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Quick coupler interchange chart.

Air couplers only mate with plugs of the same profile. Find your profile, see what it is also called, and see which makers build a coupler for it. Every maker row links to the maker's own catalog or page.

Profiles8

Maker series23

Makers3

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How to tell which profile you have

Start with the plug, not the coupler. The plug on the tool sets the profile. A coupler of the wrong profile may click in and still leak or blow off.
Thread size is separate from profile. A 1/4 NPT thread can sit on an Industrial, ARO or Tru-Flate body. Match the profile first, then the thread.
Not sure? Send us a photo of the plug next to a ruler, or mail us one. We will tell you the profile and quote the match.

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Profiles and who makes them

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Show maker

Industrial interchange

Also called: Milton M-style · ISO 6150 B · A-A-59439

Standard: ISO 6150 B
Body: 1/4, 3/8, 1/2

The profile on most US shop air tools. ISO calls it 6150 B.

Maker	Series	Body / size	Threads	Source
Prevost	ISI 06 / ISI 08 / ISI 11EBPrevost lists this as ISO 6150 B / Industrial	1/4 (6 mm), 3/8 (8 mm), 1/2 (11 mm)	BSP / NPT	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics
AIGNEP	80120	1/4	NPTF 1/4 male and female	AIGNEP, 80120 Series 1/4" Industrial Interchange Series page, 1/4" Industrial items
AIGNEP	80130	3/8 (DN 9)	NPTF 3/8 male and female	AIGNEP, 80130 Series 3/8" Industrial Interchange Series page, 3/8" Industrial items
AIGNEP	80190 MultisocketOne socket listed for Industrial, ARO and Tru-Flate plugs	1/4	NPTF and BSPP, 1/4 to 1/2	AIGNEP, 80190 Series 1/4" Multisocket Series page, profile list
AIGNEP	80720 B-SocketListed for 3/8 Industrial and 3/8 Tru-Flate plugs	3/8 (DN 9)	NPTF 3/8 male and female	AIGNEP, 80720 Series B-Socket Top Flow Series page, profile list
CEJN	310	5.3 mm bore (1/4 body)	NPT 1/8 to 1/2, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 310 tables, PDF pages 16-17
CEJN	430	8.2 mm bore (3/8 body)	NPT 1/4 to 3/4, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 430 tables, PDF pages 29
CEJN	550	11 mm bore (1/2 body)	NPT 1/4 to 3/4, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 550 tables, PDF pages 31-32

Profile naming per CEJN, Pneumatic catalog (US), Nipple guide, PDF page 8 (ISO 6150 B, A-A 59439).

ARO 210

Also called: Milton A-style · ARO interchange

Body: 1/4

Looks close to Industrial but it is a different profile. Check the plug before you order.

Maker	Series	Body / size	Threads	Source
Prevost	ASI 06	1/4 (6 mm)	BSP / NPT	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics
AIGNEP	80190 MultisocketOne socket listed for Industrial, ARO and Tru-Flate plugs	1/4	NPTF and BSPP, 1/4 to 1/2	AIGNEP, 80190 Series 1/4" Multisocket Series page, profile list
CEJN	300	5.5 mm bore (1/4 body)	NPT 1/8 to 1/2, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 300 tables, PDF pages 13-14

Profile naming per CEJN, Pneumatic catalog (US), Nipple guide, PDF page 8 (ARO 210 Standard, 5.5 mm).

Tru-Flate / Automotive

Also called: Milton T-style · Automotive

Body: 1/4, 3/8, 1/2

Prevost sells this profile as Automotive.

Maker	Series	Body / size	Threads	Source
Prevost	USI 06 / USI 08 / USI 11EBPrevost calls this profile Automotive	1/4 (6 mm), 3/8 (8 mm), 1/2 (11 mm)	BSP / NPT	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics
AIGNEP	80190 MultisocketOne socket listed for Industrial, ARO and Tru-Flate plugs	1/4	NPTF and BSPP, 1/4 to 1/2	AIGNEP, 80190 Series 1/4" Multisocket Series page, profile list
AIGNEP	80720 B-SocketListed for 3/8 Industrial and 3/8 Tru-Flate plugs	3/8 (DN 9)	NPTF 3/8 male and female	AIGNEP, 80720 Series B-Socket Top Flow Series page, profile list

Profile naming per Prevost, prevoS1 safety couplings catalog (US), Popular profiles list, PDF page 3; profile table, PDF page 8 (Automotive).

Lincoln

Also called: Milton L-style

None of the makers we checked publish a coupler for this profile. We can still source one. Ask us.

Profile naming per Milton, 5-in-ONE universal safety exhaust coupler, product write-up, list of interchanges (Lincoln, L-Style).

European (7.4 mm)

Also called: Eurostandard · Prevost High Flow

Body: 7.4 mm and 10.4 mm bore

Bigger bore and more flow than a 1/4 Industrial coupler. Not the same as ISO 6150 C.

Maker	Series	Body / size	Threads	Source
Prevost	ESI 07 / ESI 11EBPrevost calls this profile High Flow	3/8 (7.4 mm), 1/2 (10.4 mm)	BSP / NPT	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics
AIGNEP	160	DN 7.5 to 7.8	1/4, 3/8, 1/2	AIGNEP, 160 Series quick couplings Series page, profile EUROPEAN
CEJN	320	7.4 mm bore	NPT 1/8 to 1/2, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 320 tables, PDF pages 20-21
CEJN	410	10.4 mm bore	NPT 3/8 to 3/4, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 410 tables, PDF pages 26-27

Profile naming per CEJN, Pneumatic catalog (US), Nipple guide, PDF page 8 (Eurostandard 7.4 mm and 10.4 mm).

ISO 6150 C

Standard: ISO 6150 C
Body: 5.5, 8 and 11 mm bore

A separate ISO profile. It does not mate with ISO 6150 B (Industrial) plugs.

Maker	Series	Body / size	Threads	Source
Prevost	CSI 06 / CSI 08	1/4 (6 mm), 3/8 (8 mm)	BSP / NPT	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics
CEJN	291 / 381 / 471	5.5 mm, 8 mm, 11 mm bore	See source	CEJN, Pneumatic catalog (US) Nipple guide, PDF page 8

Profile naming per CEJN, Pneumatic catalog (US), Nipple guide, PDF page 8 (ISO 6150 C, 5.5 / 8 / 11 mm).

Asian / Japanese (7.5 mm)

Also called: Asian standard · Japanese profile

Body: 7.5 mm bore

People often ask for this one by the Hi-Cupla name. None of the makers below use that name, so send us the plug or a photo and we will confirm the match.

Maker	Series	Body / size	Threads	Source
AIGNEP	400	DN 7.5	1/4, 3/8, 1/2	AIGNEP, 400 Series quick couplings Series page, profile JAPANESE
CEJN	315	7.5 mm bore	NPT 1/4 to 1/2, BSP (G and R)	CEJN, Pneumatic catalog (US) Nipple guide PDF page 8; Series 315 tables, PDF pages 18-19

Profile naming per CEJN, Pneumatic catalog (US), Nipple guide, PDF page 8 (Asian Standard, 7.5 mm).

British

Body: 1/4

Prevost lists it with BSP threads only.

Maker	Series	Body / size	Threads	Source
Prevost	BSI 06	1/4 (6 mm)	BSP only	Prevost, prevoS1 safety couplings catalog (US) PDF page 8 profile table; PDF page 11 profiles characteristics

Profile naming per Prevost, prevoS1 safety couplings catalog (US), Popular profiles list, PDF page 3; profile table, PDF page 8.

Series, sizes and threads are as each maker publishes them, checked October 2026. Makers change their ranges, so we confirm the exact part number on every quote. Brand names belong to their owners and are used only to identify the part.

Mixed tools on one air line?

Tell us which profiles you run and how many drops you have. We will put together the couplers and plugs to match, or one profile to switch the whole shop to.

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