Skip to the beginning of the images gallery

8 JIC STEEL CAP NUT

Description & Features

Crafted by Brennan Industries Inc. this fitting is ideal for demanding industrial applications that require reliability and durability. Made from straight steel it maintains a maximum dynamic pressure of 6 000 psi.

The stainless steel construction features a female JIC SAE 37-degree flare type thread and complies with SAE J514 specifications. This ensures compatibility and secure connections.

With a C Hex dimension of 0.875 mm and an overall length of 0.750 mm the fitting is designed for precise and secure attachment. It is compatible with Tube OD 1/2 inch.

Occupying a cubic inch space of 0.574 it provides optimal performance while being compact.

For safety information California residents should refer to the PROP-65 warning.

Supplier Part Number: 0304-C-08

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 0304-C-08	Product Weight 0.08 lbs

Product Questions & Answers (3)

Question by: Judy G on Oct 9, 2025, 7:17 PM

got a 1/2 inch tube with a JIC 37 flare, is this the right cap nut to close it off?

Answer by: Customer Support on Oct 11, 2025, 7:13 PM

For a 1/2 inch tube size JIC 37 degree flare connection, this cap nut matches that setup. It uses a female JIC SAE 37 degree flare thread with a 3/4-16 thread (SAE J514), so it’s meant to cap off that size flare fitting.

Question by: Floyd M on Jun 5, 2025, 1:54 PM

What size tubing does this cap fit, exactly? Gotta make sure I get the right one.

Answer by: Customer Support on Jun 6, 2025, 6:39 PM

It's made to fit tubing with a 1/2 inch outer diameter.

Question by: Vince B on Dec 10, 2025, 8:43 AM

what's the max pressure rating on this cap nut, and is it gonna hold up in a hydraulic system running pretty hard?

Answer by: Customer Support on Dec 12, 2025, 6:22 AM

Rated at 6,000 psi maximum dynamic pressure, it's built to handle demanding hydraulic applications without issue. The straight steel construction and SAE J514-compliant female JIC 37-degree flare thread make it a solid choice for high-pressure line capping where a secure, leak-free connection is what you need.