1964-1974 [Subscribe to Daily Digest] |
The "bubble" <>- is the first step in forming a double flared fitting. The second step pushes the outer part of the "bubble" <>- into the other side to form a doubled "V" >>- shape. IIRC (not having them in front of me) the instructions for the forming tool still call it a double flare. Any good automotive store has the tool.
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