SAME DAY SHIPPING
— Order by 2pm EST.
Toggle Nav
Cart
Search
main product photo

#4 X #3 MJIC UNION

Ask A Question

Description & Features

This straight steel #4 X #3 MJIC UNION, part of the 2403 series, is designed for hydraulic applications requiring a secure and reliable connection. Featuring male JIC SAE 37-degree flare threads on both ends, this union ensures a tight seal and optimal performance.

The union is constructed from a raw straight steel material, offering durability and strength in demanding environments. With a maximum dynamic pressure rating of 7,500 PSI, it is suitable for high-pressure hydraulic systems. The thread sizes are 7/16-20 and 3/8-24, both adhering to SAE J514 specifications.

SKU: 2403-04-03

Supplier Part Number (MPN): 2403-04-03

Alternate Part Numbers: A2027-4-3S

Specifications

Connection Size 1
1/4 in
Connection Size 2
3/16 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
1.3 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
1/2 in
Material
Steel
Material Construction
12L14/C1045 Steel
Series
2403 Series
Thread 2 Drill Dimensions
0.125 in
Thread B1 Drill Dimensions
0.172 in
Thread Size
7/16-20 x 3/8-24

Product Questions & Answers (1)

Sign In Hover me Please sign in to submit a question
Question by: Ralph A on Feb 14, 2026, 3:15 PM
what's the pressure rating on this union, and will it hold up on a system running pretty steady around 6,000 PSI?
Answer by: Customer Support on Feb 16, 2026, 10:27 AM
At 7,500 PSI max dynamic pressure, it's got a solid margin above 6,000 PSI for regular hydraulic system use. That rating covers dynamic conditions, so it's not just a static benchmark. For a system running steady in that range, this union should handle it without issue.

Tell us what you need and we'll get back to you.

Fields marked * are required.