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Male Npt X Fixed Female Bspp

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Description & Features

Constructed from steel in a straight configuration, this Adaptall adapter provides a reliable threaded connection between a 3/8" Male NPT (NPTF) port and a 1/4" Fixed Female BSPP port. It bridges two of the most common thread standards used in hydraulic and industrial fluid systems, making it a practical solution when equipment with G 1/4-19 BSPP ports must interface with 3/8-18 NPTF connections.

The Male NPT X Fixed Female BSPP measures 35.2mm in length with a 22mm CH width, fitting standard wrench engagement for straightforward installation. The fixed female BSPP end uses a parallel thread form sealed by a bonded seal or face seal method, while the male NPTF side relies on tapered thread engagement for a pressure-tight connection. Steel construction provides durability suitable for demanding hydraulic circuit applications.

SKU: 9037-06-04

Supplier Part Number (MPN): 9037-06-04

Specifications

Brand
adapt-all
Connection Size 1
3/8 in
Connection Size 2
1/4 in
Connection Type
Female BSP, MNPT
Connection Type 1
Male NPT
Connection Type 2
Female BSPP
Dimension Standards
ANSI B1.20.3, BS 5200
Dimensions
36 mm L
Finish
Zinc-Plated
Fitting Type
Adapter
Hex Size
22 mm
Material
Steel
Material Construction
Carbon Steel
Series
9037 Series
Thread Size
1/4-19 x 3/8-18

Product Questions & Answers (3)

Question by: Cheryl W on Dec 21, 2025, 9:45 PM
Got a piece of equipment with a G 1/4-19 BSPP port on it and need to tie into a 3/8-18 NPTF line. this adapter handle that crossover?
Answer by: Customer Support on Dec 23, 2025, 4:01 PM
That's exactly what this fitting is built for. One end is a 3/8-18 NPTF male thread that engages by taper for a pressure-tight seal, and the other end is a G 1/4-19 fixed female BSPP port that seals via a bonded seal or face seal method. Steel construction, straight configuration, 35.2mm long with a 22mm wrench flat. It connects those two thread standards directly without needing additional adapters in between.
Question by: Denise T on Jun 17, 2025, 7:41 AM
What size wrench do I need to tighten this adapter down good and snug?
Answer by: Customer Support on Jun 18, 2025, 9:53 PM
This adapter is made with a 22mm CH width, so a standard 22mm wrench should work just fine for installation.
Question by: Scott Y on Jan 14, 2026, 2:28 PM
i've got a G 1/4-19 bsp port on a valve block and my hose end is 3/8-18 nptf. is this the right adapter to tie those together?
Answer by: Customer Support on Jan 15, 2026, 7:06 PM
For that mix of threads, yes. This adapter is made to connect a 3/8-18 NPTF male end to a G 1/4-19 BSPP fixed female end, so it bridges those two common standards in hydraulic and industrial fluid setups.

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