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American Grease Stick (AGS) Brass SAE Inverted Flare Union - For joining (2) 1/4" lines with double-flared ends - Thread: 7/16"-24, 1 each, sold by each - Walmart.com
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Brake lines for BMW's and E30's: the Bubble flare not the Double flare | RTS - Your Total BMW Enthusiast
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3/8 x 24 unf steel male no lead SAE (double, 45 degree, inverted) flare/American steel brake line nut for 3/16”/4.75mm brake tube
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