3/8 Inverted Flare Nut by S.U.R.&R. – Alloy Steel Left‑Hand Tube Nut

Description

Product Overview

The S.U.R.&R. 3/8 Inverted Flare Nut is engineered to meet the demanding requirements of industrial and fleet maintenance applications. Crafted from high‑grade alloy steel, this nut provides exceptional strength and resistance to corrosion, ensuring a long service life even in harsh environments. Its inverted flare design offers a secure, leak‑free connection when paired with compatible pipe fittings, while the left‑hand thread orientation (UNF, #8) simplifies installation on systems that require reverse threading. The nut measures 0.38 inches in diameter and weighs just 1.44 ounces, making it lightweight yet robust. Finished in a natural brown hue, the nut is supplied unfinished, allowing users to apply custom coatings or finishes as needed. With a model number SRRTR620 and UPC 812337013826, this component is easily identifiable for inventory management and ordering.

Usage

Designed for a wide range of pipe and tubing applications, the 3/8 Inverted Flare Nut excels in automotive, aerospace, and heavy‑equipment contexts where reliable fluid transfer is critical. It is particularly well‑suited for fleet and vehicle maintenance tasks, such as securing fuel lines, brake lines, and hydraulic hoses. The left‑hand thread is advantageous in scenarios where conventional right‑hand threads could interfere with other components, providing a clean and efficient solution. Installers appreciate the nut’s straightforward threading process, which reduces installation time and minimizes the risk of cross‑threading. Whether used in a workshop, on a service truck, or within a manufacturing line, this nut delivers consistent performance and helps maintain system integrity.

Why Choose Us

Choosing the S.U.R.&R. 3/8 Inverted Flare Nut means selecting a product backed by decades of expertise in fastener technology. Our commitment to quality is reflected in rigorous testing protocols that verify tensile strength, thread integrity, and corrosion resistance. Each nut undergoes a thorough inspection to ensure it meets exacting industry standards, and our manufacturing processes adhere to ISO‑9001 guidelines. In addition to superior product performance, we provide responsive customer support, offering technical assistance, fit‑verification tools, and a straightforward return policy. Our distribution network guarantees rapid delivery, helping you keep your inventory stocked and your projects on schedule.

Key Features

• Durable alloy steel construction resists rust and wear for long‑term reliability
• Inverted flare design creates a tight, leak‑free seal on 3/8″ pipe connections
• Left‑hand thread (#8 UNF) prevents interference with standard right‑hand components
• Lightweight yet strong, reducing overall system weight without sacrificing strength
• Dedicated after‑sales support ensures you receive expert guidance and quick replacements

FAQ

What size pipe does this nut fit?

The nut is sized for 3/8″ pipe and uses an internal #8 thread, making it compatible with standard 3/8″ inverted flare fittings.

Is the left‑hand thread compatible with standard right‑hand components?

Yes, the left‑hand thread is designed to work alongside right‑hand components without causing interference, providing flexibility in complex assemblies.

Can I apply a coating to the unfinished surface?

Absolutely. The unfinished exterior allows you to add protective coatings, such as zinc plating or paint, to match specific environmental or aesthetic requirements.

What is the recommended torque setting for installation?

We recommend a torque of 8‑10 ft‑lb for optimal sealing performance while avoiding over‑tightening that could damage the threads.

Do you offer bulk pricing for large orders?

Yes, bulk pricing and volume discounts are available. Contact our sales team with your quantity requirements for a customized quote.