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Steel Tube Fitting, JIC 37 deg Flare Nut for 0.31 Inch OD Tube

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Description & Features

Ideal for hydraulic applications, the Steel Tube Fitting, JIC 37 deg Flare Nut is designed for use with 0.31 inch OD tubes, ensuring precise connections in demanding environments. Manufactured by Eaton Aeroquip, this fitting exemplifies high-quality engineering, crafted from durable materials to withstand rigorous fluid dynamics. The JIC 37-degree flare design provides reliable sealing and a secure fit, minimizing potential leaks and maintaining system integrity.

This component is part of the Aeroquip 1290 Series and is a versatile spare part known for its compatibility across various systems. With dimensions measuring A: 0.67 and B: 0.62, it fits seamlessly into existing setups. The nut's design is supported by detailed fluid compatibility documentation, which can be referenced for specific application needs.

SKU: 1290-5S

Supplier Part Number (MPN): 1290-5S

Alternate Part Numbers: C1AJ79, MI-00317412, MINO-00015F64631

Specifications

A
0.67
B
0.62
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
Series
1290
Supplier Part Number
1290-5S
Tube O.D.
0.31
Tube O.D.
0.31
Alternate Part Numbers
Alternate Part Number C1AJ79, Alternate Part Number MI-00317412, Alternate Part Number MINO-00015F64631, Alternate Part Number MINO-00925X08328
Product Weight
0.05 lbs

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Product Questions & Answers (3)

Question by: Neil B on Jul 18, 2025, 7:54 AM
Got a line running 5/16 OD tube and need a new flare nut, this the right part for that size?
Answer by: Customer Support on Jul 19, 2025, 1:01 PM
For 5/16 inch OD tube, you want to be looking at a different size. This fitting is spec'd for 0.31 inch OD tube, which works out to roughly 5/16 inch, so yes, that lines up. The A dimension runs 0.67 and the B dimension is 0.62, so double-check those measurements against your existing hardware before ordering to make sure everything seats right.
Question by: Brett B on Aug 24, 2025, 2:03 PM
got a 0.31 inch OD tube with a JIC 37 flare on it, is this the right nut to replace the one i lost
Answer by: Customer Support on Aug 26, 2025, 6:49 AM
For a 0.31 inch OD tube using a JIC 37 degree flare, this part matches that application. It is an Eaton Aeroquip 1290 Series Versil-Flare spare flare nut meant for that tube size.
Question by: Scott S on Mar 24, 2026, 8:33 PM
Will this nut work on a standard JIC 37 degree flare fitting?
Answer by: Customer Support on Mar 26, 2026, 6:44 PM
As long as the tube is 0.31 inch OD, then yes, this JIC 37 degree flare nut should work.