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

Description & Features

Manufactured from 316 stainless steel for reliable corrosion resistance in demanding industrial environments, this fitting accepts a 0.31 inch tube OD and features a 1/2-20 female JIC 37-degree flare thread connection. The JIC 37-degree flare design provides a metal-to-metal seal, making it well suited for hydraulic lines and fluid systems that require secure, leak-resistant connections under pressure.

The Stainless Steel Tube Fitting, 0.31 Inch Tube OD, Female JIC 37 Deg Flare Nut is supplied by SSP Fittings Corp under catalog number C1DA17. Stainless steel construction makes this fitting appropriate for use in corrosive media, high-purity fluid transfer, and applications where material compatibility is a primary concern.

SKU: J5N

Supplier Part Number (MPN): J5N

Alternate Part Numbers: C1DA17

Specifications

Brand Ssp Fittings Corp	Brand SSP Fittings Corp	Pack Size 1.00	UOM EA	L 0.67	Supplier Part Number J5N	Thread 2 1/2-20	Tube O.D. 0.31	Alternate Part Numbers Alternate Part Number C1DA17	Tube O.D. 0.31	Product Weight 0.04 lbs

Similar Products

Model Number	Tube O.D.	Thread 2	L
J10N Stainless Steel Tube JIC Nut	0.63	7/8-14	0.97
J12N Stainless Steel Tube JIC Nut	0.75	1-1/16-12	1.02
J4N Stainless Steel Tube JIC Nut	0.25	7/16-20	0.61
J6N Stainless Steel Tube JIC Nut	0.38	9/16-18	0.72
J16N Stainless Steel Tube JIC Nut	1	1-5/16-12	1.12
J20N Stainless Steel Tube JIC Nut	1.25	1-5/8-12	1.22
J3N Stainless Steel Tube JIC Nut	0.19	3/8-24	0.6
J5N Stainless Steel Tube JIC Nut	0.31	1/2-20	0.67

Product Questions & Answers (3)

Question by: Shane S on Dec 23, 2025, 7:23 AM

trying to replace a tube nut on a line, how do i know this one matches what ive got?

Answer by: Customer Support on Dec 24, 2025, 9:08 AM

Match it up by the tube size and the thread. This nut is for 0.31 inch tube OD and it has a 1/2-20 female JIC 37 degree flare thread, so it fits a male JIC 37 degree flare connection in that size.

Question by: Lance W on May 26, 2025, 8:28 AM

Will this fitting work with standard stainless steel tubing?

Answer by: Customer Support on May 27, 2025, 8:55 PM

This fitting is manufactured from 316 stainless steel and designed to work with 0.31 inch OD tubing.

Question by: Jimmy J on Nov 20, 2025, 12:12 PM

fitting says 0.31 inch tube OD, is that the same as 5/16 tube, or am I measuring something different?

Answer by: Customer Support on Nov 22, 2025, 10:09 AM

0.31 inch is the decimal equivalent of 5/16 inch, so yes, those are the same size. The tube OD is the outside diameter of the tubing itself, not the bore or wall thickness. As long as your tubing measures 5/16 inch on the outside, this nut will fit it correctly.