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AC Flare Nut TOrque
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I got this from Automatic Machine Products
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Brass Flare Size
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Recommended Seating Torquefor Brass Flare Nuts
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1/4
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8 - 10 Ft. Lbs.
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3/8
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15 -18 Ft. Lbs.
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1/2
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28 - 32 Ft. Lbs.
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5/8
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38 - 42 Ft. Lbs.
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3/4
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50 - 55 Ft. Lbs.
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Notes:1. Prior to applying recommended torque to brass flare nut, it is highly recommended a small amount of refrigeration oil be applied totheflare threads, flare sealing surface, and copper tubing flared surface to prevent galling of sealing surfaces and aid in providing arefrigerant tight seal.