The market for 3/8-24 brake fittings is essential for anyone working on brake lines and inverted flare connections for 3/16″ tubing. This article highlights five reliable options, detailing compatibility, corrosion resistance, and typical uses. Each product is evaluated on durability, material quality, and ease of installation to help you choose the right fittings for restorations, fleet maintenance, or DIY projects.
| Product | Brand | Fitment | Material | Notes |
|---|---|---|---|---|
| The Stop Shop Pack of 12 | The Stop Shop Store | 3/8-24 / 3/16″ tube | Brass, plated | Common inverted flare sizes; corrosion resistant |
| DEWHEL Steel Tube Nuts 12 | DEWHEL Store | 3/8-24 inverted flare | Steel | Inverted flare nuts for 3/16″ tube; durable steel |
| Frienda 12 Pieces | Frienda Store | 3/8-24 threads | Brass | Includes unions and nuts; corrosion resistant |
| DEWHEL 12PCS Gold | DEWHEL Store | 3/8-24 inverted flare | Gold zinc plated steel | Gold zinc finish; durable for 3/16″ tubing |
| 3/8-24 20pc/Set Inline Nuts | Unspecified | 3/8-24 | Gold zinc finish | OEM style; common GM/GM9432075 reference |
The Stop Shop Pack Of 12 3/8″ – 24 Fittings For 3/16″ Tube

The Stop Shop 12-pack provides a broad assortment of 3/8-24 fittings suitable for 3/16″ brake lines. Constructed with corrosion-resistant plating, these fittings align with common inverted flare standards, making them a practical choice for typical drum and disc brake line repairs. The selection supports quick assembly and straightforward replacement tasks, reducing downtime on maintenance projects.
DEWHEL Steel Tube Nuts 3/8-24 Inverted Flare Zinc Fitting

This 12-piece selection focuses on steel nuts designed for 3/16″ brake line tubing with inverted flare. The robust 3/8″-24 thread size provides reliable engagement in high-pressure systems, and the zinc finish offers additional corrosion resistance essential for long-term performance in varying climates.
Frienda 3/16 Brake Line Fitting, 12 Pieces

This Frienda set combines four unions and eight nuts, all with 3/8-24 threads suitable for most 3/16″ tube applications. Brass construction improves rust resistance, while the brass-to-plating combination helps ensure longevity of critical brake line connections. Use this pack to cover multiple fittings in one project or for spare parts storage.
DEWHEL 12PCS 3/8-24 Inverted Flare Gold Zinc

DEWHEL offers a gold zinc-coated option that combines corrosion resistance with a distinctive finish. The 3/8-24 inverted flare nuts are designed for 3/16″ steel brake line tubing, delivering solid engagement in high-stress regions while maintaining compatibility with standard flare configurations.
3/8-24 20pc Set Inline Nuts Finish Gold Zinc

This inline set features 20 pieces with a gold zinc finish, including nuts and fittings intended for 3/16″ brake line tubing. The 3/8-24 threads and compact design support reliable assembly in compact engine bays and tight routing scenarios, aligning with OEM references such as GM9432075. This option is suitable for restorations and general repair work.
Buying Guide: Key Considerations For 3/8-24 Brake Fittings
Selection tips cover material, finish, and compatibility. Brass fittings offer good corrosion resistance and ease of threading, but steel variants can provide superior strength in high-pressure lines. Gold zinc finishes are visually distinct and provide robust corrosion protection, though the color should not be mistaken for a guaranteed performance attribute. When matching parts, confirm the tube diameter (commonly 3/16″) and the flare type (inverted flare is standard for many American applications). Consider purchasing a small assortment to cover variations in thread depth and nut size, reducing the risk of mismatched fittings during repairs.
Durability and ease of installation should guide decisions. Plated or zinc-coated fittings help resist rust in exposed or under-vehicle areas. For fleets or frequent use, a steel or brass combination that balances strength with install torque can improve reliability. If you are replacing multiple connections, selecting a pack with both unions and nuts can streamline a repair by supplying all necessary components in one order. Always verify product compatibility with your specific brake line material (steel, copper, or polymer-coated) and the flare standard your system uses.
Storage and organization are practical considerations. Keep fittings separated by size and thread type to prevent confusion during a repair. Label each subset with its corresponding tube size and flare standard to speed up future maintenance tasks. Finally, source fittings from reputable brands known for consistent threading and dimensional accuracy to minimize the risk of leaks and revisits to the workshop.