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The parts most likely to need an adapter

Name: The parts most likely to need an adapter
Creator: HoseFitFinder
License: https://creativecommons.org/licenses/by/4.0/

100%

Garden Hose Thread (GHT / NH) needs an adapter or does not fit in 100% of the combinations we checked, the highest share in the dataset.

Which part most often needs an adapter?

Garden Hose Thread (GHT / NH) tops the list: 11 of its 11 checked combinations (100%) need an adapter or do not fit. The full ranking is below.

#	Parts	Adapter	No fit	Adapter-or-no rate
1	Garden Hose Thread (GHT / NH)	11	0	100%
2	3/4" BSP parallel (G3/4 / BSPP)	9	0	82%
3	Male aerator thread (M22 x 1 / 15/16"-27)	5	0	100%
4	1/2" BSP parallel (G1/2 / BSPP)	4	0	100%
5	M22 x 1.5 pressure-washer, 15 mm bore	4	0	100%
6	Industrial / Milton M-style air coupler	1	3	100%
7	16 mm LDPE drip supply pipe	4	0	100%
8	3/4" NPT (National Pipe Taper)	3	0	100%
9	3/4" NPSH straight hose thread	3	0	100%
10	S60x6 IBC buttress thread	3	0	100%
11	M22 x 1.5 pressure-washer, 14 mm bore	2	0	100%
12	1/2" NPT (National Pipe Taper)	2	0	100%
13	1/4" NPT (National Pipe Taper)	2	0	100%
14	1/4" BSP parallel (G1/4 / BSPP)	2	0	100%
15	3/4" BSP tapered (R3/4 / BSPT)	2	0	100%
16	1-1/2" NH fire hose thread (NST)	2	0	100%
17	2-1/2" NH fire hose thread (NST)	2	0	100%
18	2" camlock (cam-and-groove) coupling	2	0	100%
19	Automotive / Tru-Flate T-style air coupler	1	1	100%
20	1/4 inch drip tubing	2	0	100%
21	1" BSP parallel (G1 / BSPP)	1	0	50%
22	Caravan onboard 3/4 BSP water fitting	1	0	50%
23	3/8" BSP parallel (G3/8 / BSPP)	1	0	100%
24	Female aerator thread (M24 x 1 / 55/64"-27)	1	0	100%
25	Male aerator thread (M18 x 1)	1	0	100%
26	Female aerator thread (M22 x 1)	1	0	100%
27	3/8" NPT (National Pipe Taper)	1	0	100%
28	1/2" BSP tapered (R1/2 / BSPT)	1	0	100%
29	1" NPSH straight hose thread	1	0	100%
30	1" NPT (National Pipe Taper)	1	0	100%
31	1-1/2" BSP parallel (G1-1/2 / BSPP)	1	0	100%
32	ARO 210 / A-style air coupler	0	1	100%
33	Japan / Nitto Hi-Cupla air coupler	0	1	100%
34	Euro 7.2 air coupler	0	1	100%
35	Orion 5.5 air coupler	0	1	100%
36	4/7 mm micro drip tubing	1	0	100%
37	13 mm LDPE drip supply pipe	1	0	100%
38	1/2 inch US drip tubing	1	0	100%

How this is worked out

For every part we counted the combinations that resolve to an adapter fit or a no-fit across the reference set, and ranked by that count. The rate is those combinations divided by all combinations checked for that item.

Data as of 2026-09-05.

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The parts most likely to need an adapter

Which part most often needs an adapter?

How this is worked out

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