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Steel JIC 37 deg Flare Cap, 5/16-24 Thread

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Description & Features

Designed for precision and durability our Steel JIC 37 deg Flare Cap 5/16-24 Thread is essential for maintaining connection integrity in high-stress environments. Commonly utilized in hydraulic and pneumatic systems it provides a reliable seal against leaks.

Constructed from high-quality steel this cap ensures longevity and robust performance even under demanding conditions. The 37-degree flare design enhances compatibility with various tubing and fitting systems making it a versatile component.

With a thread size of 5/16-24 it fits seamlessly into your existing setup offering a straightforward and effective solution for capping fluid lines. This product is ideal for situations where a secure and leak-free connection is critical.

The innovative design by Brennan Industries Inc prioritizes both ease of installation and consistent performance making it a valuable addition to industrial assemblies.

MPN: C1DU44

Supplier Part Number: 0304-C-02

Specifications

b Dimensions
0.38 in
Connection Size 1
1/8 in
Connection Type
Female JIC
Connection Type 1
Female SAE JIC
Dimension Standards
SAE J514
Dimensions
1/2 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Cap Nut
Hex Size
3/8 in
Material
Steel
Material Construction
12L14/C1045 Steel
Series
0304-C Series
Thread Sealant
Without Thread Sealant
Thread Size
5/16-24

Product Questions & Answers (3)

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Question by: Peggy E on Dec 1, 2025, 1:33 PM
Will this cap keep hydraulic fluid from leaking out?
Answer by: Customer Support on Dec 3, 2025, 7:33 AM
Designed to provide a reliable seal, this cap is commonly used in hydraulic and pneumatic systems to prevent leaks.
Question by: Stan S on Apr 19, 2025, 8:44 AM
got a line i need to cap off, is this the right one if my fitting is 5/16-24?
Answer by: Customer Support on Apr 21, 2025, 6:06 AM
The key callout on this cap is the 5/16-24 thread. If the port or fitting you are capping uses a 5/16-24 JIC 37 degree flare connection, this is the matching cap style.
Question by: Phil H on Nov 7, 2025, 6:18 PM
got a 5/16-24 JIC line I need to plug off on a hydraulic circuit, this cap gonna work for that?
Answer by: Customer Support on Nov 9, 2025, 6:45 AM
That's what this cap is built for. The 5/16-24 thread fits standard JIC fittings, and the 37-degree flare seat gives you a solid, leak-free seal on capped-off fluid lines. Steel construction holds up well in hydraulic system pressures and regular shop conditions.

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