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#20 X #16 MJIC UNION

Description & Features

Constructed from straight steel, the #20 X #16 MJIC Union is a reducing union fitting designed to connect two Male JIC SAE 37-degree flare lines of different sizes within a single inline assembly. Both ends conform to SAE J514, with the larger end threading at 1-5/8-12 and the smaller at 1-5/16-12. This size transition makes the fitting well suited for hydraulic circuits where line sizing changes between components or assemblies.

Rated to 4,000 PSI maximum dynamic pressure, this Brennan Industries fitting handles demanding hydraulic service. The all-steel construction provides durability in industrial environments where corrosion resistance and mechanical strength are priorities. California residents should note that this product is subject to a Proposition 65 warning.

SKU: 2403-20-16

Supplier Part Number (MPN): 2403-20-16

Alternate Part Numbers: A2027-20-16S

Specifications

Brand BRENNAN	Connection Size 1 1-1/4 in	Connection Size 2 1 in	Connection Type Male JIC	Connection Type 1 Male SAE 37 deg JIC Flare	Connection Type 2 Male SAE 37 deg JIC Flare	Cubic Inch Space L x W x H Dimensions 6.781 cu-in	Dimension Standards SAE J514	Dimensions 2.38 in L	Finish Trivalent Zinc-Plated	Fitting Type Adapter	Hex Size 1.688 in	Material Steel	Material Construction 12L14/C1045 Steel	Maximum Operating Pressure 4000 psi	Series 2403 Series	Thread 2 Drill Dimensions 0.844 in	Thread B1 Drill Dimensions 1.078 in	Thread Size 1-5/8-12 x 1-5/16-12

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
2403-03-02	3/16 in	1/8 in	12L14/C1045 Steel	5/16-24, 3/8-24	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
2403-20-20	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 (2)

Question by: Chad S on Dec 2, 2025, 7:45 PM

trying to step down from a #20 JIC line to a #16, is this the right union for that?

Answer by: Customer Support on Dec 4, 2025, 7:05 AM

For a straight inline size change between two male JIC 37 degree flare connections, this union is made for exactly that. One end is #20 MJIC with 1-5/8-12 threads and the other end is #16 MJIC with 1-5/16-12 threads, both to SAE J514.

Question by: Kurt K on Apr 24, 2025, 12:52 PM

Just makin' sure, this'll hook up two lines with different sizes, right? Like a #20 and a #16?

Answer by: Customer Support on Apr 26, 2025, 8:53 AM

That's correct. This union fitting is specifically made to connect a #20 Male JIC SAE 37-degree flare line to a #16 Male JIC SAE 37-degree flare line.

#20 X #16 MJIC UNION

Description & Features

Specifications

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Product Questions & Answers (2)