geometry?object=garden-hose-thread · Plain text: https://xemstudio.com/objects/garden-hose-thread/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- US garden hose: 3/4-11.5 NH (GHT): 11.5 threads per inch (2.209 mm pitch). Male nipple major Ø26.56–26.99, pitch Ø25.34–25.55, minor ≤24.12 mm. Female coupling major ≥27.24, minor 24.37–24.80.
- It is NOT pipe thread: 3/4 in NPT (14 TPI, tapered) and BSP G3/4 (14 TPI, Ø26.44 major) look close and cross-thread; GHT seals on the washer, not the threads.
- Hose sizes are inside diameters: 1/2, 5/8 (a Flexzilla 5/8 is 15.7 mm ID), 3/4 in; ODs are not published.
- Europe: taps are G3/4 (Gardena '26.5 mm'), G5/8 ('23 mm') and G1/2 ('21 mm'); Gardena click-coupling geometry is not published.
- Printed GHT parts (free STL): male thread drawn slightly under (major 26.6, minor 24.1) so it threads into real couplings; use the rubber washer to seal, PETG or ASA outdoors.

## Sizes

| thread | TPI | pitch_mm | major_mm | minor_mm |
|---|---|---|---|---|
| GHT 3/4-11.5 NH male | 11.5 | 2.209 | 26.56–26.99 | ≤24.12 |
| GHT female coupling | 11.5 | 2.209 | ≥27.24 | 24.37–24.80 |
| BSP G3/4 (ISO 228) | 14 | 1.814 | 26.441 | 24.117 |

## Where the files are

- Machinery's Handbook (ASME B1.20.7 table): [Hose coupling screw threads](https://online.flippingbook.com/view/954046886/744-745/) — web — Publisher's page; dimensions are facts
- Dixon Valve: [Thread identification guide](https://canada.dixonvalve.com/en/media/1409739) — web — Publisher's page; dimensions are facts
- PRESSOL: [Whitworth pipe thread ISO 228 (G3/4)](https://www.pressol.com/informationen/spezifikationsdokumente-gewinde/zylindrisches-whitworth-rohrgewinde-nach-diniso-228/?lang=en) — web — Publisher's page; dimensions are facts
- Gardena: [Tap connector thread sizes](https://www.gardena.com/za/products/watering/hose-fittings/tap-connector/970565601.html) — web — Publisher's page; dimensions are facts
- Alaska Rubber Group (spec): [Flexzilla 5/8 in hose](https://www.alaskarubbergroup.com/flexzilla-hfzg550yw-green-polymer-garden-hose-5/8-in-50-ft-l-150-psi) — web — Publisher's page; dimensions are facts

## Free STEP/STL (3 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/garden-hose-thread/index.json

- ght-male-nipple-12mm: [STEP](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-nipple-12mm.step) · [STL](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-nipple-12mm.stl) — 3/4-11.5 GHT male nipple, 12 mm of thread, hex grip, Ø13 bore
- ght-male-to-13mm-tube: [STEP](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-to-13mm-tube.step) · [STL](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-to-13mm-tube.stl) — 3/4-11.5 GHT male to a Ø13 socket (1/2 in tubing / drip line)
- ght-male-to-16mm-tube: [STEP](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-to-16mm-tube.step) · [STL](https://xemstudio.com/files/hardware/garden-hose-thread/ght-male-to-16mm-tube.stl) — 3/4-11.5 GHT male to a Ø16 socket (5/8 in hose barb sleeve)

## Questions

**What size thread is a garden hose?**

3/4-11.5 NH (GHT): 11.5 threads per inch, about 26.8 mm across the male thread. It is not 3/4 NPT.

## Fits with

- [E-track and L-track dimensions: slots 2.41 × 0.54 in on 2 in centers, rail widths, fittings](https://xemstudio.com/objects/e-track-and-l-track/)
- [Broom, mop, shovel and rake handle sizes and the 3/4-5 Acme broom / paint-pole thread](https://xemstudio.com/objects/broom-and-tool-handles/)