NPT is imperial, BSP is metric. Description is metric, No. There are NPT to BSP fittings available in a variety of shapes & sizes.

Does the female QD have a check valve to stop flow when disconnected?

No, this is a straight thru coupler. Not like some female garden variety connectors. Bf

Is this what you need to quick connect 2 pressure washer hoses together?

No it’s for connecting tools to the airline

does this allow the hose to swival

I think it should BUT, I ended up NOT using it .

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Twinkle Star 3/8 Inch Quick Connect Fitting Pressure Washer Adapter Set, TWIS293

Twinkle Star 3/8 Inch Quick Connect Fitting Pressure Washer Adapter Set, TWIS293

Product ID: 48495448

Details

Brand
Twinkle Star
Color
3/8" plug + F
Connector Type
Adapter Plug
Exterior Finish
Brass Steel
Manufacturer
Twinkle Star
Material
Stainless

🔩3/8 Inch NPT quick connect fittings

⚙️5000 PSI pressure resistance

🛡️Anti-rust iron & brass build

Description

⚡ Connect Fast, Clean Faster — The Ultimate Pressure Washer Upgrade!

BUILT TO LAST - Premium iron and brass with anti-rust treatment means zero leaks and zero fade, even under heavy use.
COMPLETE 4 PIECE SET - Includes 2 quick sockets and 2 quick plugs for versatile connection options right out of the box.
UNIVERSAL COMPATIBILITY - Seamlessly fits most M22 and quick-connect pressure washer fittings—no adapters needed.
EFFORTLESS QUICK CONNECT - Snap on and off in seconds—cut your setup time and get cleaning faster.
PRESSURE PROOF PERFORMANCE - Handles up to 5000 PSI, perfect for both hot and cold water applications without compromise.

The Twinkle Star 3/8 Inch Quick Connect Fitting Pressure Washer Adapter Set (TWIS293) is a durable, anti-rust iron and brass kit designed for seamless, leak-free connections. Rated for up to 5000 PSI, it supports hot and cold water use and fits most M22 and quick-connect fittings, making it an essential upgrade for efficient, professional-grade cleaning.

Specifications

ASIN	B073QPFX9F
Best Sellers Rank	#434,770 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #5,523 in Pressure Washer Accessories
Brand	Twinkle Star
Brand Name	Twinkle Star
Color	3/8" plug + 3/8" F, 3/8" QD + 3/8" F
Connector Type	Adapter, Plug
Customer Reviews	4.5 out of 5 stars 649 Reviews
Exterior Finish	Brass, Stainless Steel
Included Components	1 pieces 3/8" quick socket to 3/8" NPT female thread, 1 pieces 3/8" quick plug to 3/8" NPT female thread
Manufacturer	Twinkle Star
Manufacturer Part Number	TWIS293
Material	Stainless Steel
Material Type	Stainless Steel
Model Number	TWIS293
Number of Pieces	1
Set Name	3/8 Inch Quick Connect Fitting Pressure Washer Adapter Set
Size	1 Pack
Thread Size	0.375 inch
Thread Type	NPT
UPC	724190820155
Unit Count	1 Count

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