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#3 X #2 MJIC UNION

Description & Features

A straight steel union fitting, the #3 X #2 MJIC Union connects two male JIC SAE 37-degree flare threads of differing dash sizes in a single inline assembly. Thread B1 is sized at 3/8-24 (SAE J514), while Thread B2 measures 5/16-24 (SAE J514), making this a reducing union suited for hydraulic lines where a size transition is required without additional adapters.

Manufactured by Brennan Industries from straight steel construction, this fitting is rated to a maximum dynamic pressure of 7,500 PSI. Both connection ends conform to SAE J514, ensuring compatibility with standard JIC flare fittings commonly used in mobile hydraulic and industrial fluid power systems. California residents should note that this product carries a Proposition 65 warning.

SKU: 2403-03-02

Supplier Part Number (MPN): 2403-03-02

Alternate Part Numbers: C1BF50

Specifications

Brand BRENNAN	Connection Size 1 3/16 in	Connection Size 2 1/8 in	Connection Type Male JIC	Connection Type 1 Male SAE 37 deg JIC Flare	Connection Type 2 Male SAE 37 deg JIC Flare	Dimension Standards SAE J514	Dimensions 1.2 in L	Finish Trivalent Zinc-Plated	Fitting Type Adapter	Hex Size 7/16 in	Material Steel	Material Construction 12L14/C1045 Steel	Series 2403 Series	Thread 2 Drill Dimensions 0.062 in	Thread B1 Drill Dimensions 0.125 in	Thread Size 5/16-24, 3/8-24

Similar Products

Model Number	Connection Size 1	Connection Size 2	Material Construction	Thread Size	Hex Size
2403-02-02	1/8 in	1/8 in	12L14/C1045 Steel	5/16-24	7/16 in
2403-03-03	3/16 in	3/16 in	12L14/C1045 Steel	3/8-24	7/16 in
2403-04-02	1/4 in	1/8 in	12L14/C1045 Steel	7/16-20 x 5/16-24	1/2 in
2403-04-03	1/4 in	3/16 in	12L14/C1045 Steel	7/16-20 x 3/8-24	1/2 in
2403-04-04	1/4 in	1/4 in	12L14/C1045 Steel	7/16-20	1/2 in
2403-05-04	5/16 in	1/4 in	12L14/C1045 Steel	1/2-20 x 7/16-20	0.563 in
2403-05-05	5/16 in	5/16 in	12L14/C1045 Steel	1/2-20	0.563 in
2403-06-04	3/8 in	1/4 in	12L14/C1045 Steel	9/16-18, 7/16-20	5/8 in
2403-06-05	3/8 in	5/16 in	12L14/C1045 Steel	9/16-18 x 1/2-20	5/8 in
2403-06-06	3/8 in	3/8 in	12L14/C1045 Steel	9/16-18	5/8 in
2403-08-04	1/2 in	1/4 in	12L14/C1045 Steel	3/4-16 x 7/16-20	0.81 in
2403-08-05	1/2 in	5/16 in	12L14/C1045 Steel	1/2-20 x 3/4-16	0.81 in
2403-08-06	1/2 in	3/8 in	12L14/C1045 Steel	3/4-16, 9/16-18	0.81 in
2403-08-08	1/2 in	1/2 in	12L14/C1045 Steel	3/4-16	0.81 in
2403-10-04 Steel Male JIC To JIC Adapter	5/8 in	1/4 in	AISI 12L14/C1045 Steel	7/8-14 x 7/16-20	0.94 in
2403-10-06	5/8 in	3/8 in	12L14/C1045 Steel	7/8-14 x 9/16-18	0.94 in
2403-10-08	5/8 in	1/2 in	12L14/C1045 Steel	7/8-14 x 3/4-16	0.94 in
2403-10-10	5/8 in	5/8 in	12L14/C1045 Steel	7/8-14	0.94 in
2403-12-04	3/4 in	1/4 in	12L14/C1045 Steel	1-1/16-12 x 7/16-20	1-1/8 in
2403-12-06 Steel Male JIC To JIC Adapter	3/4 in	3/8 in	AISI 12L14/C1045 Steel	1-1/16-12 x 9/16-18	1-1/8 in
2403-12-08	3/4 in	1/2 in	12L14/C1045 Steel	3/4-16 x 1-1/16-12	1-1/8 in
2403-12-10	3/4 in	5/8 in	12L14/C1045 Steel	7/8-14 x 1-1/16-12	1-1/8 in
2403-12-12	3/4 in	3/4 in	12L14/C1045 Steel	1-1/16-12	1-1/8 in
2403-14-12 Steel Male JIC To JIC Adapter	7/8 in	3/4 in	AISI 12L14/C1045 Steel	1-3/16-12 x 1-1/16-12	1-1/4
2403-14-14	7/8 in	7/8 in	12L14/C1045 Steel	1-3/16-12	1-1/4
2403-16-08	1 in	1/2 in	12L14/C1045 Steel	1-5/16-12, 3/4-16	1-3/8 in
2403-16-10	1 in	5/8 in	12L14/C1045 Steel	7/8-14 x 1-5/16-12	1-3/8 in
2403-16-12	1 in	3/4 in	12L14/C1045 Steel	1-5/16-12 x 1-1/16-12	1-3/8 in
2403-16-16	1 in	1 in	12L14/C1045 Steel	1-5/16-12	1-3/8 in
2403-20-12	1-1/4 in	3/4 in	12L14/C1045 Steel	1-5/8-12 x 1-1/16-12	1.688 in
2403-20-16	1-1/4 in	1 in	12L14/C1045 Steel	1-5/8-12 x 1-5/16-12	1.688 in
2403-20-20	1-1/4 in	1-1/4 in	12L14/C1045 Steel	1-5/8-12	1.688 in
2403-24-16	1-1/2 in	1 in	12L14/C1045 Steel	1-7/8-12 x 1-5/16-12	2 in
2403-24-20	1-1/2 in	1-1/4 in	12L14/C1045 Steel	1-7/8-12, 1-5/8-12	2 in
2403-24-24	1-1/2 in	1-1/2 in	12L14/C1045 Steel	1-7/8-12	2 in
2403-32-24	2 in	1-1/2 in	12L14/C1045 Steel	2-1/2-12 x 1-7/8-12	2-5/8 in
2403-32-32	2 in	2 in	12L14/C1045 Steel	2-1/2-12	2-5/8 in
2403-48-48	3 in	3 in	12L14/C1045 Steel	3-1/2-12

Product Questions & Answers (1)

Question by: Brett R on Feb 24, 2026, 10:56 AM

Is this the right kinda fitting to join two JIC lines that are different sizes? Like, if I need to go from a bigger line to a smaller one without using a bunch of extra parts?

Answer by: Customer Support on Feb 25, 2026, 6:15 PM

Exactly right. This union is designed to connect two male JIC lines with different dash sizes in a single go, so you can transition between sizes cleanly.

#3 X #2 MJIC UNION

Description & Features

Specifications

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Product Questions & Answers (1)