Dorman 499-251 | Brake Hydraulic Line Union

Part Number
Brake Line Union-Bubble Flare-3/16 In. x M10-1.0
Special Price $29.74 Regular Price $34.99
In stock
Only 9 left
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Estimated Ship Date: 1 Business Day or Less

Dorman offers a comprehensive line of Brake Line Unions for a range of brake repair jobs. All our Brake Line Unions are constructed of high-quality materials for a long service life.

BRAND: Dorman - Autograde


  • Conveniently packaged in a variety of piece counts to assist with both small and large projects
  • A large selection available to fit diverse thread sizes
  • Brake, Line, Union, Brakes, Lines, Unions
  • Available in bubble flare and inverted flare styles
  • Brake Line Union-Bubble Flare-3/16 In. x M10-1.0
  • Durable brass and metal design


Line Inside Diameter0.1875
Line Outside Diameter0.35
Line Outside Diameter0.188
Package ContentsBrake Line Union
SAE or MetricMetric
Thread Diameter10
Thread Pitch1
Thread SizeM10-1.0



  • PAPCO: PC1191
  • SUR&R Auto Parts: BR450
  • EDELMANN: 276000
  • AGS Company: BLUX-8
  • FMSI Universal: 3044
Customer Questions
Can I use Dorman parts to replace OEM parts?
Yes, Dorman parts can often be used as replacements for OEM parts, but it is important to carefully compare specifications and ensure compatibility.
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
Where is Dorman manufactured?
Dorman is a global automotive parts supplier with manufacturing facilities in the United States, Mexico, Canada, China, and India. Its headquarters and largest manufacturing facility are located in Colmar, Pennsylvania, USA.
What is a brake master cylinder?
The brake master cylinder converts brake pedal pressure into hydraulic pressure to activate the brakes.
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