---
product_id: 15798772
title: "71098 37° Flaring & Double Flaring Adapter Set – Hydraulic Tool Compatible – For Automotive, Racing, Hydraulic & HVAC Applications (3/16” to 1/2”)"
brand: "mastercool"
price: "VT38784"
currency: VUV
in_stock: true
reviews_count: 13
category: "Mastercool"
url: https://www.desertcart.vu/products/15798772-71098-37-flaring-and-double-flaring-adapter-set-hydraulic-tool
store_origin: VU
region: Vanuatu
---

# Hardened steel for pro durability Hydraulic tool compatible for fast flares 5 die sets & adapters (3/16”–1/2”) 71098 37° Flaring & Double Flaring Adapter Set – Hydraulic Tool Compatible – For Automotive, Racing, Hydraulic & HVAC Applications (3/16” to 1/2”)

**Brand:** mastercool
**Price:** VT38784
**Availability:** ✅ In Stock

## Summary

> 🔧 Master every flare, race ahead of the pack!

## Quick Answers

- **What is this?** 71098 37° Flaring & Double Flaring Adapter Set – Hydraulic Tool Compatible – For Automotive, Racing, Hydraulic & HVAC Applications (3/16” to 1/2”) by mastercool
- **How much does it cost?** VT38784 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/15798772-71098-37-flaring-and-double-flaring-adapter-set-hydraulic-tool)

## Best For

- mastercool enthusiasts

## Why This Product

- Trusted mastercool brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted from hardened alloy steel to withstand demanding automotive, racing, and HVAC environments.
- • **Precision Perfected:** Achieve flawless 37° single & double flares every time with SAE J514 / ISO 8434-2 compliance.
- • **Trusted Pro Support:** Backed by 40+ years of U.S.-based expertise ensuring reliability and peace of mind.
- • **Speed Meets Accuracy:** Seamlessly integrates with Mastercool’s hydraulic flaring system for rapid, leak-free connections.
- • **All-in-One Size Coverage:** Includes 5 die sets and adapters spanning 3/16” to 1/2” tubing for versatile applications.

## Overview

The Mastercool 71098 37° Flaring & Double Flaring Adapter Set is a professional-grade kit designed for precision flaring of 3/16” to 1/2” tubing. Compatible with hydraulic flaring tools, it delivers leak-free, SAE and ISO standard-compliant 37° flares ideal for automotive, racing, aerospace, and HVAC applications. Built from hardened alloy steel, this durable set ensures long-lasting performance backed by decades of Mastercool’s trusted expertise.

## Description

OverviewThe Mastercool 71098 37° Flaring & Double Flaring Adapter Set provides the precision and flexibility professionals demand. Designed to work seamlessly with Mastercool’s hydraulic flaring tool, this kit covers all major sizes from 3/16” to 1/2”.ApplicationsThe 37° flare (AN/JIC standard) is widely used in hydraulic systems, aerospace fuel and oil lines, marine engines, motorsports plumbing, HVAC service, and general industrial machinery. Whether you’re working on construction equipment, aircraft fuel lines, or performance automotive systems, these adapters and dies provide accurate, leak-free connections.Key FeaturesFull set of adapters and dies for 3/16” to 1/2” tubingProduces precise 37° flares and double flaresMeets SAE J514 / ISO 8434-2 standardsHardened steel for durability and long lifeCompatible with Mastercool hydraulic flaring toolWhy MastercoolFor more than 40 years, Mastercool has been a trusted name in the automotive and HVAC industries. Our tools are built for professionals who demand accuracy, durability, and strong U.S.-based customer support.Technical SpecificationsKit Includes: 5 double flare die sets, 5 adapters, 37° coneSizes: 3/16”, 1/4”, 5/16”, 3/8”, 1/2”Standards: SAE J514, ISO 8434-2Material: Hardened steelApplications: Automotive (performance/racing), hydraulics, aerospace/AN fuel & oil lines, HVAC tubing

Review: Makes Perfect 37 Degree JIC flares - Man, I use the heck out of these things! I bought them as an add on to complete my Mastercool flare kit. These things are great quality, never slip on the hard line and work on Aluminum, CuNi, steel, and even really hard Stainless steel. Prettiest flares you've ever seen! Just remember to put the nut and sleeve on first... and face the sleeve in the right direction too.. Lol...
Review: Itemized dies parts# with details about kit - I bought this kit to add to my 45 degree kit so I can also do 37 degree flares but I noticed you only need square dies and the 37 degree cone the silver plunger for all the sizes is the same 45 degrees plunger die that comes in any 45 degree set The silver plungers are 45 degrees (as shown in picture) The cone is 37 degree And all the square dies are 37 degrees (as shown in picture) So if you already have a 45 degree set you only need the 37 degree cone and the 37 degree square dies for whatever size you plan to do. Picture with all part numbers This kit fits any hand hydraulic. The kit is priced decently Quick and easy to make 37 degree flares It functions as any 45° set, just for 37 degrees Fast and easy to use

## Features

- ✔️ COMPLETE 37° FLARING & DOUBLE FLARING KIT – Includes 37° cone, 5 die sets, and 5 matching adapters (3/16”, 1/4”, 5/16”, 3/8”, 1/2”)
- ✔️ HYDRAULIC TOOL COMPATIBLE – Engineered to work with Mastercool’s hydraulic flaring system for fast, precise results
- ✔️ WIDE-RANGE APPLICATIONS – Supports hydraulic systems, aerospace/AN fuel & oil lines, racing performance plumbing, and HVAC tubing
- ✔️ PROFESSIONAL-GRADE DURABILITY – Hardened steel construction built for long service life under demanding use
- ✔️ RELIABLE, LEAK-FREE SEALS – Produces accurate 37° single or double flares meeting SAE J514 / ISO 8434-2 standar
- ✔️ U.S.-BASED SUPPORT – Backed by Mastercool’s professional team with decades of experience in automotive and HVAC tools

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002YKNXKS |
| Best Sellers Rank | #166,233 in Automotive ( See Top 100 in Automotive ) #71 in Brake Repair Brake Flaring Tools |
| Brand | Mastercool |
| Color | Silver |
| Connector Type | Flare |
| Customer Reviews | 4.6 4.6 out of 5 stars (209) |
| Date First Available | March 15, 2007 |
| Exterior Finish | Aluminum |
| Global Trade Identification Number | 00700376710984 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2 pounds |
| Item dimensions L x W x H | 12.75 x 3.75 x 3.25 inches |
| Item model number | 71098 |
| Manufacturer | Mastercool |
| Manufacturer Part Number | 71098 |
| Material | Alloy Steel |
| Model | 37 Degree Hydraulic Flaring Tool Adapter Set |
| Number of Pieces | 37 |
| Product Dimensions | 12.75 x 3.75 x 3.25 inches |
| Size | 37 deg. Flaring & Double Flaring Adapter Set |
| Thread Size | 3/16", 1/4" |
| Thread Type | Metric Tapered |
| UPC | 700376710984 |

## Product Details

- **Brand:** Mastercool
- **Color:** Silver
- **Connector Type:** Flare
- **Exterior Finish:** Aluminum
- **Item Weight:** 2 Pounds
- **Item dimensions L x W x H:** 12.75 x 3.75 x 3.25 inches
- **Material:** Alloy Steel
- **Size:** 37 deg. Flaring & Double Flaring Adapter Set
- **Thread Size:** 3/16", 1/4"
- **Thread Type:** Metric Tapered

## Images

![71098 37° Flaring & Double Flaring Adapter Set – Hydraulic Tool Compatible – For Automotive, Racing, Hydraulic & HVAC Applications (3/16” to 1/2”) - Image 1](https://m.media-amazon.com/images/I/616Xb0MppRL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Makes Perfect 37 Degree JIC flares
*by B***N on August 21, 2018*

Man, I use the heck out of these things! I bought them as an add on to complete my Mastercool flare kit. These things are great quality, never slip on the hard line and work on Aluminum, CuNi, steel, and even really hard Stainless steel. Prettiest flares you've ever seen! Just remember to put the nut and sleeve on first... and face the sleeve in the right direction too.. Lol...

### ⭐⭐⭐⭐⭐ Itemized dies parts# with details about kit
*by D***O on April 15, 2025*

I bought this kit to add to my 45 degree kit so I can also do 37 degree flares but I noticed you only need square dies and the 37 degree cone the silver plunger for all the sizes is the same 45 degrees plunger die that comes in any 45 degree set The silver plungers are 45 degrees (as shown in picture) The cone is 37 degree And all the square dies are 37 degrees (as shown in picture) So if you already have a 45 degree set you only need the 37 degree cone and the 37 degree square dies for whatever size you plan to do. Picture with all part numbers This kit fits any hand hydraulic. The kit is priced decently Quick and easy to make 37 degree flares It functions as any 45° set, just for 37 degrees Fast and easy to use

### ⭐⭐⭐⭐⭐ Great tools!
*by P***T on May 18, 2023*

Great tools, I just wish there were slots provided in the case of the complete tool set , for these to be stored in. If not, then for the price there should have been a comparable blow-molded case for the extra dies. C'mon guys, a little common sense goes a long way here. Great tools, but you let us down on the storage aspects. Gotta protect my pricey tools! Got it?

## Frequently Bought Together

- Mastercool (71098 Silver 37 Degree Hydraulic Flaring Tool Adapter Set
- Mastercool 72485-PRC Universal Hydraulic Flaring Tool – 45° Double & Single Flares, Push Connect, GM Fuel Line, Brake Line & GM Transmission Cooling – Includes Hydraulic Ram & Mini Tube Cutter
- 4LIFETIMELINES Rimming & Deburring Tool for 3/16" to 1/2" Tubing, Exceptionally Versatile Tool, Achieve Optimal Tubing Flaring, Dubur Tubing Efficiently

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-21*