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Pressure Washer Quick Coupler, Female Half, 3/8 Inch Coupling, 3/8-18 Female NPT

Description & Features

The Pressure-Pro Female Pressure Washer NPT Coupler 3STF3-B is specifically engineered for seamless and reliable connections in professional pressure washer setups. Constructed from high-quality brass this coupler ensures durability and longevity under high pressure conditions rated up to 4000 PSI.

This 3/8 inch coupling with 3/8-18 female NPT threading facilitates a secure and leak-proof connection essential for commercial and industrial pressure washing applications. The female half design streamlines the replacement and maintenance process for optimized performance.

Its practical design suits a wide array of professional heavy-duty cleaning tasks ensuring efficient and effective connections. Designed by Pressure-Pro a trusted brand in the pressure washer industry this quick coupler meets rigorous standards for consistent performance and reliability.

MPN: 3STF3-B

Supplier Part Number: 3STF3-B

Specifications

Coupling Size 3/8	Brand Pressure-Pro	Brand Pressure-Pro	Pack Size 1.00	UOM EA	Materials Brass	Pressure Rating 4000	Supplier Part Number 3STF3-B	Thread 1 3/8-18	Alternate Part Numbers Alternate Part Number C1BN23, Alternate Part Number MI-08754187, Alternate Part Number MINO-17764X63333	Product Weight 0.26 lbs

Similar Products

Model Number	Coupling Size	Thread 1	Materials	Pressure Rating	A	C	Price	Action
2STF2-B Female Pressure Washer NPT Coupler	1/4	1/4-18	Brass	4000
4STF4-B Female Pressure Washer NPT Coupler	1/2	1/2-14	Brass	4000

Product Questions & Answers (3)

Question by: Rick C on Jun 12, 2025, 7:17 AM

brass hold up alright on a commercial pressure washer running 4000 PSI? don't want to swap couplers out every few months

Answer by: Customer Support on Jun 14, 2025, 6:40 AM

Brass is a solid choice for this kind of application. It handles high-pressure environments well and resists the corrosion that tends to shorten the life of cheaper couplers. Running at or near 4000 PSI is well within what this coupler is rated for, so regular commercial use shouldn't wear it down unusually fast compared to what you'd expect from a quality brass fitting.

Question by: Vince C on Sep 28, 2025, 6:45 PM

trying to swap out my old socket coupler, is this one the female half with 3/8-18 female NPT threads?

Answer by: Customer Support on Sep 30, 2025, 8:20 AM

For replacements, the key identifiers are the connection type and thread. This is the female half quick coupler socket with a 3/8 inch coupling size and 3/8-18 female NPT threading.

Question by: Kent P on Aug 9, 2025, 10:51 AM

Will this brass coupler hold up if I'm using a pressure washer at its max 4000 PSI?

Answer by: Customer Support on Aug 11, 2025, 6:01 AM

Rated to handle up to 4000 PSI, this brass coupler is built for the demands of professional pressure washing.