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06 JIC CAP NUT

Description & Features

The 06 JIC cap nut is designed for demanding applications ensuring robust connection integrity under high pressure. Made from straight steel and featuring a female JIC SAE 37-degree flare thread type it complies with SAE J514 specifications making it a trustworthy component in industrial settings.

With a maximum dynamic pressure rating of 6 000 PSI and an overall length of 0.630 mm this cap nut is compact yet highly durable. Its C hex dimension is 0.687 mm and it has a 9/16-18 thread size suitable for tube OD 3/8 connections ensuring precision and reliability in every use.

Supplier Part Number: 0304-C-06

California Residents: PROP-65 WARNING

Specifications

Brand Brennan Industries Inc	Brand Brennan Industries	Pack Size 1.00	UOM EA	Supplier Part Number 0304-C-06	Product Weight 0.04 lbs

Product Questions & Answers (2)

Question by: Debbie P on Sep 9, 2025, 6:04 AM

trying to cap off a 3/8 tube JIC line, is this the right nut size?

Answer by: Customer Support on Sep 11, 2025, 7:34 AM

For a 3/8 tube OD JIC connection, this cap nut matches that size and uses a 9/16-18 female JIC SAE 37 degree flare thread per SAE J514.

Question by: Melvin T on May 10, 2025, 3:53 PM

Got a 3/8 tube line I need to cap off on a hydraulic system running around 5,500 PSI. This the right part for that?

Answer by: Customer Support on May 12, 2025, 6:00 AM

At 6,000 PSI maximum dynamic pressure, that cap nut has enough headroom for what you're running. The thread size is 9/16-18 and it's built for 3/8 OD tube connections, so as long as that matches your line, you're in good shape. It uses a female JIC SAE 37-degree flare thread, so your mating fitting needs to match that flare angle.