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Brass Adapter, 3/8-18 Male NPT To 1/2-20 Male SAE 45 deg Flare, Straight

Description & Features

This brass adapter produced by Midland Industries connects a 3/8-18 male NPT thread to a 1/2-20 male SAE 45 degree flare thread. Ideal for industrial applications requiring efficient and reliable connections.

Manufactured without thread sealant ensuring suitability for various fluid transfer systems. Its robust brass construction ensures durability and a dependable seal in demanding environments.

With a tube outer diameter of 0.31 inches it offers consistent and stable installation. The unique 45-degree flare design ensures optimal fluid flow and connection integrity.

Catalog Number: C1BG43

Supplier Part Number: 248X5X6

Specifications

A 1.38	Alternate Part Numbers Alternate Part Number C1BG43, Alternate Part Number MI-08754455, Alternate Part Number MINO-01769X80114	Brand Midland Industries	Brand Midland Industries	Pack Size 1.00	UOM EA	Supplier Part Number 248X5X6	Thread 1 3/8-18	Thread 2 1/2-20	Thread Sealant No	Tube O.D. 0.31	Tube O.D. 0.31	Product Weight 0.07 lbs

Similar Products

Model Number	Tube O.D.	Thread 1	Thread 2	A
2000-4-6B Brass Male NPT To SAE 45 deg Adapter	0.38	1/4-18	5/8-18	1.44
2000-8-8B Brass Male NPT To SAE 45 deg Adapter	0.5	1/2-14	3/4-16	1.81
248X4X6 Brass Male NPT To SAE 45 deg Adapter	0.25	3/8-18	7/16-20	1.25
248X5X6 Brass Male NPT To SAE 45 deg Adapter	0.31	3/8-18	1/2-20	1.38
248X8X12 Brass Male NPT To SAE 45 deg Adapter	0.5	3/4-14	3/4-16	1.75

Product Questions & Answers (3)

Question by: Connie G on Sep 22, 2025, 9:45 PM

got a line with 3/8-18 male NPT on one side and I need to land it into a 1/2-20 45 flare, is this the right adapter?

Answer by: Customer Support on Sep 24, 2025, 2:47 PM

For matching those exact thread callouts, this adapter is made to go from 3/8-18 male NPT on one end to 1/2-20 male SAE 45 degree flare on the other, in a straight configuration.

Question by: Brent R on Feb 12, 2026, 11:25 AM

Got a line running 3/8 NPT male on one end and need to tie into a 1/2-20 SAE 45 degree flare fitting on the other side. This adapter gonna bridge that gap straight through?

Answer by: Customer Support on Feb 13, 2026, 6:17 PM

That's exactly what it does. One end is 3/8-18 male NPT and the other is 1/2-20 male SAE 45 degree flare, so it connects those two thread types in a straight configuration. Both ends are male, so make sure your mating fittings are female on each side before ordering.

Question by: Peggy M on Dec 29, 2025, 5:41 PM

Will this fitting work to hook up a fuel line to my carburetor? It's a 3/8 NPT.

Answer by: Customer Support on Dec 31, 2025, 11:37 AM

This adapter is designed to connect a 3/8-18 male NPT thread to a 1/2-20 male SAE 45 degree flare thread. It's made of brass for durability.